m overall electrical wiring diagram

Transcription

FOREWORD
This wiring diagram manual has been prepared to provide
information on the electrical system of the 2007 SCION tC.
Applicable models: ANT10 Series
Refer to the following manuals for additional service
specifications and repair procedures for these models:
Manual Name
D 2007 SCION tC Repair Manual
D 2007 SCION tC New Car Features
Pub. No.
RM0300U
NM0300U
All information in this manual is based on the latest product
information at the time of publication. However, specifications
and procedures are subject to change without notice.
NOTICE
Always follow the directions given in the above repair manuals when handling
supplemental restraint system components (such as removal, installation,
inspection, etc.) in order to prevent accidents and supplemental restraint
system malfunction.
E2006
All rights reserved. This book may not be
reproduced or copied, in whole or in part, without
the written permission of Toyota Motor
Corporation.
First Printing : May 29, 2006 01–060529–00
2007 tC
ELECTRICAL WIRING DIAGRAM
Section Code
Page
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . A . . . .
2
HOW TO USE THIS MANUAL . . . . . . . . . . . . . . . B . . . .
3
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . C . . . .
12
ABBREVIATIONS . . . . . . . . . . . . . . . . . . . . . . . . . D . . . .
17
GLOSSARY OF TERMS AND SYMBOLS . . . . . E . . . .
18
RELAY LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . F . . . .
20
ELECTRICAL WIRING ROUTING . . . . . . . . . . . G . . . .
34
SYSTEM CIRCUITS . . . . . . . . . . . . . . . . . . . . . . . . H . . . .
45
GROUND POINT . . . . . . . . . . . . . . . . . . . . . . . . . . . I . . . .
184
POWER SOURCE (Current Flow Chart) . . . . . J . . . .
188
CONNECTOR LIST . . . . . . . . . . . . . . . . . . . . . . . . K . . . .
194
PART NUMBER OF CONNECTORS . . . . . . . . . L . . . .
206
OVERALL ELECTRICAL WIRING DIAGRAM . M . . . .
210
1
SCION tC (EM0300U)
A INTRODUCTION
This manual consists of the following 13 sections:
No.
Section
Description
INDEX
Index of the contents of this manual.
INTRODUCTION
Brief explanation of each section.
B
HOW TO USE THIS
MANUAL
Instructions on how to use this manual.
C
TROUBLE–
SHOOTING
Describes the basic inspection procedures for electrical circuits.
D
ABBREVIATIONS
Defines the abbreviations used in this manual.
E
GLOSSARY OF
TERMS AND
SYMBOLS
Defines the symbols and functions of major parts.
F
RELAY LOCATIONS
Shows position of the Electronic Control Unit, Relays, Relay Block, etc.
This section is closely related to the system circuit.
G
ELECTRICAL
WIRING ROUTING
Describes position of Parts Connectors, Splice points, Ground points, etc.
INDEX
Index of the system circuits.
SYSTEM CIRCUITS
Electrical circuits of each system are shown from the power supply through ground
points. Wiring connections and their positions are shown and classified by code
according to the connection method. (Refer to the section, ”How to use this manual”).
The ”System Outline” and ”Service Hints” useful for troubleshooting are also contained
in this section.
I
GROUND POINT
Shows ground positions of all parts described in this manual.
J
POWER SOURCE
(Current Flow Chart)
Describes power distribution from the power supply to various electrical loads.
K
CONNECTOR LIST
Describes the form of the connectors for the parts appeared in this book.
L
PART NUMBER OF
CONNECTORS
Indicates the part number of the connectors used in this manual.
M
OVERALL
ELECTRICAL
WIRING DIAGRAM
Provides circuit diagrams showing the circuit connections.
A
H
2
SCION tC (EM0300U)
HOW TO USE THIS MANUAL B
This manual provides information on the electrical circuits installed on vehicles by
dividing them into a circuit for each system.
The actual wiring of each system circuit is shown from the point where the power
source is received from the battery as far as each ground point. (All circuit
diagrams are shown with the switches in the OFF position.)
When troubleshooting any problem, first understand the operation of the circuit
where the problem was detected (see System Circuit section), the power source
supplying power to that circuit (see Power Source section), and the ground points
(see Ground Point section). See the System Outline to understand the circuit
operation.
When the circuit operation is understood, begin troubleshooting of the problem
circuit to isolate the cause. Use Relay Location and Electrical Wiring Routing
sections to find each part, junction block and wiring harness connectors, wiring
harness and wiring harness connectors and ground points of each system circuit.
Internal wiring for each junction block is also provided for better understanding of
connection within a junction block.
Wiring related to each system is indicated in each system circuit by arrows
(from__, to__). When overall connections are required, see the Overall Electrical
Wiring Diagram at the end of this manual.
3
SCION tC (EM0300U)
B HOW TO USE THIS MANUAL
* The system shown here is an EXAMPLE ONLY. It is different to the actual
circuit shown in the SYSTEM CIRCUITS SECTION.
[A]
Stop Light
(BAT)
[N]
(IG)
15A
STOP
7.5A
GAUGE
2
[B]
3 IB
4 IB
L
(S/D)
W–R
R–L
1
7 3C
2
[G]
[C]
S6
Stop Light SW
15 3C
14 IE1
8
L4
Light Failure Sensor
4
11
1
(Shielded)
Stop
3
R6
Rear Combination
Light LH
R7
Rear Combination
Light RH
W–B
[J]
G–B
[I]
G–R
G–R
G–R
2
H17
High Mounted
Stop Light
[K]
1
6
W–B
W–B
1
BV1
W–B
W–B
W–B
3
BO
50
Rear
Lights
[F]
G–R
[H]
1
BV1
13
Y–G
L
G–W
(S/D)
G–W
2
Stop
[E]
[L]
BL
[M]
4
SCION tC (EM0300U)
C7
Combination Meter
4
15 IE1
7
4
R–L
L
(S/D)
R
G–W
Skid Control ECU
with Actuator
[D]
(W/G)
1
B
[A] : System Title
[H] : Indicates the wiring color.
Wire colors are indicated by an alphabetical code.
[B] : Indicates a Relay Block. No shading is used and
only the Relay Block No. is shown to distinguish it
from the J/B
Example:
Indicates Relay Block No.1
B
= Black
W = White
BR = Brown
L
= Blue
V
SB = Sky Blue
= Violet
R = Red
G = Green
LG = Light Green
[C] : (
) is used to indicate different wiring and
connector, etc. when the vehicle model, engine
type, or specification is different.
P
Y
GR = Gray
[D] : Indicates related system.
The first letter indicates the basic wire color and the
second letter indicates the color of the stripe.
= Pink
= Yellow
O = Orange
[E] : Indicates the wiring harness and wiring harness
connector. The wiring harness with male terminal is
shown with arrows (
).
Outside numerals are pin numbers.
Example:
L–Y
L
(Blue)
[I]
Female
Male (
)
Y
(Yellow)
: Indicates a wiring Splice Point
Example:
The first letter of the code for each wiring harness
and wiring harness connector(s) indicates the
component’s location, e.g, ”E” for the Engine
Compartment, ”I” for the Instrument Panel and
Surrounding area, and ”B” for the Body and
Surrounding area.
When more than one code has the first and second
letters in common, followed by numbers (e.g, IH1,
IH2), this indicates the same type of wiring harness
and wiring harness connector.
[F] : Represents a part (all parts are shown in sky blue).
The code is the same as the code used in parts
position.
[G] : Junction Block (The number in the circle is the J/B
No. and the connector code is shown beside it).
Junction Blocks are shaded to clearly separate
them from other parts.
[J] : Indicates a shielded cable.
[K] : Indicates the pin number of the connector.
The numbering system is different for female and
male connectors.
Example: Numbered in order
from upper left to
lower right
Numbered in order
from upper right to
lower left
Example:
3C indicates that
it is inside
Junction Block
No.3
Female
Male
[L] : Indicates a ground point.
The first letter of the code for each ground point(s)
indicates the component’s location, e.g, ”E” for the
Engine Compartment, ”I” for the Instrument Panel
and Surrounding area, and ”B” for the Body and
Surrounding area.
[M] : Page No.
[N] : Indicates the ignition key position(s) when the
power is supplied to the fuse(s).
5
SCION tC (EM0300U)
[O]
System Outline
Current is applied at all times through the STOP fuse to TERMINAL 2 of the stop light SW.
When the ignition SW is turned on, current flows from the GAUGE fuse to TERMINAL 8 of the light failure sensor, and also flows
through the rear lights warning light to TERMINAL 4 of the light failure sensor.
Stop Light Disconnection Warning
When the ignition SW is turned on and the brake pedal is pressed (Stop light SW on), if the stop light circuit is open, the current
flowing from TERMINAL 7 of the light failure sensor to TERMINALS 1, 2 changes, so the light failure sensor detects the
disconnection and the warning circuit of the light failure sensor is activated.
As a result, the current flows from TERMINAL 4 of the light failure sensor to TERMINAL 11 to GROUND and turns the rear lights
warning light on. By pressing the brake pedal, the current flowing to TERMINAL 8 of the light failure sensor keeps the warning
circuit on and holds the warning light on until the ignition SW is turned off.
[P]
: Parts Location
Code
See Page
Code
See Page
Code
See Page
C7
34
L4
36
R7
37
H17
36
R6
37
S6
35
[Q]
: Relay Blocks
Code
1
[R]
See Page
18
Relay Blocks (Relay Block Location)
R/B No.1 (Instrument Panel Brace LH)
: Junction Block and Wire Harness Connector
Code
See Page
Junction Block and Wire Harness (Connector Location)
3C
22
Instrument Panel Wire and J/B No.3 (Instrument Panel Brace LH)
IB
20
Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
[S]
: Connector Joining Wire Harness and Wire Harness
Code
See Page
Joining Wire Harness and Wire Harness (Connector Location)
IE1
42
Floor Wire and Instrument Panel Wire (Left Kick Panel)
BV1
50
Luggage Room Wire and Floor Wire (Luggage Room Left)
[T]
: Ground Points
Code
See Page
Ground Points Location
BL
50
Under the Left Center Pillar
BO
50
Back Panel Center
6
SCION tC (EM0300U)
B
[O] : Explains the system outline.
[P] : Indicates the reference page showing the position on the vehicle of the parts in the system circuit.
Example : Part ”L4” (Light Failure Sensor) is on page 36 of the manual.
∗ The letter in the code is from the first letter of the part, and the number indicates its order in parts
starting with that letter.
Example : L 4
Á
Á
Parts is 4th in order
Light Failure Sensor
[Q] : Indicates the reference page showing the position on the vehicle of Relay Block Connectors in the system circuit.
Example : Connector ”1” is described on page 18 of this manual and is installed on the left side of the instrument
panel.
[R] : Indicates the reference page showing the position on the vehicle of J/B and Wire Harness in the system circuit.
Example : Connector ”3C” connects the Instrument Panel Wire and J/B No.3. It is described on page 22 of this
manual, and is installed on the instrument panel left side.
[S] : Indicates the reference page describing the wiring harness and wiring harness connector (the female wiring
harness is shown first, followed by the male wiring harness).
Example : Connector ”IE1” connects the floor wire (female) and Instrument panel wire (male). It is described on
page 42 of this manual, and is installed on the left side kick panel.
[T] : Indicates the reference page showing the position of the ground points on the vehicle.
Example : Ground point ”BO” is described on page 50 of this manual and is installed on the back panel center.
7
SCION tC (EM0300U)
The ground points circuit diagram shows the connections from all major parts to the respective ground points. When
troubleshooting a faulty ground point, checking the system circuits which use a common ground may help you identify
the problem ground quickly. The relationship between ground points ( EA , IB and IC shown below) can also be
checked this way.
I GROUND POINT
W–B
W–B
FAN MAIN Relay
5
FAN MAIN Relay
5
A/C Control Assembly
W–B
5
A/C Relay No.3
5
W–B
A
W–B
A
W–B
Blower Motor
O/D Main SW
W–B
A/C Relay No.2
W–B
A
Cigarette Lighter
A W–B
W–B
Clock
Blower SW
A
W–B
W–B
A
Parking Brake SW
J1
Junction
Connector
W–B
Radiator Fan Motor
7
3B
W–B
Headlight Cleaner Relay
W–B
Combination Meter
W–B
W–B
Headlight LH
W–B
W–B
W–B
W–B
Front Fog Light LH
3
3F
13
3G
W–B
W–B
W–B
W–B
Front Turn Signal Light LH
Brake Fluid Level SW
W–B
W–B
5
3E
W–B
6
3E
Front Clearance Light LH
W–B
W–B
Door Lock Control SW
2
IA1
W–B
1
3D
W–B
W–B
Front Clearance Light RH
W–B
Front Fog Light RH
W–B
Front Turn Signal Light RH
W–B
Combination SW
7
3C
W–B
Headlight RH
Cruise Control ECU
Remote Control Mirror SW
Turn Signal Flasher
W–B
W–B
Defogger SW
W–B
Combination SW
W–B
W–B
W–B
W–B
Door Lock Motor RH
W–B
W–B
W–B
Door Courtesy SW RH
W–B
Unlock Warning SW
10 EA2
15 W–B
ID1
W–B
W–B
W–B
Door Lock Control Relay
W–B
Power Window Master SW
W–B
EA
W–B
Idle–Up SW
Door Courtesy SW LH
8 W–B
IB1
W–B
W–B
W–B
A/C Amplifier
W–B
W–B
W–B
W–B
W–B
W–B
Blower Resistor
Power Window Control
Relay
Door Lock Motor LH
W–B (4A–GZE)
4
Fuel Control SW
4
4
3
IC3
W–B
W–B
BR
Radio and Player
4
W–B
Woofer Speaker Amplifier
BR
W–B
BR
BR
BR
Combination Meter
4
BR
Fuel Sender
W–B
4
BR
5
BA1
W–B
BR
Auto Antenna Motor
Combination Meter
4
HEATER Relay
IB
*
IC
The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.
8
SCION tC (EM0300U)
B
The ”Current Flow Chart” section, describes which parts each power source (fuses, fusible links, and circuit breakers)
transmits current to. In the Power Source circuit diagram, the conditions when battery power is supplied to each system
are explained. Since all System Circuit diagrams start from the power source, the power source system must be fully
understood.
J POWER SOURCE (Current Flow Chart)
The chart below shows the route by which current flows from the battery to each electrical source
(Fusible Link, Circuit Breaker, Fues, etc.) and other parts
10A ECU–B
2
2
Short Pin
7.5A DOME
15A EFI
Battery
2
30A AM2
6
Fusible Link Block
10A HAZARD
2
20A RADIO NO.1
S2
Starter
10A HORN
6
100A ALT
5
60A ABS
Engine Room R/B (See Page 20)
20A
10A
Fuse
System
Page
STOP
ABS
ABS and Traction Control
Cruise Control
Electronically Controlled Transmission
Multiplex Communication System
194
187
180
166
210
DOME
Cigarette Lighter
Combination Meter
Headlight
Interior Light
Key Reminder and Seat Belt Warning
Light Auto Turn Off System
Theft Deterrent and Door Lock Control
214
230
112
122
Power Source
B
1
BA1
W
1.25B
FL MAIN
Battery
50A MAIN
B
2
1
7.5A DOME
2
2
W
7
EB1
W
W
1
1
2
R
1
7.5A AM1
2
1
2
2
W–R
6
EB1
W–R
W
B
15A HAZ–RADIO
2
W
8
4
AM2
2
AM1
1
ST2
IG2
ST1
IG1
ACC
I8
Ignition SW
2
20A DEFOG
B–Y
∗
1
1
2
1
W–R
The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.
9
SCION tC (EM0300U)
K CONNECTOR LIST
[A]
I14
I15
I16
Dark Gray
Gray
1 2 3 4
J1
[C]
1 2 3 4 5 6 7
1
2
3
4
5
6
7
8
[D]
[B]
J4
K1
Black
K2
L1
1 2
1 2
Dark Gray
A
A A
A A A A A
A B B
DD
A A B CC CDD
1
K CONNECTOR LIST
BA1
1 2 3
4 5
6 7 8 9 10 11 12 13
Black
BD2
[E]
1 2
3 4
5 6 7 8 9 10 11
5 4
3 2 1
13 12 11 10 9 8 7 6
Gray
[F]
4 3
2 1
11 10 9 8 7 6 5
[A] : Indicates connector to be connected to a part. (The numeral indicates the pin No.)
[B] : Junction Connector
Indicates a connector which is connected to a short terminal.
Junction Connector
Junction connector in this manual include a short terminal which is
connected to a number of wire harnesses. Always perform
inspection with the short terminal installed. (When installing the
wire harnesses, the harnesses can be connected to any position
within the short terminal grouping. Accordingly, in other vehicles,
the same position in the short terminal may be connected to a wire
harness from a different part.)
Wire harness sharing the same short terminal grouping have the
same color.
Same Color
Short Terminal
[C] : Parts Code
The first letter of the code is taken from the first letter of part, and the numbers indicates its order in parts which
start with the same letter.
[D] : Connector Color
Connectors not indicated are milky white in color.
[E] : Indicates the connector shapes which are used to join wire harnesses.
On Left : Female connector shapes
On Right : Male connector shapes
Numbers indicate pin numbers.
[F] : Indicates connector colors. (Connectors with not indicated colors are white)
10
SCION tC (EM0300U)
B
L PART NUMBER OF CONNECTORS
Part Name
Code
Part Number
Code
Part Name
Part Number
A1
A/C Ambient Temp. Sensor
90980–11070
D4
Diode (Courtesy)
90980–11608
A2
A/C Condenser Fan Motor
90980–11237
D5
Diode (Interior Light)
90980–10962
A3
A/C Condenser Fan Relay
90980–10940
D6
Diode (Moon Roof)
90980–11608
90980–10848
A4
A/C Condenser Fan Resistor
90980–10928
D7
Door Lock Control Relay
A5
A/C Magnetic Clutch
90980–11271
D8
Door Lock Control SW LH
A6
A/T Oil Temp. Sensor
90980–11413
D9
Door Lock Control SW RH
A7
[A]
ABS Actuator
[B]
90980–11151
[C]
D10
Door Courtesy SW LH
A8
ABS Actuator
90980–11009
D11
Door Courtesy SW RH
90980–11148
90980–11097
A9
ABS Speed Sensor Front LH
90980–10941
D12
Door Courtesy SW Front LH
A10
ABS Speed Sensor Front RH
90980–11002
D13
Door Courtesy SW Front RH
A11
Airbag Sensor Front LH
D14
Door Courtesy SW Rear LH
A12
Airbag Sensor Front RH
A13
Airbag Squib
90980–11156
90980–11856
D15
Door Courtesy SW Rear RH
90980–11194
D16
Door Key Lock and Unlock SW LH
90980–11070
D17
Door Key Lock and Unlock SW RH
90980–11170
[A] : Part Code
[B] : Part Name
[C] : Part Number
Toyota Part Number are indicated.
Not all of the above part numbers of the connector are established for the supply.
11
SCION tC (EM0300U)
C TROUBLESHOOTING
To Ignition SW
IG Terminal
(a) Establish conditions in which voltage is present at the check
point.
Example:
[A] – Ignition SW on
[B] – Ignition SW and SW 1 on
[C] – Ignition SW, SW 1 and Relay on (SW 2 off)
Fuse
[A]
SW 1
VOLTAGE CHECK
Voltmeter
[B]
(b) Using a voltmeter, connect the negative lead to a good ground
point or negative battery terminal, and the positive lead to the
connector or component terminal.
This check can be done with a test light instead of a voltmeter.
Relay
[C]
Solenoid
SW 2
CONTINUITY AND RESISTANCE CHECK
(a) Disconnect the battery terminal or wire so there is no voltage
between the check points.
Ohmmeter
(b) Contact the two leads of an ohmmeter to each of the check
points.
SW
If the circuit has diodes, reverse the two leads and check
again.
When contacting the negative lead to the diode positive side
and the positive lead to the negative side, there should be
continuity.
When contacting the two leads in reverse, there should be no
continuity.
Ohmmeter
Diode
Digital Type
Analog Type
(c) Use a volt/ohmmeter with high impedance (10 kΩ/V
minimum) for troubleshooting of the electrical circuit.
12
SCION tC (EM0300U)
C
FINDING A SHORT CIRCUIT
To Ignition SW
IG Terminal
(a) Remove the blown fuse and disconnect all loads of the fuse.
(b) Connect a test light in place of the fuse.
(c) Establish conditions in which the test light comes on.
Test Light
Fuse Case
Example:
[A] – Ignition SW on
[B] – Ignition SW and SW 1 on
[C] – Ignition SW, SW 1 and Relay on (Connect the
Relay) and SW 2 off (or Disconnect SW 2)
Short [A]
SW 1
(d) Disconnect and reconnect the connectors while watching the
test light.
The short lies between the connector where the test light
stays lit and the connector where the light goes out.
Short [B]
Disconnect
Disconnect
Light
(e) Find the exact location of the short by lightly shaking the
problem wire along the body.
Relay
CAUTION:
Short [C]
Disconnect
SW 2
Solenoid
(a) Do not open the cover or the case of the ECU unless
absolutely necessary. (If the IC terminals are touched,
the IC may be destroyed by static electricity.)
(b) When replacing the internal mechanism (ECU part) of
the digital meter, be careful that no part of your body or
clothing comes in contact with the terminals of leads
from the IC, etc. of the replacement part (spare part).
DISCONNECTION OF MALE AND FEMALE
CONNECTORS
To pull apart the connectors, pull on the connector itself, not
the wire harness.
HINT : Check to see what kind of connector you are
disconnecting before pulling apart.
Pull Up
Pull Up
Press Down
Press Down
13
SCION tC (EM0300U)
C TROUBLESHOOTING
HOW TO REPLACE TERMINAL
(with terminal retainer or secondary locking device)
Reference:
1. PREPARE THE SPECIAL TOOL
10
3
1
Example:
(Case 1)
1
HINT : To remove the terminal from the connector, please
construct and use the special tool or like object shown on
the left.
2. DISCONNECT CONNECTOR
0.2
(mm)
Up
Tool
3. DISENGAGE THE SECONDARY LOCKING DEVICE OR
TERMINAL RETAINER.
(a) Locking device must be disengaged before the terminal
locking clip can be released and the terminal removed from
the connector.
(b) Use a special tool or the terminal pick to unlock the secondary
locking device or terminal retainer.
NOTICE:
Do not remove the terminal retainer from connector body.
Terminal Retainer
[A]
Terminal Retainer
For Non–Waterproof Type Connector
HINT : The needle insertion position varies according to the
connector’s shape (number of terminals etc.), so
check the position before inserting it.
”Case 1”
[Retainer at Full Lock Position]
Raise the terminal retainer up to the temporary lock
position.
Stopper
Terminal
Retainer
[Retainer at Temporary Lock Position]
Example:
(Case 2)
Secondary
Locking Device
”Case 2”
Open the secondary locking device.
14
SCION tC (EM0300U)
C
Tool
Tab
Tab
Example:
(Case 1)
[B]
Terminal
Retainer
Tool
[Male]
Access Hole
(
Mark)
Tool
For Waterproof Type Connector
HINT : Terminal retainer color is different
according to connector body.
Example:
Terminal Retainer
Black or White
Black or White
Gray or White
: Connector Body
: Gray
: Dark Gray
: Black
[Female]
”Case 1”
Type where terminal retainer is pulled
up to the temporary lock position (Pull
Type).
Insert the special tool into the terminal
retainer access hole (YMark) and pull
the terminal retainer up to the
temporary lock position.
Retainer
at Full Lock Position
HINT : The needle insertion position varies
according to the connector’s shape
(Number of terminals etc.), so check
the position before inserting it.
Retainer
at Temporary Lock Position
[Male]
Example:
(Case 2)
[Female]
”Case 2”
Type which cannot be pulled as far as
Power Lock insert the tool straight into
the access hole of terminal retainer as
shown.
Terminal Retainer
Tool
Tool
[Male]
Press Down
Press Down
[Female]
15
SCION tC (EM0300U)
C TROUBLESHOOTING
Push the terminal retainer down to the temporary lock position.
Retainer at
Full Lock Position
Retainer at
Temporary Lock Position
[Male]
[Female]
(c) Release the locking lug from terminal and pull the terminal out
from rear.
Locking Lug
Tool
4. INSTALL TERMINAL TO CONNECTOR
(a) Insert the terminal.
HINT:
1. Make sure the terminal is positioned correctly.
2. Insert the terminal until the locking lug locks firmly.
3. Insert the terminal with terminal retainer in the temporary lock
position.
(b) Push the secondary locking device or terminal retainer in to
the full lock position.
5. CONNECT CONNECTOR
16
SCION tC (EM0300U)
ABBREVIATIONS D
ABBREVIATIONS
The following abbreviations are used in this manual.
A/C
=
Air Conditioning
A/T
=
Automatic Transaxle
ABS
=
Anti–Lock Brake System
CAN
=
Controller Area Network
DEF
=
Defogger
ECU
=
Electronic Control Unit
ESA
=
Electronic Spark Advance
FL
=
Fusible Link
IC
=
Integrated Circuit
INT
=
Intermittent
J/B
=
Junction Block
LH
=
Left–Hand
M/T
=
Manual Transaxle
R/B
=
Relay Block
RH
=
Right–Hand
SFI
=
Sequential Multiport Fuel Injection
SRS
=
Supplemental Restraint System
SW
=
Switch
TEMP.
=
Temperature
TVIP
=
TOYOTA Vehicle Intrusion Protection
VSV
=
Vacuum Switching Valve
w/
=
With
w/o
=
Without
∗ The titles given inside the components are the names of the terminals (terminal codes) and are not treated as being
abbreviations.
17
SCION tC (EM0300U)
E GLOSSARY OF TERMS AND SYMBOLS
GROUND
The point at which wiring attaches to
the Body, thereby providing a return
path for an electrical circuit; without a
ground, current cannot flow.
BATTERY
Stores chemical energy and
converts it into electrical energy.
Provides DC current for the auto’s
various electrical circuits.
CAPACITOR (Condenser)
A small holding unit for temporary
storage of electrical voltage.
CIGARETTE LIGHTER
An electric resistance heating
element.
HEADLIGHTS
Current flow causes a headlight
1. SINGLE
FILAMENT filament to heat up and emit light. A
headlight may have either a single
(1) filament or a double (2) filament
2. DOUBLE
FILAMENT
CIRCUIT BREAKER
Basically a reusable fuse, a circuit
breaker will heat and open if too
much current flows through it.
Some units automatically reset when
cool, others must be manually reset.
HORN
An electric device which sounds a
loud audible signal.
DIODE
A semiconductor which allows
current flow in only one direction.
IGNITION COIL
Converts low–voltage DC current
into high–voltage ignition current for
firing the spark plugs.
DIODE, ZENER
LIGHT
Current flow through a filament
causes the filament to heat up and
emit light.
A diode which allows current flow in one
direction but blocks reverse flow only up
to a specific voltage. Above that potential,
it passes the excess voltage. This acts as
a simple voltage regulator.
PHOTODIODE
The photodiode is a semiconductor
which controls the current flow
according to the amount of light.
LED (LIGHT EMITTING DIODE)
Upon current flow, these diodes emit
light without producing the heat of a
comparable light.
DISTRIBUTOR, IIA
Channels high–voltage current from
the ignition coil to the individual
spark plugs.
METER, ANALOG
Current flow activates a magnetic
coil which causes a needle to move,
thereby providing a relative display
against a background calibration.
FUSE
METER, DIGITAL
Current flow activates one or many
LED’s, LCD’s, or fluorescent
displays, which provide a relative or
digital display.
A thin metal strip which burns through
when too much current flows through it,
thereby stopping current flow and
protecting a circuit from damage.
FUEL
FUSIBLE LINK
(for Medium Current Fuse)
(for High Current Fuse or
Fusible Link)
A heavy–gauge wire placed in high
amperage circuits which burns through on
overloads, thereby protecting the circuit.
The numbers indicate the crosssection
surface area of the wires.
M
18
SCION tC (EM0300U)
MOTOR
A power unit which converts
electrical energy into mechanical
energy, especially rotary motion.
E
SPEAKER
An electromechanical device which
creates sound waves from current
flow.
RELAY
Basically, an electrically operated
1. NORMALLYswitch which may be normally
CLOSED closed (1) or open (2).
Current flow through a small coil
creates a magnetic field which either
opens or closes an attached switch.
2. NORMALLY
OPEN
SWITCH, MANUAL
Opens and closes
circuits, thereby
1. NORMALLY
stopping (1) or
OPEN
allowing (2) current
flow.
RELAY, DOUBLE THROW
A relay which passes current
through one set of contacts or the
other.
2. NORMALLY
CLOSED
RESISTOR
An electrical component with a fixed
resistance, placed in a circuit to
reduce voltage to a specific value.
SWITCH, DOUBLE THROW
A switch which continuously passes
current through one set of contacts
or the other.
RESISTOR, TAPPED
A resistor which supplies two or
more different non adjustable
resistance values.
SWITCH, IGNITION
A key operated switch with several
positions which allows various
circuits, particularly the primary
ignition circuit, to become
operational.
RESISTOR, VARIABLE or RHEOSTAT
A controllable resistor with a variable
rate of resistance.
Also called a potentiometer or
rheostat.
(Reed Switch Type)
SENSOR (Thermistor)
A resistor which varies its resistance
with temperature.
SWITCH, WIPER PARK
Automatically returns wipers to the
stop position when the wiper switch
is turned off.
SENSOR, SPEED
Uses magnetic impulses to open
and close a switch to create a signal
for activation of other components.
TRANSISTOR
A solidstate device typically used as
an electronic relay; stops or passes
current depending on the voltage
applied at ”base”.
SHORT PIN
Used to provide an unbroken
connection within a junction block.
SOLENOID
An electromagnetic coil which forms
a magnetic field when current flows,
to move a plunger, etc.
WIRES
Wires are always drawn as
(1) NOT
straight lines on wiring
CONNECTED diagrams.
Crossed wires (1) without a
black dot at the junction are
not joined;
crossed wires (2) with a
black dot or octagonal ( )
(2) SPLICED
mark at the junction are
spliced (joined)
connections.
19
SCION tC (EM0300U)
F RELAY LOCATIONS
[Engine Compartment]
Engine Room
R/B No.2
Skid Control ECU
with Actuator
Engine Room R/B
Engine Room J/B
[Body]
Sliding Roof Control ECU
Tire Pressure
Warning Antenna
and Receiver
Door Control Receiver
Occupant
Classification ECU
20
SCION tC (EM0300U)
F
[Instrument Panel]
Transponder Junction
Transponder
Key ECU
Connector (CAN) Key Amplifier
Tire Pressure
Warning ECU
Integration Relay
Engine Control
Module
Instrument Panel
J/B
A/C Control
Assembly
Power Point
Socket Relay
Airbag Sensor
Assembly Center
Shift Lock
Control ECU
21
SCION tC (EM0300U)
F RELAY LOCATIONS
2
: Engine Room R/B
: Engine Room J/B
Engine Compartment Left (See Page 20)
* 1:H-LP RH LO
* 2:H-LP LH LO
* 3:H-LP RH HI
* 4:H-LP LH HI
FAN NO.1 Relay
2
2
3 5
2
10A
*1
10A
2
1
1
*2
10A
*3
10A
*4
10A
ECU-B
7.5A
DOME
20A
RAD NO.1
1
EFI Relay
HORN Relay
50A ABS NO.1
(for High Current)
H-LP Relay
2
2
1
1
2
2
1
1
5
3
2
1
3 5
1
2
4
1
2
3 5
1
2
1
2
3 5
1
3 5
1
1
3
2A
2
2
2
2
2
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
20A
EFI
10A
OBD2
10A
TURN-HAZ
10A
HORN
15A
IGN
10A
ETCS
30A
AM2
7.5A
ALT-S
30A
DCC
40A ABS NO.2
(for High Current)
IG2 Relay
30A RDI
(for High Current)
1
(from Engine Wire)
40A HTR
(for High Current)
FAN NO.2 Relay
30A CDS
(for High Current)
5
2
FAN NO.3 Relay
1
2
40A MAIN
(for High Current)
22
SCION tC (EM0300U)
120A ALT
(for High Current)
F
3
: Engine Room R/B No.2
2
2
MG / C Relay
1
3 5
Inside of the Engine Room R/B Box (See Page 20)
ST
2 7.5A 1
1
5
3
ST Relay
23
SCION tC (EM0300U)
F RELAY LOCATIONS
: Instrument Panel J/B
19
20
21
22
23
24
25
26
1
2
3
4
5
6
7
8
27
28
29
30
9
10
11
12
31
32
33
34
35
36
13
14
15
16
17
18
1
2
3
4
5
6
7
23
24
25
26
8
9
10
11
27
28
29
30
12
13
14
15
1413 12 1110 9 8
1615 1413 12 1110 9
7 6 5 4 3 2 1
8 7 6 5 4 3 2 1
1B
(from Instrument Panel Wire)
(from Instrument Panel Wire)
1D
1
2
3
4
5
6
7
16
17
18
19
20
21
22
1
2
3
4
5
6
7
8
19
20
21
22
23
24
25
26
8
9
10
11
23
24
25
26
9
10
11
12
27
28
29
30
12
13
14
15
27
28
29
30
13
14
15
16
17
18
31
32
33
34
35
36
(from Engine Room
Main Wire)
16
17
18
19
20
21
22
Lower Finish Panel (See Page 21)
1A
1 3
4
5
2 6
1C
7 6 5 4 3 2 1
1413 121110 9 8
(from Instrument
Panel Wire)
8 7 6 5 4 3 2 1
1615 1413 121110 9
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
4
3
2
1
1
1
2
3
4
5
6
7
8
17
18
19
20
21
22
23
24
9
10
11
12
25
26
27
28
13
14
15
16
29
30
31
32
1E
2
3
2
1
8
7
6
5
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
25
26
27
28
9
10
11
12
29
30
31
32
13
14
15
16
(from Instrument
Panel Wire)
1
1
1
4
4
3
2
1
1J
3 1
4
5
6 2
(from Roof Wire)
1K
1
1
5
5
3
4
8 7 6 5 4
3
2 1
3
(from Instrument
Panel Wire)
2
2
18
17
16
15
14
13
12
11
10
1H
2
(from Floor Wire)
9
8
7
6
5
4
3
2
1
30A POWER
(for Middle Current)
1F
30A DEF
(for High Current)
1
4
5
6
2
3
7
8
(from Instrument
Panel Wire)
1L
IG1 Relay
1
1G
HTR Relay
1
FLASH Relay
(from Engine Room Main Wire)
(from Engine Room Main Wire)
24
SCION tC (EM0300U)
F
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Integration Relay
12 11 10 9 8 7
6 5 4 3 2 1
7 8 9 101112
1 2 3 4 5 6
1M
10 1112 13 1415161718
1 2 3 4 5 6 7 8 9
6 7 8 9 10
1 2 3 4 5
6 7 8 9 101112 13
1 2 3
4 5
1Q
13121110 9 8 7 6
5 4
3 2 1
(from Instrument
Panel Wire)
(from Instrument
Panel Wire)
1S
1P
1 2 3 4 5 6 7 8 9
1011 121314 15 16 17 18
(from Instrument
Panel Wire)
1 2 3 4 5
6 7 8 9 10
(from Instrument
Panel Wire)
25
SCION tC (EM0300U)
26
SCION tC (EM0300U)
AM1
15A
FR FOG
25A
20A
DOOR
10A
STOP
20A
FL DOOR
15A
IG2
10A
MET IG2
7.5A
RR DEF I/UP
15A
ACC SOCKET
20A
S/ROOF
15A
CIG
7.5A
ACC
: Instrument Panel J/B
15A
FR WSH
7.5A
ECU-IG
10A
GAUGE
30A
FR WIP
10A
TAIL
7.5A
PANEL
10A
A/C
20A
FR DOOR
F RELAY LOCATIONS
Lower Finish Panel (See Page 21)
Memo
27
SCION tC (EM0300U)
F RELAY LOCATIONS
[Instrument Panel J/B Inner Circuit]
* 1:w/ Jam Protection
* 2:w/o Jam Protection
2 1D
10 1A
6 1E
29 1A
13 1C
15 1B
30 1A
T-LP Relay
10A TAIL
1 1G
33 1B
10 1E
15 1E
7.5A PANEL
6 1P
3 1E
2 1Q
9 1S
7 1P
13 1B
8 1Q
8 1S
8 1P
7 1C
9 1P
3 1P
6 1Q
4 1P
10 1P
5 1P
12 1B
9 1Q
(*1)
5 1K
PWR Relay
(*2)
(*2)
7 1Q
30A POWER (*2)
17 1A
18 1S
(*2)
24 1E
2 1H
(*2)
11 1H
20A FR DOOR (*1)
21 1B
10 1H
9 1A
12 1A
1 1A
25 1B
19 1A
4 1E
20A S/ROOF (*1)
12 1C
6 1K
3 1J
17 1B
7.5A RR DEF I/UP
11 1M
DEF Relay
35 1B
1
2
2 1F
30A DEF
12 1Q
4 1Q
15A FR FOG
4 1M
23 1B
13 1Q
8 1E
20A DOOR
1 1H
13 1E
12 1D
2 1A
(*2)
(*2)
25A AM1
(Cont. Next Page)
28
SCION tC (EM0300U)
1 1F
F
(*2)
(*2)
(Cont'd)
10A STOP
18 1B
30 1E
5 1S
14 1E
20A FL DOOR
2 1M
17 1E
8 1M
28 1E
15A ACC SOCKET
6 1M
12 1E
7 1M
9 1M
1 1K
5 1M
15 1A
6 1D
(*2)
1 1S
15 1S
1 1J
19 1B
4
7 1F
5 1Q
3
5
1
2
1 1L
10 1B
HTR Relay
31 1B
16 1S
14 1B
2
28 1A
4
32 1B
5
11 1S
8
17 1S
5 1D
LR
IG
+B
LL
EL
ER
EHW GND
1
13 1S
3
27 1A
6
12 1S
7
FLASH Relay
19 1E
11 1C
7 1S
Noise Filter
1 1C
9 1C
5
3
2
1
7.5A ECU-IG
24 1B
3 1K
13 1A
3 1F
IG1 Relay
36 1B
2 1C
10 1C
20 1E
30A FR WIP
2 1J
14 1S
11 1E
32 1E
15A FR WSH
1 1P
2 1P
10 1D
(*2)
2 1B
10A GAUGE
(Cont. Next Page)
29
SCION tC (EM0300U)
F RELAY LOCATIONS
[Instrument Panel J/B Inner Circuit]
(Cont'd)
25 1A
11 1Q
10 1Q
1 1Q
29 1B
10 1S
10A A/C
10 1M
8 1F
18 1E
2 1E
C/OPN Relay
11 1B
8 1A
5 1E
1 1D
9 1B
15 1C
21 1E
15A IG2
27 1B
4 1F
16 1E
10A MET IG2
1 1M
12 1M
5 1F
15A CIG
3 1Q
7.5A ACC
4 1S
6 1S
14 1D
(Cont. Next Page)
30
SCION tC (EM0300U)
F
(Cont'd)
16 1C
34 1B
25 1
19
HAZ GND TRLY
16 1B
4 1J
4
5
ALTB SIG
20
PCTY
9 1E
4 1K
DCTY
KOF
26
UL1
5 1A
20 1A
7
ILL
2 1S
13 1H
4 1H
30 1B
12
L1
12 1H
ECUB
3 1A
6
17 1H
8 1H
ACT+
28 1B
Integration Relay
26 1E
8 1D
23 1E
11
SPD
KSW
9
4 1D
4 1C
15 1H
22 1B
6 1H
UL2
5 1C
16
9 1D
7 1A
3 1D
25 1E
2
8 1C
1 1E
21 1A
7 1D
10
2 1K
27 1E
24 1A
6 1C
13
14 1H
5 1H
14 1C
22 1A
18 1H
23
BCTY
9 1H
ACT-
26 1B
3
7 1E
4 1A
18 1A
3 1S
16 1H
L2
31 1E
14
7 1H
31
SCION tC (EM0300U)
F RELAY LOCATIONS
Junction Connector
Behind of the Combination Meter (See Page 21)
(CAN)
J13
J14
2
2
1
1
J15
1
1
1
1
1
2
2
2
3
32
SCION tC (EM0300U)
ST-Plug
F
[Junction Connector Inner Circuit]
(CAN)
J13(A), J14(B), J15(C)
Junction Connector
2
A
2
B
ST-Plug
3
1
A
2
1
1
C
1
B
33
SCION tC (EM0300U)
G ELECTRICAL WIRING ROUTING
Position of Parts in Engine Compartment
C2
F1
H5
F2
F3
F4
C1
A3
B2
C3
G2
B1
H4
H2
G1
H1
H3
A5
A
A
A
A
A
A
1
2
3
4
5
6
A1
A6
H6
E3
E2
H7
A2
F
F
F
F
A/C Compressor
Air Fuel Ratio Sensor (Bank 1 Sensor 1)
Airbag Sensor (Front LH)
Airbag Sensor (Front RH)
Ambient Temp. Sensor
1
2
3
4
E1
A4
Fuel Injector (No.1)
G 1 Generator
G 2 Generator
B 1 Back–Up Lamp SW
B 2 Brake Fluid Level Warning SW
C 1 Camshaft Position Sensor
C 2 Camshaft Timing Oil Control Valve
C 3 Crankshaft Position Sensor
E 1 Electronically Controlled Transmission Solenoid
E 2 Engine Coolant Temp. Sensor
E 3 Engine Oil Pressure SW
H
H
H
H
H
H
H
1
2
3
4
5
6
7
Headlamp (LH High)
Headlamp (LH Low)
Headlamp (RH High)
Headlamp (RH Low)
Heated Oxygen Sensor (Bank 1 Sensor 2)
Horn (Low)
Horn (High)
34
SCION tC (EM0300U)
G
Position of Parts in Engine Compartment
I2
I3
I4
T1
V1
W2
S3
I1
S2
P4
M1
S1
S5
P3
T3
W1
P2
T5
I
I
I
I
1
2
3
4
Ignition Coil (No.1)
P5
K1
N1
R1
T2
S4
P1
T4
Z1
S
S
S
S
S
1
2
3
4
5
Skid Control ECU with Actuator
Speed Sensor (Front LH)
Speed Sensor (Front RH)
Starter
Starter
T
T
T
T
T
1
2
3
4
5
Throttle Body Assembly
Transmission Revolution Sensor (Counter Gear)
Transmission Revolution Sensor (Turbine)
Turn Signal Lamp (Front LH)
Turn Signal Lamp (Front RH)
K 1 Knock Control Sensor (Bank 1)
M 1 Mass Air Flow Meter
N 1 Noise Filter (Ignition)
P
P
P
P
P
1
2
3
4
5
Park/Neutral Position SW
Parking Lamp (LH)
Parking Lamp (RH)
Power Steering Oil Pressure SW
Pressure SW
R 1 Radiator Fan Motor
V 1 VSV (Purge)
W 1 Windshield Washer Motor
W 2 Windshield Wiper Motor
Z 1 Option Connector (Front Fog Lamp)
35
SCION tC (EM0300U)
Position of Parts in Instrument Panel
C6
C8
B4
D1
D3
A8
A14
A15
E4
E5
D5
E7
C9
E8
C5
B3
D4
A10
A 7
A 8
A 9
A 10
A 11
A 12
A 13
A 14
A 15
A 16
A 17
C7
A16
A17
A11
A/C Thermistor No.1
A/T Shift Lever Illumination
Accelerator Position Sensor
Airbag Sensor Assembly Center
Airbag Squib (Front Passenger’s Airbag Assembly)
Airbag Squib (Front Passenger’s Airbag Assembly)
Airbag Squib (Steering Wheel Pad)
Antenna Amplifier
A12
A13
C4
D2
A9
F5
A7
D
D
D
D
D
1
2
3
4
5
Damper Servo Motor (Air Inlet)
Damper Servo Motor (Air Mix)
Damper Servo Motor (Air Vent Mode)
Data Link Connector 3
Diode (Fan)
E
E
E
E
4
5
7
8
Engine Control Module
F 5 Front Console Illumination
B 3 Blower Motor
B 4 Blower Motor Control
C
C
C
C
C
C
4
5
6
7
8
9
Cigarette Lighter
Clutch Start SW
Combination Meter
Combination SW
Combination SW
Cruise Control Clutch SW
36
SCION tC (EM0300U)
G
Position of Parts in Instrument Panel
T8
J6
J15
J14
J13
Z5
R9
T6
J7
J8
T11
J9
S8
J2
J1
I6
Z3
N2
J3
O1
Z2
P8
J4
J5
* 1:w/ Engine Immobiliser System
* 2:w/o Engine Immobiliser System
K2
I
I
I
5 Ignition SW
6 Integration Relay
7 Ignition Cylinder Lamp
J 1
J 2
J 3
J 4
J 5
J 6
J 7
J 8
J 9
J 13
J 14
J 15
Junction Connector
Junction Connector
Junction Connector
Junction Connector
Junction Connector
Junction Connector
Junction Connector
Junction Connector
Junction Connector
Junction Connector
Junction Connector
Junction Connector
U1
I5
S7
T7
I7
(*1)
(*2)
R2
R3
Z4
S6
P6
P7
S20
P 6 Parking Brake SW
P 7 Power Point Socket
P 8 Power Point Socket Relay
R 2 Radio Receiver Assembly
S 6
S 7
S 8
S 20
Shift Lock Control ECU
Spiral Cable
Stop Lamp SW
Stereo Jack Adapter
T 6
T 7
T 8
T 11
Tire Pressure Warning Reset SW
Transponder Key Amplifier
Transponder Key ECU
Tire Pressure Warning ECU
K 2 Knee Airbag Squib
U 1 Unlock Warning SW
N 2 Noise Filter (DOME)
O 1 Outer Mirror SW
Z
Z
Z
Z
2
3
4
5
Option Connector (Front Fog Lamp SW)
Option Connector (TVIP)
Option Connector (IPOD Unit)
Option Connector (Radio Receiver Assembly)
37
SCION tC (EM0300U)
Position of Parts in Body
M3
M2
C11
(*3)
(*4)
D13
D14
C12
D12
D10
A19
C10
L3
D11
L2
D8
B5
D9
B6
N3
F6
F7
J10
F8
J11
J12
F
F
F
F
A 18 Airbag Sensor (Rear LH)
A 19 Airbag Sensor (Rear RH)
B 5 Back Door Lock Assembly
B 6 Back Door Opener SW
6
7
8
9
D7
F9
L1
Front Seat Inner Belt (Driver’s Side)
Front Seat Inner Belt (Front Passenger’s Side)
Fuel Suction Pump and Gage Assembly
J 10 Junction Connector
C10 Center Stop Lamp
C 11 Curtain Shield Airbag Squib (LH)
C12 Curtain Shield Airbag Squib (RH)
D 7
D 8
D 9
D10
D 11
D12
D13
D14
A18
Diode (Room Lamp)
Door Courtesy SW (Driver’s Side)
Door Courtesy SW (Front Passenger’s Side)
Door Lock Assembly (Driver’s Side)
Door Lock Assembly (Front Passenger’s Side)
L 1 Canister Pump Module
L 2 License Plate Lamp (LH)
L 3 License Plate Lamp (RH)
M 2 Map Lamp
M 3 Map Lamp
N 3 Noise Filter (DEF and Stop)
38
SCION tC (EM0300U)
G
Position of Parts in Body
S13
S15
O3
T10
R7
(*3)
(*4)
(*3)
(*4)
P11
P16
P12
P15
S10
R6
T12
S17
P14
O2
T9
P18
P10
(*2)
(*1)
S14
P9
P17
S19
(*1)
R5
(*2)
S9
S11
O
O
O
O
O
O
O
O
2
3
4
5
6
7
8
9
P 9
P 10
P 11
P 12
P 13
P 14
P 15
P 16
P 17
P 18
S16
P13
O5
Outer Rear View Mirror (LH)
Outer Rear View Mirror (RH)
Occupant Classification ECU
Occupant Classification Sensor Front LH
Occupant Classification Sensor Rear LH
Occupant Classification Sensor Front RH
Occupant Classification Sensor Rear RH
Power Window Regulator Motor (Front LH)
Power Window Regulator Motor (Front RH)
Power Window SW (Front Passenger’s Side)
Pretensioner (LH)
Pretensioner (RH)
Power Window SW (Front Passenger’s Side)
S18
O4
O6
S12
R
R
R
R
R
4
5
6
7
8
S 9
S 10
S 11
S 12
S 13
S 14
S 15
S 16
S 17
S 18
S 19
O7
O8
O9
R8
R4
Rear Combination Lamp (LH)
Rear Combination Lamp (RH)
Rear Window Defogger
Room Lamp (Center)
Room Lamp (Left Quarter)
Side Airbag Sensor (LH)
Side Airbag Sensor (RH)
Side Airbag Squib (LH)
Side Airbag Squib (RH)
Speaker (Front Door LH)
Speaker (Front Door RH)
Speaker (Rear LH)
Speaker (Rear RH)
Speed Sensor (Rear LH)
Speed Sensor (Rear RH)
T 9 Tweeter (LH)
T 10 Tweeter (RH)
T 12 Tire Pressure Warning Antenna and Receiver
39
SCION tC (EM0300U)
: Location of Connector Joining Wire Harness and Wire Harness
: Location of Ground Points
Engine Wire
Engine Room
Main Wire
EA
EA1
EB
EC
ED
EE
40
SCION tC (EM0300U)
Memo
41
SCION tC (EM0300U)
Engine Room
Main Wire
IE3
IE4
Instrument
Panel Wire
Engine Wire
Instrument Panel
Wire Assembly
Roof Wire
IA1
Front Door
RH Wire
IE1
IE2
Sensor Wire
Floor No.2 Wire
IB1
Front Door
LH Wire
IC1
Floor Wire
IC2
ID1
IB2
Floor Wire
Console Box Wire
Floor No.2 Wire
IH
IF
IG
42
SCION tC (EM0300U)
G
Engine Room
Main Wire
Instrument
Panel Wire
Engine Wire
Instrument Panel
Wire Assembly
IG1
IH1
Roof Wire
IH2
II1
IJ1
Front Door
RH Wire
Sensor Wire
II2
IM1
IK1
Front Door
LH Wire
Floor No.2 Wire
IF1
Floor Wire
Floor Wire
IL1
Console Box Wire
Floor No.2 Wire
43
SCION tC (EM0300U)
Roof Wire
BA1
BA2
Instrument
Panel Wire
Front Door
RH Wire
Floor No.2
Wire
Front Seat
RH Wire
BK
Front Door
LH Wire
Floor Wire
Back Door
Wire
BI
BJ
BB1
Floor No.3 Wire
44
SCION tC (EM0300U)
SYSTEM CIRCUITS H
2007 tC
ELECTRICAL WIRING DIAGRAM
SYSTEM CIRCUITS
ABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Back Door Opener . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Back–Up Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cigarette Lighter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combination Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door Lock Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronically Controlled Transmission and A/T Indicator . . . . . . . . . . . . . .
Engine Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Immobiliser System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Wiper and Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Headlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Illumination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Key Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Light Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multiplex Communication System (CAN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Window (w/ Jam Protection) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Window (w/o Jam Protection) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radiator Fan and Condenser Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Window Defogger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Control Mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat Belt Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sliding Roof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stop Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taillight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Pressure Warning System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signal and Hazard Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wireless Door Lock Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Page
136
178
166
114
90
54
154
170
130
104
124
56
66
92
72
152
52
82
78
158
160
70
156
46
96
102
176
164
94
162
122
118
145
50
88
86
142
74
108
45
SCION tC (EM0300U)
Power Source
B
2
2
1
2
W
W
120A ALT
2
1
1
2
2
2
LG
W
30A RDI
7. 5A ALT–S
2
1
1
2
2
R
2
L
30A CDS
10A ETCS
2
1
1
2
2
2
W
B
50A ABS NO. 1
15A IGN
2
1
1
2
2
B
2
GR
40A ABS NO. 2
10A HORN
2
1
1
2
2
P
40A HTR
10A TURN–HAZ
1
L
2
1
2A
2
2
B
1
B
G
G2
Generator
10A OBD2
1
2
2
R
R
30A AM2
1
2
2
V
1
2
20A EFI
V
2
B
10A ECU–B
1
2
2
L
2
1
2
2
SB
7. 5A DOME
30A DCC
FL MAIN
3. 0W
1
2
G
L
2
20A RAD NO. 1
2
1
Battery
40A MAIN
2
B
B
B
2
2
3
5
1
2
H–LP Relay
46
SCION tC (EM0300U)
G
2
2
GR
10A TAIL
W
1
1G
W
7. 5A PANEL
T–LP Relay
30A POWER
PWR Relay
2 AM1
1
1F
ACC 3
GR
5
1F
IG1 4
Y
ST1 1
G
IG2 6
L
ST2 8
B
25A AM1
15A CIG
7. 5A ACC
4
1F
15A IG2
R
7 AM2
W
10A MET IG2
I5
Ignition SW
3 IE4
2
1
7 IH1
7. 5A RR DEF I/UP
LG
30A DEF
3
20A FL DOOR
DEF Relay
1
20A FR DOOR
7. 5A
ST
20A DOOR
R
2
15A FR FOG
7. 5A ECU–IG
Y
3
Y
20A S/ROOF
30A FR WIP
10A STOP
15A FR WSH
1
2
2
15A ACC SOCKET
R
10A GAUGE
5
3
2
1
10A H–LP LH LO
G
2
1
10A A/C
2
2
GR
3
1F
IG1 Relay
10A H–LP RH LO
1
2
2
Y
Noise Filter
10A H–LP LH HI
1
2
2
P
17 1E
7 1M
W–B
2
W–B
G
IH
10A H–LP RH HI
IF
47
SCION tC (EM0300U)
Power Source
: Parts Location
Code
See Page
G2
Code
34
I5
See Page
Code
37
: Relay Blocks
Code
See Page
2
22
Engine Room R/B (Engine Compartment Left)
3
23
Engine Room R/B No.2 (Inside of the Engine Room R/B Box)
Code
1E
See Page
24
1G
24
Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
1M
25
2A
22
Engine Wire and Engine Room J/B (Engine Compartment Left)
1F
Code
See Page
IE4
42
Engine Room Main Wire and Instrument Panel Wire (Behind of the Combination Meter)
IH1
43
Engine Wire and Instrument Panel Wire (Cowl Side Panel RH)
: Ground Points
Code
See Page
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
48
SCION tC (EM0300U)
See Page
Memo
49
SCION tC (EM0300U)
Starting
LG
ACC
W
2 AM1
7 IH1
3
IG1
1
ST1 1
G
7. 5A
ST
R
7 AM2
IG2
ST2 8
2
B
W
3
I5
Ignition SW
Y
B
3 IH1
P
Y
N
(M/T)
B
R
25A
AM1
Y
P1
1 IE4
4
L
(M/T)
(A/T)
1 1F
5
B
1 EA1
6 IE1
L
3 IE4
B
Y
1 1G
(M/T)
3
(M/T)
(A/T)
3
R
W
1
5
C5
Clutch
Start SW
1
ST
Relay
2
2
2
B
3
2
3
120A
ALT
3
4 IE1
30A
AM2
B
W–B
1
1
(M/T)
2
(M/T)
2
10 IH2
B
BR–W
A
FL MAIN
3. 0W
J9
Junction Connector
A
B–R
1
B
M
W–B
1 A
Battery
S 4(A), S 5(B)
Starter
IH
50
SCION tC (EM0300U)
(M/T)
4 IH1
R
B
2
: Parts Location
Code
See Page
Code
See Page
Code
See Page
C5
36
J9
37
S4
A
35
I5
37
P1
35
S5
B
35
: Relay Blocks
Code
See Page
2
22
3
23
Code
See Page
1F
24
1G
24
Code
EA1
IE1
IE4
IH1
IH2
See Page
40
Engine Wire and Engine Room Main Wire (Inside of the Engine Room R/B Box)
42
43
: Ground Points
Code
IH
See Page
42
Cowl Brace RH
51
SCION tC (EM0300U)
Ignition
(IG)
(BAT)
15A
IGN
15A
IG2
2
2
IGF
2
IGF
2
+B
BR
BR
R
IGT
3
I4
Ignition Coil (No. 4)
IGT
3
1
V
IGF
2
4
GND
B
IGT
3
+B
BR
R
1
I3
4
GND
V
+B
BR
R
1
BR
4
GND
IGT
IGF
3
2
V
LG
2
P
W–B
2
4
GND
P
3
+B
R
V
2
1
R
BR
R
I1
5
IG2 Relay
1
2
BR
G
2
R
BR
I2
B
GR
B
GR
27 1B
G
P
B
LG
V
R
17
16
15
14
23
R
R
V
V
3 EA1
N1
Noise Filter
(Ignition)
1
IGT1
IGT2
IGT3
IGT4
IGF1
BR
W–B
E8
EE
EC
52
SCION tC (EM0300U)
: Parts Location
Code
See Page
Code
See Page
Code
See Page
E8
36
I2
35
I4
35
I1
35
I3
35
N1
35
: Relay Blocks
Code
2
See Page
22
Code
1B
See Page
24
Code
EA1
See Page
40
: Ground Points
Code
See Page
EC
40
Front Left Fender
EE
40
Left Side of the Cylinder Head
53
SCION tC (EM0300U)
Charging
B
W
(IG)
(IG)
10A
MET
IG2
7. 5A
ECU–IG
7 1S
LG
1 1M
B
4
Charge
J 1(A), J 2(B)
Junction
Connector
B
W
C6
Combination Meter
E8
Engine Control
Module
H A
ALT
15
10
F B
2
Y
1 2A
2
B
W
1
Y
1
Y
120A ALT
7. 5A ALT–S
2
2 IH2
5 EA1
2
W
B
4 A
3 A
2 A
1 A
1 B
L
M
IG
S
B
P
R
B
1 IH1
FL MAIN
3. 0W
Battery
IC Regulator
G 1(A), G 2(B)
Generator
54
SCION tC (EM0300U)
: Parts Location
Code
See Page
Code
See Page
Code
See Page
C6
36
G1
A
34
J1
A
37
E8
36
G2
B
34
J2
B
37
: Relay Blocks
Code
2
See Page
22
Code
1M
1S
2A
See Page
25
22
Engine Wire and Engine Room J/B (Engine Compartment Left)
Code
EA1
IH1
IH2
See Page
40
43
55
SCION tC (EM0300U)
Engine Control
(IG)
(BAT)
(BAT)
20A
EFI
15A
IG2
(ST)
7. 5A
ST
15A
IGN
2
2
2
2
R
3
2
Y
B
V
Y(A/T)
V
V
W
Y
G
B
G
Y
P
B
3 IH1
B
2
2
2
5
2
2
6 IE1
2
2
3
2
Y
EFI Relay
3
2
Y
(A/T)
P
Y
P
W–B
W–B
BR
BR
B
4
L
P
N
4 IE1
B
P1
Park/Neutral
Position SW
5
W–B
7 EA1
B
M
(M/T)
2
Fuel Pump
F9
Fuel Suction Pump
and Gage Assembly
4
1
(M/T)
L
BR
8 1A 11 1B
B
5 1E
Y
1
IG2 Relay
1
C5
Clutch Start SW
C/OPN Relay
2 EA1
5
(M/T)
2
(M/T)
V
2 1E 18 1E
GR
O
O
W
GR
G
G
9 1B 21 1E 27 1B
(M/T)
P
B
(A/T)
4 IH1
Y
Y
W–B
5
15 1A
17 1E
7 1M
1 1S
W–B
W–B
W–B
B(M/T)
B(A/T)
L
Y
Y
Y
Y
IH
IF
W–B
W–B
W–B
W–B
EC
56
SCION tC (EM0300U)
R
(BAT)
10A
STOP
∗ 1 : Shielded
∗ 2 : w/ Engine Immobiliser System
R
18 1B
Y
R
BR
V
W
W
Y
Y
B
B
3
2
4
1
G
B
F4
Fuel Injector (No. 4)
B
2 C
1 C
#2
#3
#4
GR
5 C
#1
L
W
6 C
NSW
L
L
Y
30 A
24 1E
L
F3
B
3 A
BATT
9 IH2
2
9 A
IGSW
+B2
12 1B
20 IE2
2
R
2 A
+B
2
1
L
1 A
MREL
2
1
Y
O
8 A
7 IH2
1
V
GR
E B
O
E B
10 IE1
1
G
9 IE1
J 4(A), J 5(B)
Junction
Connector
A A
O
F2
F1
B
V
P
GR
B
B
FAN NO. 2 Relay
G
S8
Stop Lamp SW
G
16 A
4 B
14 A
ST1–
STP
FANH
E 4(A), E 5(B), E 7(C), E 8(D)
E1
2
4
Y
Y
B(A/T)
R
L
A
A
A
A
Y
Y
J8
Junction
Connector
A
W
W–B
W–B
R
BR
R
(∗2)
A BR
A
BR
Y
W–B
6 IH1
(∗2)
+B
OX
BR
HT
W
B(M/T)
L
(∗1)
B
(∗1)
L
3
EOM
29 A
L
AF–
4
1
3 D
GR
+B
AF+
25 D
R
HT
E1
OX1B
2 D
Y
W
3
(∗1)
O
1
HT1B
(∗1)
31 D
H5
Heated Oxygen Sensor
(Bank 1 Sensor 2)
V1
VSV (Purge)
A1A–
21 D
2
1
A1A+
1 D
G
2
8 IH2
HA1A
A3
Air Fuel Ratio Sensor
(Bank 1 Sensor 1)
R
PRG
23 C
L
FC
25 A
B
STA
12 A
ED
57
SCION tC (EM0300U)
Engine Control
W
21
IC2
LG
BR
Y
R
R
2 IH1
W
R
Y
R
R
Y
R
R
R
3
20 IC2
T1
2
E2G
THA
4
1
15 IH2
M
2
M+
M–
VTA
VTA2
VC
2
1
6
4
5
A
A
20 D
19 D
A
V
BR
5 D
LG
B
8 D
W
(∗1)
R
G
L
R
W
G
VG
5
Y
1
E2
J7
Junction Connector
+B
Y
3
E2
Engine Coolant
Temp. Sensor
M1
Mass Air Flow Meter
E2
28 C
30 C
VG
29 C
E2G
32 D
THA
28 D
THW
E2
GE01
4 D
M+
M–
VTA1
VTA2
18 D
VC
E 4(A), E 5(B), E 7(C), E 8(D)
KNK1
26 D
OC1+
EKNK
13 D
30 D
OC1–
12 D
PSW
32 C
F/PS
ALT
32 B
10 D
G
29 D
Y
G2+
NE–
34 D
Y
NE+
27 D
1
15 1E
1
K1
Knock Control
Sensor (Bank 1)
2
P4
Power Steering
Oil Pressure SW
(∗1)
(∗1)
C3
Crankshaft
Position Sensor
2
C1
Camshaft
Position Sensor
2
1
(∗1)
G
1
R
Y
1
W
G
2
C2
Camshaft Timing
Oil Control Valve
R
(∗1)
P
L
(∗1)
G
R
(∗1)
3 1E
22
GSW2
A12
Airbag Sensor
Assembly Center
3
M
G1
Generator
BR
W
(∗1)
W–B
W–B
58
SCION tC (EM0300U)
∗ 1 : Shielded
∗ 3 : w/ Cruise Control
∗ 4 : w/o Cruise Control
BR
BR
W
BR
8 IC1
10 IC2
Y
G
1 BB1
7 BB1
3 BB1
BR
R
W–B
O
G
LG
4
2
9
6
1
8
3
P
P
5 BB1
G
W–B
8 BB1
LG
W
2 BB1
18 IC2
22 IC2
11 IC2
Vent Valve
BR
4 BB1
Y
LG
A 7(A), (B)
M
AC1
Leak Detection Pump
10 A (∗3)
10 B (∗4)
24 B
ACT
L1
Canister Pump Module
L
P
25 B
Canister
Pressure Sensor
G
LG
16 A
16 B
LG
ACT
31 A
5 A
6 A
VPMP
MPMP
AC1
PPMP
E 4(A), E 5(B), E 7(C), E 8(D)
SPD
E02
B
B
8 B
B
1 1E
B
BR
V
BR
V
J7
Junction
Connector
V
6 D
P
E01
7 D
B
BR
E03
4 C
W–B
ME01
3 C
W–B
E04
7 C
V
IGF1
23 D
LG
IGT4
14 D
B
IGT3
15 D
P
IGT2
16 D
G
IGT1
17 D
8 1C
V
P
V
B
V
LG
V
3
2
3
2
3
2
3
2
IGT
IGF
IGT
IGF
IGT
IGF
IGT
IGF
C A
C A
C A
J 4(A), J 5(B)
Junction
Connector
I4
Ignition Coil
(No. 4)
BR
I3
Ignition Coil
(No. 3)
BR
I2
Ignition Coil
(No. 2)
C B
BR
I1
Ignition Coil
(No. 1)
L
BR
G
5 IH1
L
BR
BR
BR
W–B
W–B
BR
W–B
BR
W–B
EE
ED
59
SCION tC (EM0300U)
Engine Control
BR
BR
(BAT)
(BAT)
30A
DEF
120A
ALT
(IG)
10A
GAUGE
2
2
W
2
1 1G
VPA1
6
EP1
VCP2
3
5
VPA2
4
EP2
2
10A TAIL
7. 5A RR DEF I/UP
VCP1
T–LP Relay
A10
1
IF1
5
IF1
1
IF1
6
IF1
2
11 1M
R
W
B
G
L
4
BR
10 1E
DEF
Relay
IF1
3
IF1
L
W
BR
P
V
R
O
B
BR
26 A
18 A
20 A
27 A
19 A
21 A
3 B
15 A
VCPA
VPA
EPA
VCP2
VPA2
EPA2
ELS3
7 A
+BM
ELS1
E 4(A), E 5(B), E 7(C), E 8(D)
EFII
B
CANH
33 B
W
CANL
34 B
W
G
TC
18 A
B
R
TACH
1 B
D B
B B
B
B A
D A
G
7
W
30 B
B
6
EFIO
THWO
14 B
J 4(A), J 5(B)
Junction
Connector
O
IMO
15 B
GR
IMI
16 B
W
G
B
T8
Transponder Key
ECU
G
R
L
L
BR
BR
BR
BR
BR
BR
W–B
W–B
60
SCION tC (EM0300U)
(BAT)
BR
(BAT)
10A
ETCS
(IG)
10A
MET
IG2
10A
OBD2
2
(BAT)
10A
ECU–B
2
2
2
1 1M
2
V
L
G
2
B
W
W
B
5 IE1
30 1B
LG
12 IE1
V
BR
2 1S
W–B
Tachometer
Speedometer
17
21
27
1
BR
BR
8 1E
L
4
R
CG
5
Malfunction Indicator Lamp
SG
9
C6
Combination Meter
TAC
13
Power Circuit
G
6
CANH
B
TC
CANL
3
B
W
14
BAT
12 1D
B
16
G
D4
Data Link
Connector 3
BR
P
4
25
O
G
W
G
15 IE2
B
O
G
R
L
BR
BR
BR
W–B
61
SCION tC (EM0300U)
Engine Control
B
W
B
B
W
W
2 A
1 A
J13(A), J14(B), J15(C)
Junction Connector
ST Plug
2
1
2 B
1 B
1 C
W
B
W–B
3
A
J6
Junction
Connector
A
W–B
O
S1
26
FL+
FL–
9
8
31
30
11
12
33
34
W
R
P
L
LG
G
Y
B
SP1
FR+
FR–
RL+
RL–
RR+
RR–
IF
Speed Sensors
62
SCION tC (EM0300U)
System Outline
The engine control system utilizes a microcomputer and maintains overall control of the engine, transaxle etc. An outline of
the engine control is given here.
1. Input Signals
(1) Engine coolant temp. signal circuit
The engine coolant temp. sensor detects the engine coolant temp. and has a built–in thermistor with a resistance, which
varies according to the engine coolant temp.. The engine coolant temp. which is input into TERMINAL THW of the
engine control module as a control signal.
(2) Intake air temp. signal circuit
The intake air temp. sensor is installed in the mass air flow meter and detects the intake air temp. which is input as a
control signal to TERMINAL THA of the engine control module.
(3) Oxygen density signal circuit
The oxygen density in the exhaust emission is detected by the heated oxygen sensor and input as a control signal to
TERMINAL OX1B of the engine control module.
(4) RPM signal circuit
Camshaft position and crankshaft position are detected by the camshaft position sensor and crankshaft position sensor.
Camshaft position is input as a control signal to TERMINAL G2+ of the engine control module, and engine RPM is input
into TERMINAL NE+.
(5) Throttle position signal circuit
The throttle body assembly detects the throttle valve opening angle as a control signal, which is input into TERMINALS
VTA1 and VTA2 of the engine control module.
(6) Vehicle speed circuit
The vehicle speed sensor detects the vehicle speed and inputs a control signal to TERMINAL SPD of the engine control
module.
(7) Battery signal circuit
Voltage is constantly applied to TERMINAL BATT of the engine control module. With the ignition SW turned on, the
voltage for engine control module start–up power supply is applied to TERMINAL +B of the engine control module via
the EFI relay.
(8) Stop lamp SW signal circuit
The stop lamp SW is used to detect whether the vehicle is braking or not and the signal is input into TERMINAL STP of
the engine control module as a control signal.
(9) Starter signal circuit
To confirm whether the engine is cranking, the voltage is applied to the starter motor during cranking is detected and the
signal is input into TERMINAL STA of the engine control module as a control signal.
(10) Engine knock signal circuit
Engine knocking is detected by knock control sensor and the signal is input into TERMINAL KNK1 as a control signal.
(11) Air fuel ratio signal system
The air fuel ratio is detected by air fuel ratio sensor and input as a control signal into TERMINAL A1A+ of the engine
control module.
63
SCION tC (EM0300U)
Engine Control
2. Control System
∗ SFI system
The SFI system monitors the engine condition through the signals input from each sensor to the engine control module.
And the control signal is output to TERMINALS #1, #2, #3 and #4 of the engine control module to operate the fuel
injector (Inject the fuel). The SFI system controls the fuel injection operation by the engine control module in response to
the driving conditions.
∗ ESA system
The ESA system monitors the engine condition through the signals input to the engine control module from each sensor.
The best ignition timing is decided according to this data and the memorized data in the engine control module and the
control signal is output to TERMINALS IGT1, IGT2, IGT3, IGT4. This signal controls the igniter (Ignition coil) to provide
the best ignition timing for the driving conditions.
∗ Heated oxygen sensor heater control system
The heated oxygen sensor heater control system turns the heater on when the intake air volume is low (Temp. of
exhaust emissions is low), and warms up the heated oxygen sensor to improve detection performance of the sensor.
The engine control module evaluates the signals from each sensor, and outputs current to TERMINAL HT1B to control
the heater.
3. Diagnosis System
With the diagnosis system, when there is a malfunction in the engine control module signal system, the malfunctioning
system is recorded in the memory. The malfunctioning system can be found by reading the code displayed by the
malfunction indicator lamp.
4. Fail–Safe System
When a malfunction has occurred in any system, if there is a possibility of engine trouble being caused by continued control
based on the signals from that system, the fail–safe system either controls the system by using data (Standard values)
recorded in the engine control module memory or else stops the engine.
: Parts Location
Code
See Page
A3
34
Code
E8
See Page
D
Code
36
See Page
J7
37
A
36
F1
34
B
36
F2
34
J13
A
32, 37
A10
36
F3
34
J14
B
32, 37
A12
36
F4
34
J15
C
32, 37
C1
34
F9
38
K1
35
C2
34
G1
34
L1
38
C3
34
H5
34
M1
35
C5
36
I1
35
P1
35
C6
36
I2
35
P4
35
D4
36
I3
35
S1
35
E2
34
I4
35
S8
37
A7
J8
37
E4
A
36
J4
A
37
T1
35
E5
B
36
J5
B
37
T8
37
E7
C
36
37
V1
35
J6
: Relay Blocks
Code
See Page
2
22
3
23
64
SCION tC (EM0300U)
Code
See Page
1A
24
Floor Wire and Instrument Panel J/B (Lower Finish Panel)
1B
24
24
24
25
1C
1D
1E
1G
1M
1S
Code
EA1
IC1
IC2
IE1
IE2
IF1
IH1
IH2
BB1
See Page
40
42
42
43
Instrument Panel Wire and Sensor Wire (Instrument Panel Brace LH)
43
44
Floor Wire and Floor No.3 Wire (Center Floor Pan Center)
: Ground Points
Code
See Page
EC
40
Front Left Fender
ED
40
Front Left Side of the Cylinder Head
EE
40
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
65
SCION tC (EM0300U)
Engine Immobiliser System
(BAT)
(IG)
20A
EFI
15A
IG2
2
21 1E
15 1C
G
LG
2
V
V
10 IE1
G
EFI Relay
V
2
5
1
9 IE1
O
2
O
V
O
V
LG
8 A
3 A
9 A
MREL
2
BATT
IGSW
3
2
E 4(A), E 5(B), E 7(C), E 8(D)
2
15 B
O
GR
IMO
16 B
P
IMI
6 D
B
E02
7 D
BR
E01
4 C
W–B
E03
3 C
W–B
ME01
7 C
W–B
E04
29 A
L
EOM
3 D
O
BR
W–B
E1
+B2
2 A
GR
+B
E B
E B
B
B
1 A
A A
B
BR
18 1E
J 4(A), J 5(B)
Junction
Connector
11 1B
P
L
BR
6 IH1
A
A
BR
BR
W–B
W–B
A
W–B
BR
J8
Junction
Connector
EC
ED
EE
66
SCION tC (EM0300U)
ED
J7
Junction
Connector
GR
O
(BAT)
10A
ECU–B
D4
Data Link
Connector 3
2
2
T7
SIL
7
V
Transponder Key Coil
W
LG
30 1B
3 1S
ANT1
ANT2
CODE
TXCT
GND
5
7
12 1H
7 1E
VC5
4
1
12
13
CODE
TXCT
AGND
J 4(A), J 5(B)
Junction
Connector
11
VC5
L
8
A B
W
P
2
V
LG
D
R
E A
Y
D
J3
Junction
Connector
W
R
1
IG
+B
9
D
T8
Transponder Key ECU
3
14
O
B
BR–W
GR
KSW
B
10
CTY
4
E B
23 1E
27 A (∗1)
27 B (∗2)
21 1A
1 A (A/T)
1 B (M/T)
J6
Junction
Connector
A
W–B
W–B
1
D9
Door Courtesy SW
(Driver' s Side)
BR
O
A
A
IH
6 1C
A
J9
Junction
Connector
A
2 A (A/T)
2 B (M/T)
BR
B
W–B
GND
12 A (∗1)
12 B (∗2)
26 1E
U 1(A), (B)
Unlock Warning SW
Security
Indicator
Lamp
A A
A 7(A), (B)
SECU
W–B
O
J 1(A), J 2(B)
Junction
Connector
IND
6
BR
EFIO
GR
GND
EFII
7
IF
67
SCION tC (EM0300U)
: Parts Location
Code
A7
See Page
Code
See Page
Code
See Page
A
36
E8
D
36
J7
37
B
36
J1
A
37
J8
37
D4
36
J2
B
37
J9
37
D9
38
37
T7
37
T8
J3
E4
A
36
J4
A
37
E5
B
36
J5
B
37
E7
C
36
J6
37
U1
37
A
37
B
37
: Relay Blocks
Code
2
See Page
22
Code
See Page
1A
24
1B
24
1C
1E
24
1H
1S
25
Code
See Page
IE1
42
IH1
43
: Ground Points
Code
See Page
EC
40
Front Left Fender
ED
40
EE
40
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
68
SCION tC (EM0300U)
Memo
69
SCION tC (EM0300U)
Multiplex Communication System – CAN
10
B
CANH
9
W
CANL
2 A
1 A
ST Plug
2
1
1 B
B
CANL
6
CANH
A
J6
Junction
Connector
14
1 C
W–B
2 B
W
3
J13(A), J14(B), J15(C)
Junction
Connector
E5
Engine Control
Module
A
W–B
D4
Data Link
Connector 3
IF
70
SCION tC (EM0300U)
System Outline
Multiplex communication system (CAN) uses a serial communication protocol and communicates with a differential voltage.
In this network system, TERMINALS CANH and CANL are used for communication between the ECUs and sensors, and
excellent data communication speed and communication error detecting facility are provided.
: Parts Location
Code
See Page
D4
36
E5
36
Code
See Page
J6
J13
A
Code
See Page
37
J14
B
32, 37
32, 37
J15
C
32, 37
: Ground Points
Code
IF
See Page
42
Cowl Brace LH
71
SCION tC (EM0300U)
B
B
G
Headlight
2
2
2
3
1
G
H–LP
Relay
1
1
10A
H–LP
LH HI
G
1
2
1
10A
H–LP
RH HI
10A
H–LP
LH LO
10A
H–LP
RH LO
5
2
2
2
2
2
2
2
2
2
2
2
1
GR
R
2
H4
Headlamp (RH Low)
1
H2
Headlamp (LH Low)
1
11 IE1
2
GR
2
P
Y
H3
Headlamp (RH High)
B
GR
H1
Headlamp (LH High)
P
2
1
2
40A
MAIN
4 1J
16 1C
O
12 1C
W–B
34 1B
W–B
16 1B
Beam
4
1E
C6
Combination Meter
25 1B
B
2
R
30
B
R
31
R
1
14
7
HU
HL
H
T
EL
OFF
Tail
Head
Low
Flash
13
16
W–B
V
W–B
High
W–B
Dimmer SW
V
Light
Control SW
HF
HEAD
17
FL MAIN
3. 0W
8
HRLY
C7
Combination SW
I6
Integration Relay
B
2
Battery
12 1E
IF
17 1E
W–B
W–B
W–B
7 1M
IH
72
SCION tC (EM0300U)
EC
EB
: Parts Location
Code
See Page
Code
See Page
C6
36
H2
34
C7
36
H3
34
H1
34
H4
34
Code
I6
See Page
37
: Relay Blocks
Code
2
See Page
22
Code
1B
See Page
24
1C
1E
24
1J
1M
25
Code
IE1
See Page
42
: Ground Points
Code
See Page
EB
40
Front Right Fender
EC
40
Front Left Fender
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
73
SCION tC (EM0300U)
Turn Signal and Hazard Warning Light
(BAT)
(IG)
10A
GAUGE
10A
TURN–HAZ
2
2
1
P
IG
FLASH Relay
32 1B
LL
28 1A
13 1S
16 1S
Y
C B
J 1(A), J 2(B)
Junction Connector
G
Y
32
33
E A
2
F A
F A
W–B
J6
Junction
Connector
W–B
D B
C B
5 IH1
BR
C A
J 4(A), J 5(B)
Junction Connector
BR
W–B
1
20 IB2
J11(A), J12(B)
Junction
Connector
C6
Combination Meter
Turn RH
Side Turn
Signal Lamp
6
Turn LH
Y
Turn
1
6
O2
Outer Rear View
Mirror (LH)
W–B
E A
Y
G
F A
12 IB2
W–B
Turn
R5
1
F A
4
W–B
1
2
R4
2
T5
T4
F A
4
A B
BR
Y
G
A A
G
G
27 1A
LG
31 1B
2
J11(A), J12(B)
Junction Connector
14 1B
LR
3
G
+B
4
B
A
J7
Junction
Connector
B
BR
W–B
A
W–B
W–B
A
J10
Junction
Connector
EC
EB
BI
74
SCION tC (EM0300U)
ED
FLASH Relay
11 1S
12 1S
28 1E
17 1E
1
3
G
Turn
Signal
SW
O
TL
TB
7
7 1M
W–B
17 1S
W–B
GND
6
W–B
ER
5
BR
EL
8
GR
EHW
TR
LH
RH
G
C7
Combination SW
25 A (∗1)
25 B (∗2)
A 7(A), (B)
II1
G
6
Side Turn
Signal Lamp
1
2
HAZ
Hazard SW
GND
12 A (∗1)
12 B (∗2)
W–B
2
W–B
O3
Outer Rear View
Mirror (RH)
W–B
II2
W–B
2
A
A
W–B
A
W–B
J9
Junction
Connector
W–B
W–B
IH
IF
75
SCION tC (EM0300U)
: Parts Location
Code
A7
See Page
A
36
B
Code
J5
See Page
B
Code
See Page
37
O2
39
36
J6
37
O3
39
C6
36
J7
37
R4
39
C7
36
J9
37
R5
39
J10
38
T4
35
T5
35
J1
A
37
J2
B
37
J11
A
38
J4
A
37
J12
B
38
: Relay Blocks
Code
2
See Page
22
Code
See Page
1A
24
1B
24
1E
24
1M
1S
25
Code
See Page
IB2
42
Front Door LH Wire and Instrument Panel Wire (Left Kick Panel)
IH1
43
43
Front Door RH Wire and Instrument Panel Wire (Right Kick Panel)
II1
II2
: Ground Points
Code
See Page
EB
40
Front Right Fender
EC
40
Front Left Fender
ED
40
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
BI
44
Quarter Panel LH
76
SCION tC (EM0300U)
Memo
77
SCION tC (EM0300U)
Interior Light
(IG)
(BAT)
7. 5A
ECU–IG
10A
ECU–B
V
2
3
2 1S
Door
V
30 1B
C6
Combination Meter
V
2
L
14
SIG
LSDI
RDA
7 A
L1
PRG
6 A
UL1
UL1
12
16
16 1H
7 1H
L
B
O
L
6 1H
LG
5 1H
B
GR
4 1H
R
UL2
14
(∗5)
12 1H
D
1
W–B
GND
2
W–B
W–B
J6
Junction
Connector
J10
Junction
Connector
IF
BI
78
SCION tC (EM0300U)
A
A
W–B
A
A
D12
Door Lock Assembly
(Front Passenger' s Side)
II2
W–B
20 IB2
A
(∗5)
8
W–B
+B
V
Key Unlock
Key Lock
D11
Door Lock Assembly
(Driver' s Side)
Key Unlock
2 A (∗5)
3 B (∗6)
5
W–B
PRG
II1
6
W–B
RDA
7
(∗5)
LG
10
II1
(∗5)
V
9
Key Lock
Unlock
1 A (∗5)
5 B (∗6)
8
14 IB2
G
15 IB2
W–B
3
5
II1
7
2
D8
Door Control
Receiver
V
12 IC2
9
3 A
6 B
D13(A), D14(B)
Door Lock
Control SW
Lock
13 IC2
B
14 IC2
GR
G
D
II1
B
10
L
J3
Junction
Connector
L2
18 A
10
(∗5)
6
ECUB
P
ECUB
I 6(A)
Integration Relay
5
5 A
IH
J9
Junction
Connector
∗
∗
∗
∗
1
2
5
6
: w/ Engine Immobiliser System
: w/o Engine Immobiliser System
: w/ Jam Protection
: w/o Jam Protection
B
(∗2)
I 6(A)
Integration Relay
DCTY
PCTY
BCTY
1
26
20
23
7 1M
21 1A
14 1C
7 1A
ILL
7
1 1K
2 1K
27 1E
O
(∗1)
L
V
W–B
2
1
I7
Ignition Cylinder
Lamp
17 1E
GND
L
O
W–B
W–B
O
V
(∗2)
O
V
IJ1
L
18
L
8 BA2
W–B
LG
(∗1)
V
Courtesy SW
1
B5
Back Door Lock Assembly
D9
Door Courtesy SW
(Driver' s Side)
1
D10
Door Courtesy SW
2
W–B
1
IH
IF
BK
79
SCION tC (EM0300U)
W–B
W–B
V
(∗1)
O
L
W–B
D7
Diode (Room Lamp)
8 A
4 B
4 A (∗3)
3 B (∗4)
80
SCION tC (EM0300U)
1
2
L
LG
4 1P
L
O
R
R
5 1K
N2
Noise Filter (DOME)
1
R8
OFF
ON
DOOR
R
B
(∗1)
SB
7. 5A
DOME
R
3
W–B
OFF
ON
2
L
6
M 2(A), M 3(B)
Map Lamp
DOOR
2
W–B
R7
Room Lamp (Center)
Ignition Key
Cylinder Lamp
3 1P
L
(∗1)
O
T7
Interior Light
(BAT)
∗ 3 : w/ Sliding Roof
∗ 4 : w/o Sliding Roof
2
2
13 1B
5 1P
(∗2)
B
1 IC2
3 A (∗3)
1 B (∗4)
2
1
1
2
V
A
J6
Junction
Connector
A
IF
System Outline
The interior light is controlled by the integration relay. This system has following features.
Illuminated Entry System
∗ When a door is unlocked through a key operation or transmitter operation, or if a door is opened or closed, the illuminated
entry system turns ON the room lamp (Center), map lamp and the ignition key cylinder lamp.
∗ If the ignition switch is turned to the ACC or ON position or if all doors are locked during the 15 seconds in which these
lights are ON, they will immediately turn OFF.
: Parts Location
Code
See Page
Code
See Page
Code
See Page
B5
38
D13
A
38
M2
A
38
C6
36
D14
B
38
M3
D7
38
I6
A
37
N2
B
38
37
D8
38
I7
37
R7
39
D9
38
J3
37
R8
39
D10
38
J6
37
T7
37
D11
38
J9
37
D12
38
J10
38
: Relay Blocks
Code
2
See Page
22
Code
See Page
1A
24
1B
24
24
24
Roof Wire and Instrument Panel J/B (Lower Finish Panel)
25
1C
1E
1H
1K
1M
1P
1S
Code
See Page
IB2
42
IC2
42
43
IJ1
43
Floor No.2 Wire and Instrument Panel Wire (Right Kick Panel)
BA2
44
Back Door No.1 Wire and Floor Wire (Back Window Upper Frame LH)
II1
II2
: Ground Points
Code
See Page
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
BI
44
Quarter Panel LH
BK
44
Left Side of the Back Door Panel
81
SCION tC (EM0300U)
Illumination
(IG)
10A
GAUGE
7. 5A
PANEL
T–LP
Relay
19
1 1G
6 1D
9 1P
7 1P
8 1Q
W
LG
I 6(A)
Integration
Relay
TRLY
TAIL
13 A
H A
2
2
J 4(A), J 5(B)
Junction
Connector
O
(∗2)
O
(∗2)
V
(∗2)
G
(A/T)
GR
LG
120A
ALT
(∗1)
BR
F B
1
II1
Tail
Head
C7
Combination SW
4
16
FL MAIN
3. 0W
1
2
2
12 1E
W–B
W–B
Battery
A
17 1E
A
IF
J9
Junction Connector
W–B
W–B
W–B
A
IH
A
7 1M
IH
82
SCION tC (EM0300U)
(A/T)
(∗1)
BR–Y
W–B
W–B
II2
10
EAU
1
2
2
1
IL+2
Steering Pad SW
OFF
A9
EL
F5
Front Console Illumination
H
D13
B
Light
Control SW
T
GR
14
2
S7
Spiral Cable
1
(IG)
∗
∗
∗
∗
1
2
3
4
: w/ Front Console Illumination
: w/ Audio Steering Pad SW
: w/ Cruise Control
: w/o Cruise Control
(BAT)
10A
MET
IG2
10A
ECU–B
2
1 1M
V
2
30 1B
2 1Q
6 1P
8 1P
R
LG
V
2 1S
6
4
3
C6
Combination Meter
SWG
Illumination
10 A
ILL
ILL–
Rheostat
5 B
1
BR
11
W
F A
C A
BR
B
J7
Junction
Connector
5 IH1
H B
H B
J 4(A), J 5(B)
Junction Connector
C B
B
BR
BR
ILL–
17 A (∗3)
17 B (∗4)
6 C
Power Circuit
W
ILL+
R 2(A), R 3(B), R 9(C)
Radio Receiver Assembly
19 A (∗3)
19 B (∗4)
W
A 7(A), (B)
ODO/TRIP
Illumination
G
O
R
(∗2)
O
(∗2)
ED
83
SCION tC (EM0300U)
Illumination
: Parts Location
Code
A7
See Page
A
36
B
Code
See Page
F5
Code
36
R2
See Page
A
37
36
I6
A
37
R3
B
37
A9
36
J4
A
37
R9
C
37
C6
36
J5
B
37
C7
36
J7
37
D13
38
J9
37
: Relay Blocks
Code
2
See Page
22
Code
1B
1D
1E
1G
See Page
24
24
24
25
1M
1P
1Q
1S
Code
IH1
II1
II2
See Page
43
43
: Ground Points
Code
See Page
ED
40
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
84
SCION tC (EM0300U)
S7
37
Memo
85
SCION tC (EM0300U)
J10
Junction
Connector
IH
IF
EC
EB
86
SCION tC (EM0300U)
D B
F A
BI
F A
A
A
W–B
L2
License Plate Lamp (LH)
F B
2
BJ
2
1
6 BA1
BK
BR
BR
BR
J11(A), J12(B)
Junction
Connector
BR
BR
BR
F B
L3
License Plate Lamp (RH)
BR
6
Tail
R5
Rear Combination
Lamp (RH)
Tail
R4
Rear Combination
Lamp (LH)
1
W–B
Tail
2
D A
W–B
W–B
7 1M
W–B
12 1E
J11(A), J12(B)
Junction
Connector
1
2
W–B
OFF
2
P3
Parking Lamp (RH)
2
D A
W–B
17 1E
EL
BR
I 6(A)
Integration
Relay
15 1B
W–B
Battery
H
W–B
14
W–B
FL MAIN
3. 0W
33 1B
W–B
C7
Combination SW
W–B
2
P2
Parking Lamp (LH)
BR
W
19
W–B
2
W–B
1
Light
Control SW
120A ALT
T
W–B
W–B
B
W
Taillight
1 1G
T–LP
Relay
10A
TAIL
TRLY
29 1A
13 A
TAIL
BR
6 BA2
6
Head
16
2
1
W–B
: Parts Location
Code
See Page
C7
I6
36
A
J10
J11
A
Code
J12
See Page
B
Code
See Page
38
P3
35
37
L2
38
R4
39
38
L3
38
R5
39
38
P2
35
: Relay Blocks
Code
2
See Page
22
Code
See Page
1A
24
1B
24
1E
24
1G
24
1M
25
Code
BA1
BA2
See Page
44
: Ground Points
Code
See Page
EB
40
Front Right Fender
EC
40
Front Left Fender
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
44
Quarter Panel LH
44
BI
BJ
BK
87
SCION tC (EM0300U)
W–B
F A
A
BI
W–B
D B
C10
Center Stop Lamp
W–B
6
L
L
J11(A), J12(B)
Junction
Connector
L
L
B A
B A
B B
B B
5
1
6
2
F A
J10
Junction
Connector
BK
88
SCION tC (EM0300U)
L
L
L
L
L
S8
Stop Lamp SW
2
N3
Noise Filter
(DEF and Stop)
Stop
R5
Stop
5
W–B
J11(A), J12(B)
Junction
Connector
W–B
R4
BR
Stop Light
(BAT)
10A
STOP
18 1B
1
12 1B
9 1A
7 BA2
2
: Parts Location
Code
See Page
C10
38
J10
J11
A
Code
J12
See Page
B
Code
See Page
38
R5
39
S8
37
38
N3
38
38
R4
39
Code
See Page
1A
24
1B
24
Code
BA2
See Page
44
: Ground Points
Code
See Page
BI
44
Quarter Panel LH
BK
44
89
SCION tC (EM0300U)
30 1A
3
90
SCION tC (EM0300U)
6
F A
R5
3
D B
F A
A
BI
J11(A), J12(B)
Junction Connector
2 1D
P
C A
Back–Up
P
J11(A), J12(B)
Junction
Connector
(M/T)
R4
A B
W–B
P
C A
P
1 IH2
Back–Up
1
B1
Back–Up Lamp SW
P1
Park/Neutral
Position SW
2
J10
Junction Connector
W–B
W–B
P
(A/T)
2
P
P
B
(A/T)
BR
Back–Up Light
(IG)
10A
GAUGE
15 1S
11 IH2
(M/T)
B
1
P
6
W–B
: Parts Location
Code
See Page
B1
34
J10
J11
A
Code
J12
See Page
B
38
38
P1
35
38
R4
39
Code
R5
See Page
39
Code
See Page
1A
24
1D
24
1S
25
Code
IH2
See Page
43
: Ground Points
Code
BI
See Page
44
Quarter Panel LH
91
SCION tC (EM0300U)
Front Wiper and Washer
(IG)
(IG)
30A
FR WIP
LG
2 1B
EW
Wiper Relay
2 1J
36 1B
V
C8
Combination SW
L
15A
FR WSH
1
WF
M
W1
Windshield
Washer
Motor
WF 11
Y
EW 2
W–B
Off
On
2
7
IE1
Y
INT2
B1
Washer SW
L
+S 16
B
1
IE1
B
+2 8
W
2
IE1
R
+1 7
G
3
IE1
G
W–B
HI
LO
INT
OFF
MIST
+B
+1
V
B
R
+2
+S
INT1
+B 17
1
4
3
2
+1
+2
S
B
M
Wiper SW
1 1J
17 1E
W–B
IF
92
SCION tC (EM0300U)
IH
5
W–B
7 1M
W–B
E
W2
Windshield Wiper Motor
EB
System Outline
With the ignition SW turned on, the current flows to TERMINAL 17 of the wiper and washer SW and TERMINAL 2 of the
windshield wiper motor through the FR WIP fuse. The current flows to TERMINAL 1 of the windshield washer motor through
the FR WSH fuse.
1. Low Speed Position
With the wiper and washer SW turned to LO position, the current flows from TERMINAL 17 of the wiper and washer SW to
TERMINAL 7 to TERMINAL 1 of the windshield wiper motor to TERMINAL 5 to GROUND and causes the windshield wiper
motor to run at low speed.
2. High Speed Position
With the wiper and washer SW turned to HI position, the current flows from TERMINAL 17 of the wiper and washer SW to
TERMINAL 8 to TERMINAL 4 of the windshield wiper motor to TERMINAL 5 to GROUND and causes the windshield wiper
motor to run at high speed.
3. INT Position
With the wiper and washer SW turned to INT position, the wiper relay operates and current flows from TERMINAL 17 of the
wiper and washer SW to TERMINAL 2 to GROUND. This activates the intermittent circuit and the current flows from
TERMINAL 17 of the wiper and washer SW to TERMINAL 7 to TERMINAL 1 of the windshield wiper motor to TERMINAL 5
to GROUND and the wiper operates. Intermittent operation is controlled by a condenser charge and discharge function in the
relay.
4. Washer Continuous Operation
With the wiper and washer SW pulled to WASHER position (Washer SW ON position), the current flows from the FR WSH
fuse to TERMINAL 1 of the windshield washer motor to TERMINAL 2 to TERMINAL 11 of the wiper and washer SW to
TERMINAL 2 to GROUND and causes the windshield washer motor to run and the window washer to spray. Simultaneously,
current flows from the FR WIP fuse to TERMINAL 17 of the wiper and washer SW to TERMINAL 7 to TERMINAL 1 of the
windshield wiper motor to TERMINAL 5 to GROUND, causing the wiper to function.
: Parts Location
Code
See Page
C8
36
Code
W1
See Page
35
Code
W2
See Page
35
Code
1B
1E
1J
1M
See Page
24
24
25
Code
IE1
See Page
42
: Ground Points
Code
See Page
EB
40
Front Right Fender
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
93
SCION tC (EM0300U)
W–B
O
O2
5
3
MH
MV
M
M
COM
4
5
II1
4
II1
3
5
MV
MH
M
3
G A
II1
94
SCION tC (EM0300U)
W–B
G A
J6
Junction
Connector
BR–Y
Select SW
VR
R
RH
VL
O
LH
HR
L
3
V
RH
HL
R
4
B
Operation SW
Right/
Down
Left/
Up
Down
Up
Right
Left
8
BR
J 4(A), J 5(B)
Junction
Connector
2
Y
LH
Y
5
LG
MH
R
V
B
7 IB2
L
LG
6 IB2
O3
LG
L
L
Remote Control Mirror
(ACC)
7. 5A
ACC
4 1S
O1
Outer Mirror SW
B
MV
M+
E
6
7
A
G B
A
4 IB2
M
COM
4
BR
IF
: Parts Location
Code
See Page
Code
See Page
Code
See Page
J4
A
37
J6
37
O2
39
J5
B
37
O1
37
O3
39
Code
1S
See Page
25
Code
See Page
IB2
42
II1
43
: Ground Points
Code
IF
See Page
42
Cowl Brace LH
95
SCION tC (EM0300U)
Power Window with Jam Protection
10A
GAUGE
6 1D
1 IB2
20 IB2
W–B
Y
W–B
11 IB2
VC
19
PLS
5
PLS2
15
SGND
12
BR
D
11
V
U
1
B
2
O
GND
P
10
LG
F B
B
IG
20
R
H A
J 4(A), J 5(B)
Junction Connector
LG
P
2 1M
P9
W
20A
FL
DOOR
(IG)
P
(BAT)
2
1
U
4
D
5
SSRB
M
W–B
P10
Power Window Regulator Motor
(Front LH)
A
J6
Junction Connector
W–B
A
IF
96
SCION tC (EM0300U)
3
PLS
6
PLS2
E
(BAT)
20A
FR
DOOR
P9
10 1H
MPX1
7
KOP
16
GR
BR
16 IB2
17 IB2
13 IB2
O
BR
G
B
P
PCT
6
1
II2
BR
II2
4
II2
12
2
B
1
PLS
PLS2
5
3
4
SGND
8
W–B
Y
VCC
BR
D
6
LG
U
7
L
GND
P12
Power Window SW
MPX1
R
PCT
G
11
O
B
P
3
2
1
U
5
SSRB
3
PLS
6
PLS2
E
W–B
II2
M
A
J9
Junction
Connector
A
P11
(Front RH)
W–B
2
4
D
IH
97
SCION tC (EM0300U)
(BAT)
(IG)
(BAT)
7. 5A
ECU–IG
20A
DOOR
10A
ECU–B
2
4
5
ALTB
SIG
V
2
PCTY
GND
26
20
1
9 1E
21 1A
14 1C
7 1M
O
ECUB
6
W–B
W–B
W–B
17 1E
W–B
KOF
L
DCTY
13
BR
Integration Relay
30 1B
BR
IJ1
1
D10
Door Courtesy SW
D9
Door Courtesy SW
(Driver' s Side)
L
18
1
IF
IH
98
SCION tC (EM0300U)
System Outline
1. Manual Up and Down Function
This function operates the window to open or close while the power window switch is being pulled up or pushed down
(Should be pulled up and down halfway for manual operation.). The window stops as soon as the switch is released.
2. One–Touch Auto Up and Down Function
”One–touch auto up and down function” enables the window of front doors to be fully opened or closed with a touch of the
power window switch.
3. Jam Protection Function
The jam protection function automatically stops the power window and moves it downward if a foreign object gets jammed in
the course of the window during one–touch auto–up operation.
4. Remote Control Function
The up and down operation of the front passenger door windows can be controlled by operating the power window master
switch.
5. Key–Off Operation Function
Within about 43 seconds when turn OFF the ignition SW or until the driver’s or passenger’s door is opened, this function
enables the door window operation with the power window master switch and/or the manual operation at each passenger’s
seat door.
∗ When the battery terminal or fuse is disconnected, the glass position of all door windows have to be reset to the initial
positions, one by one, with the power window control switch by following the procedure below:
A) Reconnect the battery terminal or fuse.
B) Turn ON the ignition switch.
C) Lower the window of each door halfway or more with the power window switch.
D) Then close the window fully with the power window switch.
Do not release the switch for at least 2 seconds after the window is fully closed.
: Parts Location
Code
See Page
D9
38
D10
Code
See Page
Code
See Page
J6
37
P11
39
P12
39
38
J9
37
J4
A
37
P9
39
J5
B
37
P10
39
: Relay Blocks
Code
2
See Page
22
Code
See Page
1A
24
1B
24
1C
1D
1E
24
1H
1M
25
Code
See Page
IB2
42
II2
43
IJ1
43
99
SCION tC (EM0300U)
: Ground Points
Code
See Page
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
100
SCION tC (EM0300U)
Memo
101
SCION tC (EM0300U)
Power Window without Jam Protection
(IG)
(BAT)
10A
GAUGE
120A
ALT
P17
2
W
2
E
W–B
SU
GR
5
SD
4
B
D
6
1 IB1
P
U
G
B
3
10
1
4 IB1
3 IB1
20 IB2
Y
1 1G
2
30A
POWER
W–B
GR
B
G
PWR
Relay
1
M
8
II2
9
II2
2
5
SD
SU
W–B
P
G
DOWN
UP
B
D
U
4
1
3
P
W–B
2 1H
P15
Power Window SW
11 1H
GR
7 1M
Y
17 1E
W–B
P18
Power Window
Regulator Motor
(Front LH)
J6
Junction
Connector
Y
G
A
IH
W–B
W–B
1
M
2
W–B
A
P16
Power Window
Regulator Motor
(Front RH)
IF
IF
102
SCION tC (EM0300U)
System Outline
1. Manual Down or Up Operation
When the power window master SW is pushed one stop, the motor rotates to open the window.
When the power window master SW is pulled up one step, the motor rotates in the opposite direction, to close the window.
All the other windows can be opened/closed as well, by the operation of the power window master SW or respective power
window SW.
When the window lock SW is pushed to the lock side, the ground circuit to the passenger’s window becomes open. As a
result, even if Open/Close operation of the passenger’s window is attempted, the current from TERMINAL E of the power
window master SW is not grounded and the motor does not rotate, to the passenger’s window can not be operated and
window lock occurs.
2. Auto Down Operation (Driver’s Window)
When the power window master SW is pushed two steps, the motor rotates to open the window automatically.
3. Stopping of Auto Down Operation (Driver’s Window)
Auto operation can be stopped in mid–course with switching power window master SW one step upward during the down
operation.
: Parts Location
Code
See Page
Code
See Page
J6
37
P16
39
P15
39
P17
39
Code
P18
See Page
39
: Relay Blocks
Code
2
See Page
22
Code
See Page
1E
24
1G
24
1H
24
1M
25
Code
IB1
IB2
II2
See Page
42
43
: Ground Points
Code
See Page
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
103
SCION tC (EM0300U)
Door Lock Control
(BAT)
(IG)
20A
DOOR
7. 5A
ECU–IG
4
5
ALTB
SIG
I 6(A)
Integration Relay
17 1E
12
L1
7 1M
26 1E
13 1H
UL1
UL3
10
14 1H
4 1H
LSWD
ACTD
18 A
20 A
2 A
L
9
W
KSW
1
P
GND
5 1H
W
BR
L
9 IB2
6 IB1
5 IB1
V
W
L
P
9
10
8
4
1
W–B
W–B
D11
Door Lock Assembly
(Driver' s Side)
W–B
W–B
W–B
W–B
20 IB2
A
BR
J6
Junction Connector
A
W–B
W–B
W–B
A
IH
M
2 A (∗1)
3 B (∗2)
7
W–B
Detection SW
P
14 IB2
Key Unlock
1 A (∗1)
5 B (∗2)
L
3 A
6 B
15 IB2
G
B
II1
Y
9
Unlock
Unlock
2 A (∗1)
1 B (∗2)
II1
D13(A), D14(B)
Lock
P
14 A (∗1)
5 B (∗2)
4 A
2 B
P 9(A), P17(B)
Lock
1 A (A/T)
1 B (M/T)
BR
U 1(A), (B)
Unlock Warning SW
2 A (A/T)
2 B (M/T)
10
Key Lock
18 IB2
B
V
19 IB2
L
GR
BR
R
B
W–B
W–B
L
IF
IF
104
SCION tC (EM0300U)
∗ 1 : w/ Jam Protection
∗ 2 : w/o Jam Protection
(BAT)
10A
ECU–B
2
V
2
30 1B
6
ECUB
I 6(A)
Integration Relay
16 1H
8 1H
ACT+
ACT–
DCTY
PCTY
2
3
26
20
17 1H
9 1H
21 1A
14 1C
UL2
16
7 1H
6 1H
DBKL
21 A
R
L2
14
L
J1
Junction Connector
L
O
W
R
LG
(∗1)
O
(∗1)
C
BR
C
4
1
1
1
2 IC2
L
M
IJ1
L
18
II2
L
10
D10
Door Courtesy SW
Key Lock
II2
D9
Door Courtesy SW
(Driver' s Side)
5
Key Unlock
6
11
R
V
II1
W
7
(∗1)
LG
II1
(∗1)
8
2
W–B
F7
Front Seat Inner Belt
(Driver' s Side)
D12
Door Lock Assembly
Buckle SW
(∗1)
W–B
8
W–B
1
W–B
W–B
II2
A
J9
Junction Connector
A
A
J10
Junction Connector
W–B
2
BI
IH
105
SCION tC (EM0300U)
Door Lock Control
System Outline
The door lock control is a system controlled by various signals input into the integration relay.
1. Manual Unlock Operation
When the door lock control SW of the driver’s or passenger’s side door is pushed to UNLOCK, the door unlocks.
2. Manual Lock Operation
When the door lock control SW of the driver’s or passenger’s side door is pushed to LOCK, the door locks.
3. Door Key Unlock Operation
∗ Unlock operation from driver’s side door
When the driver’s side door is unlocked once using the mechanical key, only the driver’s side door unlocks. If this
operation is repeated within 3 seconds, all the other doors also unlock.
4. Ignition Key Reminder Operation
Under condition that the ignition key remains inserted in the ignition key cylinder and driver’s side door is open, locking
operation with door knob of driver’s door is not effective but automatically unlocks the door. When the door is locked with the
manual door lock SW of driver’s door or door key SW of driver’s door, the door locks once but right after that, the door
unlocks automatically.
: Parts Location
Code
See Page
Code
See Page
D9
38
F7
D10
38
D11
38
J1
37
D12
38
J6
37
I6
A
Code
P9
A
39
37
P17
B
39
A
37
B
37
D13
A
38
J9
37
D14
B
38
J10
38
U1
: Relay Blocks
Code
2
See Page
22
Code
See Page
1A
24
1B
24
1C
1E
24
1H
1M
25
Code
IB1
IB2
IC2
II1
II2
IJ1
See Page
42
42
43
43
: Ground Points
Code
See Page
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
BI
44
Quarter Panel LH
See Page
38
106
SCION tC (EM0300U)
Memo
107
SCION tC (EM0300U)
Wireless Door Lock Control
B
W
GR
2
2
5
2
3
2
2
1
3
2
5
2
2
19
G
GR
2
G
P
2
T–LP Relay
H–LP Relay
HORN Relay
1
1 1G
B
B
GR
TRLY
I 6(A)
Integration Relay
25 1B
28 1B
2
9
W
J2
Junction
Connector
2
B
W
GR
B
W
2
KSW
12 1C
25 1E
D
HORN
4 A
B
HRLY
14 A
26 1E
40A MAIN
120A ALT
1
W
2
10A HORN
2
B
D
2
1
U 1(A), (B)
Unlock Warning SW
1
B
2
2 A (A/T)
2 B (M/T)
1 A (A/T)
1 B (M/T)
BR
FL MAIN
3. 0W
Battery
BR
108
SCION tC (EM0300U)
(BAT)
(IG)
20A
DOOR
7. 5A
ECU–IG
FLASH Relay
EHW
8
25
HAZ
4
5
ALTB
SIG
ACT–
DCTY
PCTY
BCTY
2
3
26
20
23
17 1H
9 1H
21 1A
14 1C
7 1A
O
W
R
4
1
M
1
D9
Door Courtesy SW
(Driver' s Side)
D11
Door Lock Assembly
(Driver' s Side)
M
L
18
II2
IJ1
8 BA2
1
2
Courtesy SW
L
4
10
LG
P
1
II2
B5
W
8
11
L
BR
6 IB1
D10
Door Courtesy SW
L
5 IB1
Detection
SW
W
9 IB2
D12
Door Lock Assembly
(Front Passenger' s
Side)
L
8 1H
R
2 A
V
ACT+
ACTD
20 A
W
LSWD
W
I 6(A)
Integration Relay
1
W–B
7
W–B
20 IB2
A
W–B
J6
Junction
Connector
A
A
W–B
BR
IF
BK
109
SCION tC (EM0300U)
(BAT)
10A
ECU–B
2
V
2
I 6(A)
Integration Relay
GND
W–B
7 1M
W–B
17 1E
W–B
30 1B
W–B
12 1H
V
1
R
6
J3
Junction
Connector
GR
ECUB
PRG
6 A
B
RDA
7 A
D
B
2
3
RDA
PRG
GND
1
+B
12 IC2
V
13 IC2
D8
14 IC2
GR
G
D
5
W–B
V
A
J10
Junction Connector
BI
IH
IF
110
SCION tC (EM0300U)
System Outline
Door lock control (Lock and unlock) and panic control (Theft alarm and flash) is performed by remote control, without the
ignition key inserted in the door key cylinder, using low–power electrical waves emitted by a transmitter.
1. Normal Operation
∗ Lock operation
When the lock SW on the transmitter is pressed, all the doors are locked.
∗ Unlock operation
When the unlock SW on the transmitter is pressed once, only the driver door is unlocked. When the unlock SW is pressed
again within 3 seconds, all the doors are unlocked.
2. Auto Lock Function
When the door is not actually opened within 30 seconds after the door has been unlocked by the unlock SW on the
transmitter, all the doors are automatically locked. If any of the following conditions are detected, the wireless door lock does
not function.
∗ Any door is opened.
∗ The ignition key is inserted into the ignition SW.
∗ When the lock detection SW of the door is locked.
3. Wireless Door Lock Stop Function
If any of the following conditions are detected, the wireless door lock does not function.
Lock operation
∗ When any door is open (Door courtesy SW on)
∗ The ignition key is inserted into the ignition SW (Unlock warning SW on)
∗ Ignition SW is on
Unlock operation
∗ Ignition SW is on
4. Visual Confirmation of Lock or Unlock
During lock operation, when the integration relay receives a lock signal from the door lock detection SW, the turn signal lamp
is flashed once. During unlock operation, when the integration relay receives an unlock signal from the door lock detection
SW, the turn signal lamp is flashed twice.
5. Remote Panic Operation
Panic will function when doors are locked or unlocked, open or closed. When the panic button (Transmitter) is pushed once,
map lamp, room lamp (Center) and ignition key cylinder lamp light up, and theft alarm and horn sounds and turn signal lamp,
headlamp and taillamp flash. Then, the panic, the lock or the unlock button (Transmitter) is pushed once more, map lamp,
room lamp (Center) and ignition key cylinder lamp are turned off, sounding and flashing will stop. Panic will not function when
ignition key is in ignition key cylinder.
6. Repeat Function
If the lock detection signal in response to the output signal is not received after the integration relay has output the lock
signal, the lock signal is output again.
: Parts Location
Code
See Page
Code
See Page
B5
38
D12
D8
38
D9
38
J2
37
D10
38
J3
37
D11
38
J6
37
I6
Code
38
A
37
See Page
J10
U1
38
A
37
B
37
: Relay Blocks
Code
2
See Page
22
111
SCION tC (EM0300U)
Code
See Page
1A
24
1B
24
24
1G
24
1H
24
1M
25
1C
1E
Code
IB1
See Page
42
IC2
42
IB2
II2
43
IJ1
43
BA2
44
: Ground Points
Code
See Page
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
BI
44
Quarter Panel LH
BK
44
112
SCION tC (EM0300U)
Memo
113
SCION tC (EM0300U)
Back Door Opener
(BAT)
(IG)
20A
DOOR
(BAT)
7. 5A
ECU–IG
(IG)
10A
MET
IG2
10A
ECU–B
2
1 1M
V
LG
2
ALTB
SIG
BACT
BDSU
GND
19 A
17 1E
7 1M
8 1C
W–B
L
O
2 BA1
10 BA2
LG
SPD
11
O
1
12 IC1
W
6 IC1
4
ECUB
W–B
1 A
3
6
Speedometer
5
2 1S
C6
Combination Meter
4
LG
I 6(A)
Integration Relay
30 1B
V
V
Power Circuit
27
J 4(A), J 5(B)
Junction
Connector
O
L
M
B6
Back Door Opener SW
L
B5
4
C A
2
C B
BR
1
5 IH1
BR
J7
Junction
Connector
W–B
W–B
3
B
IH
BR
W–B
W–B
W–B
B
BK
25
BR
1
IF
114
SCION tC (EM0300U)
ED
O
W
R
P
L
LG
G
Y
B
Speed Sensors
9
8
31
30
11
12
33
34
FL+
FL–
FR+
FR–
RL+
RL–
RR+
RR–
SP1
S1
O
26
O
15 IE2
O
115
SCION tC (EM0300U)
Back Door Opener
System Outline
If the vehicle is stationary (Slower than 5 km/h), the back door opener motor activates with control of integration relay when
back door opener SW is pushed. It results in releasing latch of back door to open back door.
: Parts Location
Code
See Page
Code
See Page
Code
See Page
B5
38
I6
A
37
J7
37
B6
38
J4
A
37
S1
35
C6
36
J5
B
37
: Relay Blocks
Code
2
See Page
22
Code
1B
1C
1E
1M
1S
See Page
24
24
25
Code
See Page
IC1
42
IE2
42
IH1
43
44
BA1
BA2
: Ground Points
Code
See Page
ED
40
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
BK
44
116
SCION tC (EM0300U)
Memo
117
SCION tC (EM0300U)
Sliding Roof
(BAT)
20A
S/ROOF
O
G
O
6 1K
5
8
+B
IG
S13
CLOSE/DOWN
E
PWS
9
10
7
2
Y
2
OPEN
CLOSE
Sliding Roof
Control SW
M2
Map Lamp
O
M
Y
W
B
1
7 IA1
W–B
OPEN/UP
6
P
SPD
5
G
J1
Junction Connector
W–B
W–B
O
G
O
118
SCION tC (EM0300U)
(BAT)
(IG)
(BAT)
10A
MET
IG2
10A
ECU–B
7. 5A
ECU–IG
20A
DOOR
2
3
1K
5
SIG
2
Integration Relay
DCTY
PCTY
GND
13
26
20
1
4 1K
21 1A
14 1C
1 1K
ECUB
30 1B
6
7 1M
17 1E
2 1S
W–B
W–B
3
4
C6
Combination Meter
Speedometer
18
W–B
L
Y
O
V
KOF
1 1M
LG
4
ALTB
V
O
(IG)
IJ1
1
27
25
1
C A
Y
8 1C
C B
15 IE2
O
BR
8 1D
J 4(A), J 5(B)
Junction Connector
L
O
BR
1
D10
Door Courtesy SW
D9
Door Courtesy SW
(Driver' s Side)
L
Power Circuit
O
S1
Skid Control ECU
with Actuator
26
5 IH1
FL–
8
31
30
11
12
33
34
P
L
LG
G
Y
B
FR+
FR–
RL+
RR+
RR–
B
B
BR
O
RL–
J7
Junction Connector
FL+
9
R
W–B
W–B
W–B
W
BR
SP1
Speed Sensors
IF
IH
ED
119
SCION tC (EM0300U)
Sliding Roof
System Outline
Current is always applied from the S/ROOF fuse to TERMINAL 5 of the sliding roof control ECU. With the ignition SW turned
on, the current from the ECU–IG fuse flows to TERMINAL 8 of the sliding roof control ECU.
1. Sliding Roof Open/Close Operation
For sliding roof operation, there are sliding roof control switches: ”Slide open/tilt up”; and ”Slide close/tilt down.” When a
switch is pressed and held down for a certain period of time, one touch automatic operation takes place in accordance with
the function of the switch.
2. Key–Off Operation
Roof remains operable – until about 43 seconds elapse after the ignition SW is turned from ON to OFF or until the driver’s or
passenger’s door is opened, whichever first occurs.
However, if an overload reverse operation was going on at that time, the key–off operation continues until it comes to an end.
3. Overload Reverse Operation
The sliding roof control ECU detects jamming of the sliding roof by foreign material, if occurred, from abnormal motor speed
signal and reverses the sliding roof operation.
∗ When the battery terminal or fuse is disconnected, the roof position has to be reset to its initial position by the sliding roof
control SW in accordance with the following procedure:
(1) Reconnect the battery terminal or fuse.
(2) Turn ON the ignition switch.
(3) Operate the sliding roof control SW to open the roof halfway or more.
(4) Then operate the sliding roof control SW to fully close the roof.
Do not release the switch for at least 2 seconds after the roof is fully closed.
: Parts Location
Code
See Page
Code
C6
36
J4
J5
See Page
Code
See Page
A
37
S1
35
B
37
S13
39
D9
38
D10
38
J7
37
J1
37
M2
38
: Relay Blocks
Code
2
See Page
22
Code
See Page
1A
24
1B
24
24
24
25
1C
1D
1E
1K
1M
1S
Code
See Page
IA1
42
Roof Wire and Instrument Panel Wire (Cowl Top Side Panel LH)
IE2
42
IH1
43
IJ1
43
120
SCION tC (EM0300U)
: Ground Points
Code
See Page
ED
40
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
121
SCION tC (EM0300U)
Shift Lock
(IG)
(ACC)
14 1D
10A
STOP
18 1B
BR
7 1S
GR
7. 5A
ACC
B
7. 5A
ECU–IG
(BAT)
2
D A
F B
B B
1
L
H A
J 1(A), J 2(B)
Junction Connector
S8
Stop Lamp SW
12 1B
GR
1
6
7
ACC
STP
L
B
18 1S
IG
S6
Shift Lock
Solenoid
SLS+
SLS–
KLS+
E
8
R
12
U 1(A)
Unlock Warning SW
W–B
Key
Interlock
Solenoid
4 A
W–B
3 A
A
J9
Junction Connector
A
J6
Junction Connector
A
IF
W–B
W–B
A
IH
122
SCION tC (EM0300U)
System Outline
When the ignition SW is turned to ACC position the current from the ACC fuse flows to TERMINAL 6 of the shift lock control
ECU. When the ignition SW is turned to ON position, the current from the ECU–IG fuse flows to TERMINAL 1 of the shift lock
control ECU.
1. Shift Lock Mechanism
If the brake pedal is depressed with the ignition SW set at ON (The stop light SW is on), the shift lock control ECU is
activated, allowing the driver to change the shift lever to a position other than the P position.
2. Key Interlock Mechanism
With the ignition SW at ON or ACC position, when the shift lever is put in P position, the current flowing from TERMINAL 12
of the shift lock control ECU to key interlock solenoid is cut off. This causes the key interlock solenoid to turn off (Lock lever
disengages from LOCK position) and the ignition key can be turned from ACC to LOCK position.
: Parts Location
Code
J1
J2
See Page
Code
See Page
A
37
J9
37
B
37
S6
37
37
S8
37
J6
Code
U1
See Page
A
37
Code
See Page
1B
24
1D
24
1S
25
: Ground Points
Code
See Page
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
123
SCION tC (EM0300U)
ECT and A/T Indicator
(BAT)
(ST)
(IG)
20A
EFI
(BAT)
15A
IG2
7. 5A
ST
2
(BAT)
10A
ETCS
10A
STOP
2
21 1E
18 1B
Y
P1
Park/Neutral
Position SW
L
T2
Transmission Revolution Sensor
(Counter Gear)
4
B
2
S8
Stop Lamp SW
Y
V
V
2
L
3
BR
2
G
2
1
P
L
N
O
V
V
O
5
9 IE1
10 IE1
12 1B
1
2
V
B
Y
G
L
BR
R
G
8 A
3 A
12 A
30 A
9 A
4 B
7 A
34 C
26 C
2
5
MREL
STA
BATT
EFI Relay
1
5 IE1
O
2
24 1E
7 IH2
NSW
STP
IGSW
NC+
+BM
NC–
E 4(A), E 5(B), E 7(C), E 8(D)
VG
28 C
E2G
30 C
THA
E2
THW
29 C
32 D
GE01
28 D
8 D
M+
5 D
M–
4 D
VTA1
20 D
VC
VTA2
19 D
18 D
M1
Mass Air
Flow Meter
18 1E
BR
J7
Junction
Connector
V
G
2
2
1
6
5
4
M+
M–
VTA
VC
VTA2
2
1
R
M
3
R
E2
A
A
Y
+B
E2
Engine Coolant Temp. Sensor
7 EA1
LG
THA
W
1
E2G
B
4
VG
G
5
P
A A
L
E B
W
O
E B
BR
GR
2
BR
W–B
2
+B2
2 A
(Shielded)
1 A
R
+B
3
J 4(A), J 5(B)
Junction
Connector
R
2
R
Y
11 1B
E2
R
3
T1
Throttle Body
Assembly
R
R
W–B
R
EC
124
SCION tC (EM0300U)
D4
Data Link
Connector 3
TC
G
13
A10
8 1E
2
P
1
D A
2
3
IF1
B B
35 C
27 C
26 A
18 A
20 A
27 A
19 A
21 A
17 B
11 B
NT+
VCPA
NT–
VPA
EPA
VCP2
VPA2
EPA2
W
P
IF1
W
2
R
IF1
V
6
P
IF1
BR
1
W
IF1
L
5
LG
IF1
L
4
W
J 4(A), J 5(B)
Junction Connector
4
EP2
R
3
VPA2
G
VCP2
W
5
G
6
EP1
BR
1
VPA1
B
VCP1
L
T3
(Turbine)
12 1D
21 B
TC
R
D
E04
ME01
W–B
3 C
W–B
7 C
(∗1)
W–B
L
EOM
29 A
W–B
3
S4
E1
3 D
W–B
G
G
Y
8
SLT–
THO1
24 C
1
DSL
THO
O
7
SLT+
DSL
9 C
R
2
SL2–
S4
8 C
G
GR
SLT–
13 C
BR
V
9
SL2+
SLT+
12 C
O
B
W
4
SL1–
SL2–
15 C
BR
10
SL1+
Y
5
SL2+
14 C
LG
SL1–
10 C
P
B
SL1+
11 C
V
E 4(A), E 5(B), E 7(C), E 8(D)
BR
A
(∗1)
A
O
L
6 IH1
6
R
E1
Electronically Controlled Transmission Solenoid
R
J8
Junction
Connector
A
BR
E2
ED
EE
125
SCION tC (EM0300U)
(IG)
B
10A
GAUGE
P1
2
RB
6 IH2
20 IH2
17 IH2
1 IH2
18 IH2
P
R
B
16 IH2
W
W
6
P
PL
1
O
RL
9
GR
NL
7
L
DL
3
P
B
2L
8
P
11 IH2
LL
O
BR
15 1S
P
P
R
O
P
A
J3
Junction
Connector
A
LG
P
W
W
W
6 1E
2 1D
A
5 1D
11 1C
2 1C
6 D
8 B
19 B
BR
V
G
B
3
7 D
2
P
SPD
E02
GR
E01
L
E03
4 C
20
40
39
38
37
B
BR
GR
B
B
L
P
B
J7
Junction
Connector
B
B
BR
B
G
18
19
ATD
3
R
AT4
E 4(A), E 5(B), E 7(C), E 8(D)
13 1C
J3
Junction Connector
LG
LG
L
O
9 B
2
Y
10 B
Transmission
Control SW
R
9
NSSD
S6
W
19 1E
LG
20 1E 10 1C
B
1 1E
5 IH1
P
R
N
D
3
2
C6
Combination Meter
1
BR
BR
BR
BR
C A
L
C B
J 4(A), J 5(B)
Junction
Connector
BR
L
8 1C
L
ED
126
SCION tC (EM0300U)
(IG)
(BAT)
10A
MET
IG2
10A
ECU–B
2
2
V
LG
1 1M
Speed Sensors
R
P
L
LG
G
Y
B
2 1S
W
30 1B
9
8
31
30
11
12
33
34
FL+
FL–
FR+
FR–
RL+
RL–
RR+
RR–
SP1
S1
O
26
V
4
3
O
LG
15 IE2
Speedometer
25
Power Circuit
27
L
C6
Combination Meter
L
127
SCION tC (EM0300U)
System Outline
Previous automatic transaxle have selected each gear shift using the mechanically controlled throttle hydraulic pressure,
governor hydraulic pressure and lock–up hydraulic pressure. The electronically controlled transmission, however, electrically
controls the line pressure and lock–up pressure etc., through the solenoid valve. Engine control module controls each
solenoid valve based on the input signals from each sensor, which makes smooth driving possible by shift selection for each
gear that is most appropriate to the driving conditions at that time.
1. Gear Shift Operation
When driving, the engine warm up condition is input as a signal to TERMINAL THW of the engine control module from the
engine coolant temp. sensor and the vehicle speed signal is input to TERMINAL SPD of the engine control module. At the
same time, the throttle valve opening signal from throttle body assembly is input to TERMINALS VTA1 and VTA2 of the
engine control module as throttle angle signal.
Based on these signals, the engine control module selects the best shift position for the driving conditions and sends current
to the electronically controlled transmission solenoid.
2. Lock–Up Operation
When the engine control module judges from each signal that lock–up operation conditions have been met, current flows
from TERMINAL S4 of the engine control module to TERMINAL 8 of the electronically controlled transmission solenoid to
GROUND, causing continuity to the lock–up solenoid and causing lock–up operation.
3. Clutch Pressure Control
The electronically controlled transmission solenoid is controlled by the current from TERMINAL SLT+ of the engine control
module, and controls the accumulator hydraulic pressure.
As a result, the clutch to hydraulic pressure is adjusted precisely, and allows stable shift change.
4. Line Pressure Control
The engine control module adjusts the line hydraulic pressure to the optimal level by controlling TERMINAL SLT+ of the
module according to the engine torque data. This realizes the smooth gear shifting.
5. Shifting Control in Uphill/Downhill Traveling
This system determines whether the vehicle is traveling on an incline or decline from the throttle opening angle, vehicle
acceleration condition and brake pedal operation, and controls the shift up to O/D to allow smooth driving.
6. Clutch to Clutch Control
When shifting from the 1st gear to the 2nd gear and the 2nd gear to the 3rd gear, the current from the engine control module
TERMINALS SL1+ and SL2+ control the electronically controlled transmission solenoid, to control the drain orifice hydraulic
pressure (Switch orifice). The electronically controlled transmission solenoid is also controlled by the current from the engine
control module TERMINALS SL1+ and SL2+, to adjust the hydraulic pressure precisely, which ensures smooth shifting.
7. Stop Lamp SW Circuit
If the brake pedal is depressed (Stop lamp SW on) when driving in lock–up condition, a signal is input to TERMINAL STP of
the engine control module, the engine control module operates and continuity to the lock–up solenoid is cut.
: Parts Location
Code
See Page
Code
A10
36
C6
36
E8
D4
36
J4
E1
34
J5
E2
34
See Page
D
S1
35
37
S6
37
A
37
S8
37
B
37
T1
35
J7
37
T2
35
T3
35
A
36
J8
37
E5
B
36
M1
35
E7
C
36
P1
35
: Relay Blocks
See Page
See Page
36
J3
E4
Code
Code
2
22
3
23
128
SCION tC (EM0300U)
Code
1B
See Page
24
1C
1D
24
1E
1M
1S
25
Code
EA1
IE1
IE2
IF1
IH1
IH2
See Page
40
42
43
Instrument Panel Wire and Sensor Wire (Instrument Panel Brace LH)
43
: Ground Points
Code
See Page
EC
40
Front Left Fender
ED
40
EE
40
129
SCION tC (EM0300U)
Cruise Control
(BAT)
(IG)
20A
EFI
(BAT)
(IG)
15A
IG2
(IG)
10A
GAUGE
10A
STOP
7. 5A
ECU–IG
2
2
9 1B 18 1B
15 1S
B
Y
D
R
GR
(A/T)
L
(M/T)
2
1
L
V
O
V
2
7
4
O
1
C9
Cruise Control
Clutch SW
2
P1
Park/Neutral
Position SW
S8
Stop Lamp SW
3
(A/T)
V
11 IH2
(M/T)
BR
G
G
BR
V
24 1B
(A/T)
21 1E
20 IH2
18 IE2
20 IE2
24 1E
2
L
L
V
O
G
5
1
A
R
J3
Junction
Connector
2
W
A
EFI Relay
(M/T)
10 IE1
W
9 IE1
(A/T)
12 1B
(A/T)
8 A
9 A
BATT
4 A
16 A
21 B
STP
ST1–
IGSW
2
D
Y
3
S4
1
DSL
THO
O
O
8
SLT–
THO1
24 C
G
DSL
9 C
G
7
SLT+
S4
8 C
R
2
SL2–
G
9
SL2+
SLT–
13 C
GR
BR
V
4
SL1–
SLT+
12 C
O
W
P
LG
10
SL1+
SL2–
15 C
BR
5
SL2+
14 C
Y
E B
SL1–
10 C
P
O
E B
SL1+
11 C
B
GR
18 1E
ME01
3 C
W–B
11 1B
A A
E04
7 C
B
+B2
2 A
W–B
+B
1 A
V
E 4(A), E 5(B), E 7(C), E 8(D)
BR
W–B
2
3 A
MREL
3
J 4(A), J 5(B)
Junction
Connector
2
W–B
W–B
E2
E1
6
W–B
R
EC
EE
130
SCION tC (EM0300U)
(BAT)
10A
ETCS
2
D4
Data Link
Connector 3
S7
Spiral Cable
2
CANCEL
TC
G
L
Cruise Control SW
– SET
13
+ RES
12 1D
ON–OFF
8 1E
ECC
G
CCS
J 4(A), J 5(B)
Junction
Connector
Spiral Cable
D A
4
W–B
W–B
PI
E1
4 C
7 D
6 D
8 B
18 B
3 D
6 IH1
19 IH2
BR
BR
W–B
29 A
L
Y
31 B
B
7 A
V
BR
17 B
BR
R
B B
5
5 IE1
A
A
+BM
TC
CCS
EOM
E 4(A), E 5(B), E 7(C), E 8(D)
M+
M–
4 D
VTA1
20 D
VTA2
VC
18 D
19 D
E03
E01
SPD
E02
B
P
B
B
B
B
BR
BR
2
1
6
5
4
M+
M–
VTA
VC
VTA2
J8
Junction
Connector
1 1E
A
BR
G
A
J7
Junction
Connector
BR
A
J7
Junction
Connector
LG
W
V
5 D
B
(Shielded)
GE01
8 D
R
E2
28 D
5 IH1
M
L
BR
8 1C
B
E2
3
L
T1
BR
BR
R
R
BR
BR
R
ED
ED
131
SCION tC (EM0300U)
Cruise Control
(IG)
(BAT)
10A
MET
IG2
10A
ECU–B
2
1 1M
V
LG
2
30 1B
V
4
3
CRUISE
Speedometer
LG
2 1S
15 IE2
O
C A
25
O
27
J 4(A), J 5(B)
Junction
Connector
1
L
C6
Combination Meter
B
34
BR
Power
Circuit
S1
C B
FL+
FL–
9
8
31
30
11
12
33
34
R
P
L
LG
G
Y
B
B
SP1
W
BR
26
FR+
FR–
RL+
L
BR
Speed Sensors
132
SCION tC (EM0300U)
RL–
RR+
RR–
System Outline
The cruise control system is a constant vehicle speed controller in which control of the switch on the steering wheel makes it
possible to automatically adjust the opening of the engine throttle valve without depressing of the accel pedal.
1. Set Operation
When the ON–OFF SW is turned on, the system starts preparations necessary for the cruise control and turns on the
indicator light in the combination meter.
2. Set Speed Control
When the SET/– SW is operated with the ON–OFF SW turned on during travelling, the constant vehicle speed is controlled.
3. Coast Control
When the SET/– SW is kept turned on during cruise control travelling, the engine control module controls the throttle valve to
decelerate the vehicle. Every time the SET/– SW is turned on momentarily, the vehicle speed is decelerated by
approximately 1.6 km/h. However, in the case of tap–down operation to make more than a 5 km/h difference between the set
speed and the actual vehicle speed, the device memories the speed when the switch was turned off and controls it at that
speed constantly.
4. Accel Control
When the RES/+ SW is kept turned on during cruise control travelling, the engine control module controls the throttle valve to
accelerate the vehicle. Every time the RES/+ SW is turned on momentarily, the vehicle speed is accelerated by
approximately 1.6 km/h. However, in the case of tap–up operation to make more than a 5 km/h difference between the set
speed and the actual vehicle speed, the device does not change the set speed. (Tap–up operation is not available.)
5. Resume Control
When the vehicle speed falls below the low speed limit and the cruise control is cancelled, the preset speed is retained in the
memory. However, the resume control is available only when the vehicle speed exceeds the low speed limit.
6. Manual Cancel Mechanism
If any of the following signals is input during cruise control travelling, the cruise control is cancelled.
∗ The stop lamp SW is turned on. (The brake pedal is depressed)
∗ The CANCEL SW is turned on.
∗ The ON–OFF SW is turned off.
∗ The cruise control clutch SW is turned off. (M/T) (The clutch pedal is depressed)
∗ Gear is shifted from position D or 3 to other positions. (A/T)
7. Auto Cancel Function
If any of the following conditions is encountered, the cruise control is automatically cancelled.
∗ Disconnection and/or short in the stop light SW
∗ Malfunction in the vehicle speed signal
∗ Malfunction in the electronic throttle parts
∗ Malfunction in the stop lamp SW input circuit
∗ Malfunction in the cancel circuit
∗ The actual vehicle speed becomes slower than the minimum speed limit
∗ The actual vehicle speed becomes 16 km/h slower than the set speed
8. Overdrive Control Function
The overdrive is sometimes cut off on hills during cruise control driving. When the end of a climbing hills is determined by the
throttle opening degree information after the overdrive has been canceled, control is reset to the overdrive condition after the
overdrive resetting timer operation. Also, when the overdrive is cut off during accelerator control and resuming control,
control is reset to the overdrive condition when the accelerator control and resuming control is finished.
: Parts Location
Code
See Page
Code
See Page
Code
See Page
C6
36
E7
C
36
J8
37
C9
36
E8
D
36
P1
35
D4
36
37
S1
35
E1
34
J4
A
37
S7
37
J5
B
37
S8
37
37
T1
35
E4
A
36
E5
B
36
J3
J7
: Relay Blocks
Code
2
See Page
22
133
SCION tC (EM0300U)
Cruise Control
Code
1B
See Page
24
1C
1D
24
1E
1M
1S
25
Code
IE1
IE2
IH1
IH2
See Page
42
43
: Ground Points
Code
See Page
EC
40
Front Left Fender
ED
40
EE
40
134
SCION tC (EM0300U)
Memo
135
SCION tC (EM0300U)
ABS
(BAT)
W
2
S19
2
W
2
2
S18
B
40A
ABS
NO. 2
50A
ABS
NO. 1
2
B
2
+BM
Y
IJ1
19
IJ1
5 IE2
4 IE2
1
+BS
B
2 IE2
Y
3 IE2
G
B
9
Y
R
3 IC2
Y
4 IC2
BR
W
1
LG
23
B
W
1
B
(BAT)
11
12
33
34
RL+
RL–
RR+
RR–
S1
GND2
FL+
FL–
9
8
FR+
31
FR–
PKB
30
18
16 IE2
W–B
1
EA
136
SCION tC (EM0300U)
2
1
P6
Parking Brake SW
2
S3
S2
B
P
R
W
W–B
W–B
LG
2
L
GND1
24
1
(IG)
(BAT)
D4
10A
STOP
7. 5A
ECU–IG
TC
13
3 1S
12 1D
26 1B
23 1B
2
18 1B
24 1B
S8
Stop Lamp SW
BR
G
R
SIL
7
W
TS
12
Y
L
1
12 1B
21 1B
L
25
TC
10
IG1
STP
S1
WA
SP1
PN
6
B
13 IE2
15 IE2
18 IE2
B
17 IE2
(A/T)
O
26
O
13
(A/T)
BRL
32
SB
16
D/G
W
P
14
TS
V
W
15
V
L
12 IE2
B(A/T)
O
W
V
137
SCION tC (EM0300U)
ABS
(IG)
(IG)
(BAT)
B
(A/T)
10A
GAUGE
NL
10A
ECU–B
10A
MET IG2
2
RB
PL
P1
Park/Neutral
Position SW
2
P
N
W
O
2
V
LG
6
(A/T)
9
1 1M
(A/T)
(A/T)
BR
15 1S
30 1B
11 IH2
17 IH2
18 IH2
B
39
37
4
3
25
13
W
B
(A/T)
16
O
Speedometer
Power Circuit
C6
Combination Meter
ABS
V
B
(A/T)
R
2 1S
(A/T)
(A/T)
B(A/T)
O
W
V
V
138
SCION tC (EM0300U)
5 IH1
B
ED
1
B2
Brake Fluid Level
Warning SW
R
C B
J 4(A), J 5(B)
Junction Connector
B
BR
1
W–B
BR
C A
J7
Junction Connector
BR
10
BR
V
BRAKE
C6
Combination Meter
12
5 1C
22 1B
V
2
B
EB
139
SCION tC (EM0300U)
ABS
System Outline
∗ ABS system
This system controls the respective brake fluid pressures acting on the disc brake cylinders of the right front wheel, left front
wheel and rear wheels when the brakes are applied in a panic stop so that the wheels do not lock. This results in improved
directional stability and steerability during panic braking.
1. Input Signals
(1) Speed sensor signal
The speed of the wheels is detected and input to TERMINALS 9, 11, 31 and 33 of the skid control ECU with actuator.
(2) Stop light SW signal
A signal is input to TERMINAL 10 of the skid control ECU with actuator when the brake pedal is depressed.
2. System Operation
During sudden braking the skid control ECU with actuator has signals input from each sensor, which controls the current to
the solenoid inside the actuator and lets the hydraulic pressure acting on each wheel cylinder escape to the reservoir. The
pump inside the actuator is also operating at this time and it returns the brake fluid from the reservoir to the master cylinder,
thus preventing locking of the vehicle wheels.
If the skid control ECU with actuator judges that the hydraulic pressure acting on the wheel cylinder is insufficient, the current
on the solenoid is controlled and the hydraulic pressure is increased. Holding of the hydraulic pressure is also controlled by
the skid control ECU with actuator, by the same method as above. Pressure reduction, holding and increase are repeated to
maintain vehicle stability and to improve steerability during sudden braking.
: Parts Location
Code
See Page
Code
See Page
Code
See Page
B2
34
J7
37
S3
35
C6
36
P1
35
S8
37
D4
36
P6
37
S18
39
S19
39
J4
A
37
S1
35
J5
B
37
S2
35
: Relay Blocks
Code
2
See Page
22
Code
1B
1C
1D
1M
1S
See Page
24
24
25
Code
See Page
IC2
42
IE2
42
43
43
IH1
IH2
IJ1
: Ground Points
Code
EA
EB
ED
See Page
40
Front Right Fender
40
140
SCION tC (EM0300U)
Memo
141
SCION tC (EM0300U)
Tire Pressure Warning System
(IG)
7. 5A
ECU–IG
D4
7 1S
TC
SIL
13
W
12 1D
3 1S
8 1E
7 1E
W
D A
E A
R
F B
P
A B
J 1(A), J 2(B)
Junction
Connector
G
B B
H A
J 4(A), J 5(B)
Junction
Connector
G
Y
G
7
3
10
7
TC
SIL
IG
11
9
1
BR
W–B
GR
C B
2
IJ1
15
IJ1
V
BR
5
1
4
+5V
RDA
GND
SPD
IND
2
5
L
G B
J 1(A), J 2(B)
Junction
Connector
1
BR
O
C B
T6
Tire Pressure
Warning Reset SW
14
CLSW
J 5(B)
Junction
Connector
IJ1
RDA
LG
GND
12
V
RF5V
13
GND2
6
O
T11
G A
W–B
5 IH1
O
LG
BR
B
ED
A
J9
Junction
Connector
B
A
W–B
T12
Tire Pressure Warning
Antenna and Receiver
J7
Junction
Connector
BR
O
IH
142
SCION tC (EM0300U)
(BAT)
(IG)
10A
MET
IG2
10A
ECU–B
11 1M
V
2
LG
30 1B
V
2 1S
1
BR
25
O
27
L
LG
36
Tire
Pressure
C6
Combination Meter
3
Speedometer
4
Speed Sensors (Rear LH, RH)
8 1C
Y
B
11
12
33
34
SP1
RL+
RL–
RR+
RR–
FL–
8
31
30
R
P
L
FR+
FR–
W
5 IH1
BR
LG
FL+
9
S1
Skid Control ECU
with Actuator
G
26
BR
C B
LG
O
C A
O
8 1D
J 4(A), J 5(B)
Junction Connector
BR
15 IE2
B
Speed Sensors (Front LH, RH)
BR
B
J7
Junction
Connector
O
ED
143
SCION tC (EM0300U)
System Outline
The tire pressure warning valve and transmitter installed in the tire wheel detects the tire air pressure and transmits signals
to the vehicle side receiver. When the detected tire air pressure is below a specified level, the warning light in the
combination meter comes on to inform the driver.
Press the tire pressure warning reset SW for 3 seconds with the ignition SW at ON position after the tire pressure is adjusted
to the specified value. It will lead the tire pressure warning ECU to warn the pressure according to the specified value.
Warnings when the tire pressure is low
∗ When the tire air pressure is below a specified level, the warning light in the combination meter comes on.
: Parts Location
Code
See Page
Code
See Page
Code
See Page
C6
36
J4
A
37
S1
35
D4
36
J5
B
37
T6
37
J1
A
37
J7
37
T11
37
J2
B
37
J9
37
T12
39
: Relay Blocks
Code
2
See Page
22
Code
1B
See Page
24
1C
1D
24
1E
1M
1S
25
Code
See Page
IE2
42
IH1
43
IJ1
43
: Ground Points
Code
See Page
ED
40
IH
42
Cowl Brace RH
144
SCION tC (EM0300U)
SRS
NOTICE: When inspecting or repairing the SRS, perform service in accordance with the following precautionary instructions
and the procedure, and precautions in the Repair Manual applicable for the model year.
D Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most important source of information
when troubleshooting. When troubleshooting the SRS, always inspect the DTCs before disconnecting the battery.
D Work must be started more than 90 seconds after the ignition SW is turned to the ”LOCK” position and the
negative (–) terminal cable is disconnected from the battery.
(The SRS is equipped with a back–up power source so that if work is started within 90 seconds from
disconnecting the negative (–) terminal cable of the battery, the SRS may deploy.)
D When the negative (–) terminal cable is disconnected from the battery, the memory of the clock and audio system will be
cleared. So before starting work, make a record of the contents in the audio memory system. When work is finished,
reset the audio systems as they were before and adjust the clock. Some vehicles have power tilt steering, power
telescopic steering, power seat and power outside rear view mirror which are all equipped with memory function.
However, it is not possible to make a record of these memory contents. So when the work is finished, it will be
necessary to explain it to your customer, and ask the customer to adjust the features and reset the memory. To avoid
erasing the memory in each system, never use a back–up power supply from outside the vehicle.
D Before repair, remove the airbag sensor if shocks are likely to be applied to the sensor during repair.
D Do not expose the following parts directly to hot air or flame;
D Even in cases of a minor collision where the SRS does not deploy, the following parts should be inspected;
D Never use SRS parts from another vehicle. When replacing parts, replace with new parts.
D For the purpose of reuse, never disassemble and repair the following parts.
D If the following parts have been dropped, or have cracks, dents and other defects in their case, bracket, and connector,
replace with new one.
D Use a volt/ohmmeter with high impedance (10 kΩ/V minimum) for troubleshooting electrical circuits of the system.
D Information labels are attached to the periphery of the SRS components. Follow the instructions of the notice.
D After work on the SRS is completed, check the SRS warning light.
D If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the Repair
Manual.
∗
∗
∗
∗
∗
∗
∗
∗
∗
∗
Steering wheel pad
Front passenger airbag assembly
Side airbag assembly
Curtain shield airbag assembly
Knee airbag assembly
Seat belt pretensioner
Center airbag sensor assembly
Front airbag sensor assembly
Side airbag sensor assembly
Rear airbag sensor assembly
145
SCION tC (EM0300U)
SRS
(IG)
(IG)
D4
E5
10A
MET IG2
15A
IG2
TC
1 1M
13
SIL
F/PS
7
16 1E
32
1 1D
W
Y
12 1D
3 1S
3 1E
13 1E
31 1E
15 1E
B
LG
G
LG
P
W
G
SRS
15 B
16 B
22 B
TC
SIL
21 B
GSW2
IG2
A11(A), A12(B), A13(C)
D–
D2+
D2–
6 B
8 B
7 B
Y–G
O
D+
5 B
Y–R
O
LA
14 B
Y
13 B
Y–B
22
P+
P–
4 B
3 B
P2+
1 B
P2–
2 B
Y–B
Y
Y–R
Y–G
1 IM1
1 IG1
2 IG1
3 IG1
4 IG1
4
3
Y–G
2
Y–R
1
Y
14 1S
2 A
1 A
2 B
1 B
Spiral
Cable
BR
C B
32 1E
Y–B
C A
J 4(A), J 5(B)
Junction Connector
O
29
R
PBEW
1
BR
C6
Combination Meter
4
5 IH1
BR
A16
Airbag Squib
(Steering Wheel Pad)
B
J7
Junction Connector
BR
B
ED
146
SCION tC (EM0300U)
A14(A), A15(B)
Airbag Squib
(Front Passenger' s
Airbag Assembly)
∗ 1 : w/ Side Airbag
LG
LG
W
21 A
22 C
ESD
VUPP
A18
Airbag Sensor
(Rear LH)
2
1
VUCL
ESCL
2
1
VUCR
2
ESCR
1
B
(∗1)
W
(∗1)
B
(∗1)
W
(∗1)
(∗1)
Y–B
Y
(∗1)
(∗1)
Y–B
Y
(∗1)
B
1
A19
Airbag Sensor
(Rear RH)
(∗1)
2
1 IK1
B
W
(∗1)
(∗1)
2 IK1
(∗1)
20 C
4 A
ESP
3 A
ICD+
ICD–
5 C
ICP+
6 C
ICP–
20 A
22 A
VUCD
ESCD
21 C
VUCP
19 C
ESCP
A11(A), A12(B), A13(C)
–SR
B
1 IE3
2 IE3
B
W
4 IE3
W
3 IE3
R
R
27 B
2
1
2
1
+SL
–SL
+SR
–SR
A4
Airbag Sensor
(Front LH)
A5
Airbag Sensor
(Front RH)
PD+
PD–
PP+
PP–
5 A
6 A
4 C
3 C
Y
+SR
29 B
Y–B
–SL
28 B
Y
+SL
30 B
Y–B
B
1 ID1
C12
Curtain Shield
Airbag Squib
(RH)
ESR
1
G
VUPD
2
G
19 A
VUPR
(∗1)
W
(∗1)
2 ID1
B
1
W
ESL
2
(∗1)
VUPL
C11
Curtain Shield
Airbag Squib
(LH)
S10
Side Airbag Sensor
(RH)
(∗1)
S9
Side Airbag Sensor
(LH)
1
2
1
2
P13
Pretensioner
(LH)
P14
Pretensioner
(RH)
147
SCION tC (EM0300U)
SRS
(IG)
10A
GAUGE
1 1P
LG
LG
P
R
L
F6
(Driver' s Side)
20 A (∗2)
20 B (∗3)
Buckle SW
Airbag ON/OFF
Indicator
A/BON
BR
2 IM1
3 IM1
B
Y
BR
R
L
4
W
2
R
3
G
1
A/BOFF
36 A (∗2)
36 B (∗3)
Y
35 A
35 B
A 7(A), (B)
A/C Control
Assembly
IG+
Seat Position
Airbag Sensor
10 A
18 A
9 A
17 A
23 B
17 B
24 C
16 C
DBE+
DBE–
DSP+
PAON
DSP–
P–AB
FSP–
A11(A), A12(B), A13(C)
BR
2
E2
26 B
14 1E
30 1E
7 1M
17 1E
W–B
1
E1
25 B
W–B
S12
Side Airbag Squib
(RH)
Y–G
Y
(∗1)
2
DK–
10 B
W–B
S11
Side Airbag Squib
(LH)
1
DK+
9 B
Y–R
2
SFP–
7 C
(∗1)
Y
SFP+
8 C
(∗1)
(∗1)
Y–B
1
SFD–
2 A
Y–B
SFD+
1 A
K2
Knee Airbag Squib
IF
148
SCION tC (EM0300U)
IH
FSP+
(BAT)
10A
ECU–B
2
G
2
LG
30 1B
R
L
D
O6
Occupant Classification
Sensor Front LH
O8
Sensor Front RH
BR
D
J3
Junction
Connector
LG
R
12 1H
1
2
3
1
2
3
G
R
SB
G
W
L
O
IJ1
LG
3
R
IJ1
L
4
8 A
4 A
7 A
1 A
11 B
7 B
1 B
12 B
8 B
2 B
FSR+
FSR–
IG
+B
SVC1
SIG1
SGD1
SVC2
SIG2
SGD2
O 4(A), O 5(B)
BR
SGD4
4 B
R
SIG4
10 B
V
SVC4
6 B
W
1
SGD3
3 B
Y
2
SIG3
9 B
GR
5
SVC3
5 B
1
2
3
1
2
3
IJ1
W–B
E A
A
7 1E
F8
Front Seat
Inner Belt
(Front
Passenger' s Side)
A
O7
Sensor Rear LH
O9
Sensor Rear RH
W
3 1S
W–B
7
SIL
D4
Data Link
Connector 3
J9
Junction
Connector
W
E A
J 4(A)
Junction
Connector
R
IJ1
BGND
5 A
GR
W–B
6
BSW
9 A
B
DIA
2 A
W
GND
3 A
IH
149
SCION tC (EM0300U)
SRS
System Outline
∗ The system reaches an ignition judgment to deploy the following device based on the signals received from the front
airbag sensor and deceleration sensor.
– Driver Airbag
– Front Passenger Airbag
– Knee Airbag
– Seat Belt Pretensioner
∗ The system reaches an ignition judgment to deploy the following device based on the signals received from the side
airbag sensors.
– Side Airbags
– Curtain Shield Airbags
∗ The dual–stage SRS airbag system has been used for the driver and front passenger airbags. This system controls the
optimal airbag inflation by judging the extent of impact, seat position (driver seat) and whether or not the seat belt is
fastened (driver seat) and information from the Front Passenger Occupant Classification System.
∗ The front passenger occupant classification system judges whether the front passenger seat is occupied by an adult or
child (with child seat) or is unoccupied, according to the load applied to the front passenger seat and whether the seat belt
is buckled. Based on the results, it restricts the deployment of the front passenger airbag, front passenger side airbag, and
front passenger seat belt pretensioner. In addition, the system informs the driver of the result of the judgment through the
use of the AIRBAG ON/OFF indicator lights.
∗ The airbag sensor assembly transmits a signal to the Engine Control Module in order to stop the fuel pump.
: Parts Location
Code
See Page
A4
A5
Code
See Page
34
C11
38
Code
O5
See Page
B
39
34
C12
38
O6
39
A
36
D4
36
O7
39
B
36
E5
36
O8
39
A11
A
36
F6
38
O9
39
A12
B
36
F8
38
P13
39
A13
C
36
J3
37
P14
39
A14
A
36
J4
A
37
S9
39
A15
B
36
J5
B
37
S10
39
A7
A16
36
J7
37
S11
39
A18
38
J9
37
S12
39
A19
38
K2
37
C6
36
O4
A
39
: Relay Blocks
Code
2
See Page
22
Code
1B
See Page
24
1D
1E
24
1H
1M
1P
25
1S
150
SCION tC (EM0300U)
Code
See Page
ID1
42
Front Door LH Wire and Floor Wire (Left Kick Panel)
IE3
42
IG1
43
Instrument Panel Wire and Instrument Panel Wire Assembly (Behind of the Glove Box)
IH1
43
IJ1
43
IK1
43
Front Door RH Wire and Floor No.2 Wire (Right Kick Panel)
IM1
43
Instrument Panel Wire and Instrument Panel Wire (Left Kick Panel)
: Ground Points
Code
See Page
ED
40
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
151
SCION tC (EM0300U)
Horn
(BAT)
10A
HORN
2
GR
2
GR
2
1
2
5
HORN
Relay
2
3
2
P
2
28 1B
D B
G
G
W
B A
J 1(A), J 2(B)
Junction Connector
W
25 1E
6
1
1
S7
Spiral Cable
Horn SW
H7
Horn (High)
152
SCION tC (EM0300U)
H6
Horn (Low)
: Parts Location
Code
See Page
Code
See Page
H6
34
J1
A
37
H7
34
J2
B
37
Code
S7
See Page
37
: Relay Blocks
Code
2
See Page
22
Code
See Page
1B
24
1E
24
153
SCION tC (EM0300U)
Cigarette Lighter
(ACC)
15A
CIG
B
3 1Q
2
C4
Cigarette Lighter
W–B
1
A
J9
Junction Connector
W–B
A
IH
154
SCION tC (EM0300U)
: Parts Location
Code
See Page
C4
Code
36
J9
See Page
Code
See Page
37
Code
1Q
See Page
25
: Ground Points
Code
IH
See Page
42
Cowl Brace RH
155
SCION tC (EM0300U)
Power Outlet
(BAT)
15A
ACC
SOCKET
(ACC)
6 1M
14 1D
R
GR
7. 5A
ACC
D
J1
Junction Connector
R
GR
D
5
1
P8
Power Point
Socket Relay
2
O
W–B
3
1
+ACC
E
P7
Power Point
Socket
W–B
W–B
2
A
J6
Junction Connector
A
W–B
A
IF
156
SCION tC (EM0300U)
: Parts Location
Code
See Page
Code
See Page
J1
37
P7
37
J6
37
P8
37
Code
See Page
Code
See Page
1D
24
1M
25
: Ground Points
Code
IF
See Page
42
Cowl Brace LH
157
SCION tC (EM0300U)
Key Reminder
(IG)
(BAT)
10A
MET
IG2
10A
ECU–B
2
2
V
1 1M
LG
30 1B
V
2 1S
C6
Combination Meter
3
Buzzer
4
Power Circuit
1
J 4(A), J 5(B)
Junction
Connector
A
C A
Y
J1
Junction
Connector
BR
7
BR
8
A
BR
BR
C B
6 1C
4 1C
21 1A
26 1E
B
BR
2 A (A/T)
2 B (M/T)
1 A (A/T)
1 B (M/T)
A
J7
Junction
Connector
B
W–B
A
B
IF
158
SCION tC (EM0300U)
BR
J6
Junction
Connector
BR
1
U 1(A), (B)
Unlock Warning SW
D9
Door Courtesy SW
(Driver' s Side)
O
5 IH1
ED
System Outline
Current is always applied from the ECU–B fuse to TERMINAL 3 of the combination meter. When the ignition SW is turned to
ON position, the current from the MET IG2 fuse flows to TERMINAL 4 of the combination meter.
Key Reminder System
When the driver door is opened with the ignition SW off and ignition key remaining in the key cylinder (Unlock warning SW
on), a signal is input from the unlock warning SW to TERMINAL 7 of the combination meter, and from the door courtesy SW
(Driver’s side) to TERMINAL 8 of the combination meter. As a result, the buzzer in the combination meter goes on and warns
the driver that the key is remaining in the key cylinder.
: Parts Location
Code
See Page
Code
C6
36
J4
D9
38
J5
J1
37
J6
See Page
A
37
B
37
37
Code
See Page
J7
U1
37
A
37
B
37
: Relay Blocks
Code
2
See Page
22
Code
See Page
1A
24
1B
24
1C
1E
1M
1S
24
25
Code
IH1
See Page
43
: Ground Points
Code
See Page
ED
40
IF
42
Cowl Brace LH
159
SCION tC (EM0300U)
Light Reminder
(IG)
W
(BAT)
10A
MET
IG2
10A
ECU–B
1 1G
2
2
1 1M
V
T–LP
Relay
LG
30 1B
2 1S
V
7. 5A
PANEL
3
19
4
6 1P
Buzzer
R
TAIL
8
Y
BR
J1
Junction
Connector
2
14
T
120A
ALT
BR
BR
Tail
4 1C
6 1C
26 1E
21 1A
Head
16
W–B
W–B
IH
A
IF
160
SCION tC (EM0300U)
B
B
A
W–B
BR
O
1 A (A/T)
1 B (M/T)
J6
Junction
Connector
BR
7 1M
BR
17 1E
1
J7
Junction
Connector
12 1E
2 A (A/T)
2 B (M/T)
D9
Door Courtesy SW
(Driver' s Side)
U 1(A), (B)
Unlock Warning SW
B
W–B
5 IH1
FL MAIN
3. 0W
Battery
C A
C B
OFF
C7
Combination SW
B
EL
A
Light
Control SW
2
H
A
1
BR
7
J 4(A), J 5(B)
Junction
Connector
6
R
C6
Combination Meter
W
2
1
Power Circuit
13 A
BR
I 6(A)
Integration
Relay
TRLY
ED
System Outline
The current is applied at all times to TERMINAL 3 of the combination meter through the ECU–B fuse.
When the ignition SW is turned to ON position, the current flows to TERMINAL 4 of the combination meter through the MET
IG2 fuse. When the light control SW is turned to TAIL or HEAD position, current is applied to TERMINAL 6 of the combination
meter through the PANEL fuse.
Light Reminder System
When the light control SW is in TAIL or HEAD position, the ignition SW turned to OFF from ON position, ignition key is not in
the key cylinder and the driver’s door opened (Door courtesy SW on), the current flows to TERMINAL 4 of the combination
meter stops. As a result, the combination meter is activated and current flows from TERMINAL 3 of the combination meter,
the buzzer in the combination meter goes on to remind the light is lighting up.
: Parts Location
Code
See Page
Code
See Page
C6
36
C7
36
J4
A
37
D9
38
J5
B
37
I6
A
J1
37
J6
Code
37
See Page
J7
U1
37
A
37
B
37
37
: Relay Blocks
Code
2
See Page
22
Code
See Page
1A
24
1B
24
24
24
25
1C
1E
1G
1M
1P
1S
Code
IH1
See Page
43
: Ground Points
Code
See Page
ED
40
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
161
SCION tC (EM0300U)
A
BI
BR
FSP–
6
1
16 C
FSP+
4
8
FSR–
FSR+
BSW
3
9
5
2
1
A
A
IH
162
SCION tC (EM0300U)
BGND
C B
B
B
ED
J 4(A), J 5(B)
Junction
Connector
C A
J7
Junction
Connector
2 IC2
24 C
BR
C
O4
Occupant
Classification ECU
PBEW
F8
BR
13 B
A12(B), A13(C)
Airbag Sensor
Assembly Center
C
22
BR
2
GND
GR
Power Circuit
L
5
L
3
B
Passenger' s
Seat Belt
Warning Lamp
Driver' s
Seat Belt
V
V
1 1M
R
SEAT
38 A (∗1)
38 B (∗2)
Buzzer
10A
MET
IG2
W–B
24
L
4
W–B
L
20 A (∗1)
20 B (∗2)
Buckle SW
L
J1
Junction
Connector
10A
GAUGE
J9
Junction
Connector
W–B
F7
(Driver' s Side)
(IG)
W–B
J10
Junction
Connector
1 1P
LG
P
(IG)
P
P
A 7(A), (B)
Seat Belt Warning
(BAT)
10A
ECU–B
2
2
30 1B
2 1S
C6
Combination Meter
IG
1
5 IH1
IJ1
System Outline
Current is always applied from the ECU–B fuse to TERMINAL 3 of the combination meter. When the ignition SW is turned to
ON position, the current from the MET IG2 fuse flows to TERMINAL 4 of the combination meter.
Seat Belt Warning System
When the ignition SW turned on, a signal is input to the combination meter. To determine whether the driver has fastened the
seat belt, a signal is input from the front seat inner belt (Driver’s side) to TERMINAL 5 of the combination meter. When the
seat belt is not fastened, the seat belt warning light in the combination meter blinks, and emits a warning sound.
In addition, the front passenger is recognized by a sensor (Occupant detection sensor) is installed in the front passenger
seat, and determines whether the seat belt is fastened. When not fastened, the signals from the front seat inner belt (Front
passenger’s side) is input to TERMINAL 22 of the combination meter, and the passenger’s seat belt warning lamp blinks.
: Parts Location
Code
A7
See Page
Code
See Page
A
36
F7
38
Code
See Page
J7
37
B
36
F8
38
J9
37
A12
B
36
J1
37
J10
38
A13
C
36
J4
A
37
O4
39
36
J5
B
37
C6
: Relay Blocks
Code
2
See Page
22
Code
1B
See Page
24
25
1M
1P
1S
Code
See Page
IC2
42
IH1
43
IJ1
43
: Ground Points
Code
See Page
ED
40
IH
42
Cowl Brace RH
BI
44
Quarter Panel LH
163
SCION tC (EM0300U)
(IG)
(BAT)
10A
GAUGE
30A
DEF
2
DEF
Relay
2 1F
P
B
12 1Q
7 IC1
B
5 A (∗1)
5 B (∗2)
Rear Window
Defogger SW
1 BA1
B
GND
12 A (∗1)
12 B (∗2)
B
W–B
W–B
A
B
A
R6
J9
Junction
Connector
1
N3
Noise Filter
(DEF and Stop)
B
W–B
A 7(A), (B)
A/C Control
Assembly
RrDEF
IH
164
SCION tC (EM0300U)
1
: Parts Location
Code
A7
See Page
Code
See Page
A
36
J9
37
B
36
N3
38
Code
R6
See Page
39
Code
See Page
1F
24
1Q
25
Code
See Page
IC1
42
BA1
44
: Ground Points
Code
IH
See Page
42
Cowl Brace RH
165
SCION tC (EM0300U)
Audio System
(ACC)
(BAT)
20A
RAD NO. 1
7. 5A
ACC
Volume–
2
Volume+
2
Steering Pad SW
6 1S
L
Seek–
Seek+
4
2
1
3
1
2
S14
Speaker
(Front Door LH)
G
SW2
RR+
RR–
1 B
3 B
W
10 IC1
BR
(∗1)
O
RL–
6 B
9 IC1
8 C
SWG
IJ1
11
L
1
1
2
S15
Speaker
(Front Door RH)
IG
166
SCION tC (EM0300U)
1
S16
Speaker
(Rear LH)
2
IJ1
W
2
RL+
2 B
Y
II2
L
12
LG
II2
T10
Tweeter (RH)
P
1
BR
7
LG
V
3
FR–
5 A
V
P
P
7 IB1
T9
Tweeter (LH)
BR
2 IB1
4
FR+
1 A
Y
FL–
6 A
BR
FL+
2 A
6 C
SW1
V
GND
7 A
7 C
ANT
L
+B
LG
ACC
R 2(A), R 3(B), R 9(C)
AU2
11
R
8 A
EAU
10
P
4 A
AU1
12
(∗1)
O
3 A
L
1
R
A17
Antenna
Amplifier
(∗1)
S7
Spiral Cable
GR
8 IE1
MODE
1
2
S17
Speaker
(Rear RH)
∗ 1 : w/ Audio Steering Pad SW
(IG)
(BAT)
10A
MET
IG2
10A
ECU–B
2
1 1M
V
2
S20
Stereo Jack Adaptor
30 1B
ARO
1
2
ASGN
AUXO
3
LG
ALO
4
4
17 C
15 C
16 C
19 C
ALI
ARI
ASGN
V
4
IL1
3
Speedometer
IL1
W
3
BR
IL1
R
2
W
R
L
IL1
L
AUXI
Power Circuit
R 2(A), R 3(B), R 9(C)
SPD
J 1(A), J 2(B)
Junction
Connector
Y
3 C
C6
Combination Meter
G B
1
BR
Speed Sensors
(Rear LH, RH)
C A
C B
O
LG
G
Y
B
BR
15 IE2
26
11
12
33
34
8 1C
SP1
RL–
RR+
RR–
FL+
FL–
9
8
31
30
B
R
P
L
S1
W
J7
Junction
Connector
5 IH1
RL+
BR
8 1D
J 4(A), J 5(B)
Junction
Connector
O
G A
25
O
27
L
FR+
FR–
B
Speed Sensors
(Front LH, RH)
BR
1
BR
2 1S
ED
167
SCION tC (EM0300U)
Audio System
: Parts Location
Code
See Page
A17
C6
Code
36
R2
See Page
Code
See Page
A
37
S16
39
36
R3
B
37
S17
39
J1
A
37
R9
C
37
S20
37
J2
B
37
S1
35
T9
39
J4
A
37
S7
37
T10
39
J5
B
37
S14
39
37
S15
39
J7
: Relay Blocks
Code
2
See Page
22
Code
1B
1C
1D
1M
1S
See Page
24
24
25
Code
See Page
IB1
42
IC1
42
42
IH1
43
IE1
IE2
II2
43
IJ1
43
IL1
43
Console Box Wire and Instrument Panel Wire (Under the Console Box)
: Ground Points
Code
See Page
ED
40
IG
42
Instrument Panel Brace LH
168
SCION tC (EM0300U)
Memo
169
SCION tC (EM0300U)
Combination Meter
(BAT)
(IG)
10A
MET
IG2
120A
ALT
(BAT)
10A
ECU–B
2
2
2
1 1M
W
2
V
1 1G
30 1B
7. 5A
PANEL
T–LP
Relay
2 1S
C6
Combination Meter
Tachometer
Fuel
27
25
26
23
O
B
V
3
Speedometer
LG
4
L
R
6
Illumination
ODO/TRIP
Illumination
6 1P
Power Circuit
Rheostat
2
SB
O
W
O
G
11
1 1C
G A
8 1D
8 1C
11
2
SPD
SPD
SPD
18 A (∗1)
18 B (∗2)
SPD
T11
Tire Pressure
Warning ECU
A 7(A), (B)
A/C Control
Assembly
V
L
3
O
Y
6
R9
Radio Receiver
Assembly
P
S13
Sliding Roof
Control ECU
SPD
8
SPD
Integration
Relay
E5
Engine Control
Module
170
SCION tC (EM0300U)
R
1 1E
2
3
Fuel Sender
G B
V
G B
13 1A
F9
Fuel Suction Pump
and Gage Assembly
G B
9 IC2
Skid Control ECU
with Actuator
7 IA1
J 1(A), J 2(B)
Junction
Connector
Illuminations
G A
SCION tC (EM0300U)
Integration Relay
5
22
14
L
L
L
29
(Driver' s Side)
24
R
P
36
Door
Illumination
Driver' s
Seat Belt
SRS
Fuel
Tire Pressure
Buzzer
LG
7
Y
ODO/TRIP
Unlock Warning SW
8
BR
R
21
Door Courtesy SW
(Driver' s Side)
Temp.
C6
Combination Meter
171
1
2
1
EB
172
SCION tC (EM0300U)
G
CRUISE
GR
H–LP
Relay
B
1
3
2
5
2
15
B
Charge
Oil Pressure
ABS
BRAKE
2
Generator
17
Y
9
W
13
22 1B
B
5 1C
W
B
12
Skid Control ECU
with Actuator
R
10
E3
Engine Oil
Pressure SW
W–B
B2
Brake Fluid Level
Warning SW
Skid Control ECU
with Actuator
V
B
B
Combination Meter
(BAT)
G
40A
MAIN
B
2
2
2
2
G
C6
Combination Meter
34
13 IH2
C6
Combination Meter
5 IH1
B
SCION tC (EM0300U)
Beam
37
16
R
38
P
39
R
N
40
Combination SW
1
20
D
L
GR
(A/T)
B
(A/T)
P
(A/T)
R
(A/T)
LG
(A/T)
Y
(A/T)
GR
(A/T)
G
19
3
2
L
Turn RH
18
(A/T)
B
BR
33
Skid Control ECU
with Actuator
BR
Y
32
BR
J7
Junction
Connector
BR
J 4(A), J 5(B)
Junction
Connector
Turn LH
P
Park/Neutral
Position SW
Transmission
Control SW
Park/Neutral
Position SW
FLASH Relay
G
G
2
1
10A
H–LP
RH HI
2
2
11 IE1
30
31
C A
C B
B
ED
173
Combination Meter
: Parts Location
Code
A7
See Page
A
36
B
36
Code
See Page
E5
36
F9
Code
J5
See Page
B
37
38
J7
37
B2
34
J1
A
37
R9
37
C6
36
J2
B
37
S13
39
E3
34
J4
A
37
T11
37
: Relay Blocks
Code
2
See Page
22
Code
See Page
1A
24
1B
24
24
24
25
1C
1D
1E
1G
1M
1P
1S
Code
See Page
IA1
42
Roof Wire and Instrument Panel Wire (Cowl Top Side Panel LH)
IC2
42
IE1
42
43
IH1
IH2
: Ground Points
Code
See Page
EB
40
Front Right Fender
ED
40
174
SCION tC (EM0300U)
Memo
175
SCION tC (EM0300U)
Radiator Fan and Condenser Fan
(BAT)
(IG)
30A
RDI
(BAT)
30A
CDS
7. 5A
ECU–IG
2
2
24 1B
E2
2
Y
2
Y
R
L
Y
Y
Y
LG
Y
1
2
1
FAN NO. 1
Relay
3
4
FAN NO. 2
Relay
2
2
3
2
2
1
3
2
2
2
2
2
L
W–B
W
W
W
L
32 D
28 D
FAN NO. 3
Relay
5
2
5
R
1
2
2
2
2
G
5
2
E 4(A), E 8(D)
2
THW
E2
FANH
14 A
2
MGC
6 A (∗1)
6 B (∗2)
M
GR
A 7(A), (B)
A/C Control
Assembly
O
A2
B
8 EA1
W–B
W
L
GR
L
9 IH2
GR
BR
1
3 IH2
W–B
2
W–B
W–B
W–B
EC
176
SCION tC (EM0300U)
G
6 EA1
1
3
R
1
W
M
D5
Diode (Fan)
P5
Pressure SW
2
R
3
2
W–B
R1
Radiator Fan Motor
W
L
System Outline
Fan Motor Operation
With the ignition SW turned on, the current through the ECU–IG fuse flows to the FAN NO.1 relay (Coil side), FAN NO.2 relay
(Coil side) and FAN NO.3 relay (Coil side).
1. Low Speed Operation
Only when the A/C system is activated, the A/C condenser fan motor and the radiator fan motor rotates at low speed.
When the A/C system is activated, the current from ECU–IG fuse flows to the FAN NO.3 relay (Coil side) to TERMINAL 2 of
the diode (Fan) to TERMINAL 3 to TERMINAL (B) 2 of the engine control module causing the FAN NO.3 relay to turn on. As
a result, the current through the CDS fuse flows to TERMINAL 5 of the FAN NO.3 relay to TERMINAL 3 to TERMINAL 2 of
the A/C condenser fan motor to TERMINAL 1 to TERMINAL 3 of the FAN NO.2 relay to TERMINAL 4 to TERMINAL 2 of the
radiator fan motor to TERMINAL 1 to GROUND. As this flowing in series for the motors, the motors rotate at low speed.
2. High Speed Operation
With the pressure SW is turned on and/or the engine control module activated, the A/C condenser fan motor and the radiator
fan motor rotate at high speed.
When the pressure SW is turned on, the current through the ECU–IG fuse flows to the FAN NO.1 and NO.2 relay (Coil side)
to TERMINAL 3 of the pressure SW to TERMINAL 2 to GROUND, and the current through the ECU–IG fuse flows to the
FAN NO.3 relay (Coil side) to TERMINAL 2 of the diode (Fan) to TERMINAL 1 to TERMINAL 3 of the pressure SW to
TERMINAL 2 to GROUND. As a result, FAN NO.1, NO.2. and NO.3 relay is turned on. At the same time, the current from the
RDI fuse flows to FAN NO.1 relay (Point side) to TERMINAL 2 of the radiator fan motor to TERMINAL 1 to GROUND, and
the current from the CDS fuse flows to FAN NO.3 relay (Point side) to TERMINAL 2 of the A/C condenser fan motor to
TERMINAL 1 to TERMINAL 3 of the FAN NO.2 relay to TERMINAL 5 to GROUND.
As the current flowing in parallel for motors as above, the motors rotate at high speed.
When the engine control module activated, the current through the ECU–IG fuse flows to the FAN NO.1 and NO.2 relay (Coil
side) to TERMINAL (E) 14 of the engine control module, and the current through the ECU–IG fuse flows to the FAN NO.3
relay (Coil side) to TERMINAL 2 of the diode (Fan) to TERMINAL 1 to TERMINAL (E) 14 of the engine control module. As a
result, FAN NO.1, NO.2 and NO.3 relay is turned on. At the same time, the current from the RDI fuse flows to FAN NO.1
relay (Point side) to TERMINAL 2 of the radiator fan motor to TERMINAL 1 to GROUND, and the current from the CDS fuse
flows to FAN NO.3 relay (Point side) to TERMINAL 2 of the A/C condenser fan motor to TERMINAL 1 to TERMINAL 3 of the
FAN NO.2 relay to TERMINAL 5 to GROUND.
As the current flowing in parallel for motors as above, the motors rotate at high speed.
: Parts Location
Code
See Page
A2
A7
Code
34
A
36
B
36
See Page
D5
36
E2
E4
A
Code
E8
See Page
D
36
34
P5
35
36
R1
35
: Relay Blocks
Code
2
See Page
22
Code
1B
See Page
24
Code
See Page
EA1
40
IH2
43
: Ground Points
Code
EC
See Page
40
Front Left Fender
177
SCION tC (EM0300U)
Air Conditioning
(BAT)
(IG)
40A
HTR
10A
GAUGE
2
2 1P
O
2
M
1 1L
FRS
2
4
HTR
Relay
3
REC
1
LG
7 1F
R
17 1E
L
7 1M
2
P
1
1
20 A
20 B
3 A
3 B
4 A
4 B
24 A
24 B
B
5
D1
3
A8
A/C Thermistor No. 1
1 1P
P
L
2
5 1Q
IG
REC
FRS
32 A (∗1)
32 B (∗2)
TE
SG–TE
GND
PRS
37 A (∗1)
37 B (∗2)
BLC
12 A
12 B
G
W–B
9 A
9 B
L
FrHR
11 A
11 B
BR
BR
L
W–B
W–B
A 7(A), (B)
B4
Blower Motor Control
2
14 IE2
L
VM
GND
4
1
A
A
B
+B
3
J9
Junction
Connector
V
SI
1
4
L
1
W–B
B3
Blower
Motor
W–B
M
P5
Pressure SW
2
W–B
L
W–B
IF
IH
178
SCION tC (EM0300U)
EC
(BAT)
10A
ECU–B
2
V
2
2
A6
V
30 1B
V
2 1S
1
SB
G
BR
E5
3 1D
19 IE2
O
AC1
B
LG
P
V
BR
24
P
25
23 A
23 B
31 A
31 B
16 A
16 B
10 A
10 B
40 A
40 B
6 A
6 B
TAM
SG–TAM
ACT
AC1
+B
O
9 IE2
ACT
18 A (∗1)
18 B (∗2)
MGC
SPD
SG–TP
TP
13 A (∗1)
13 B (∗2)
A 7(A), (B)
4
FACE
2
DEF
M
D3
1
VZ
5
Pl
S5–TP
4
MAXHOT
30 A
30 B
Y
14 A
14 B
1
MAXCOOL
B
AMC
21 A
21 B
GR
3
GND
AMH
22 A
22 B
V
TPM
33 A
33 B
G
SG–TPM
29 A
29 B
L
LG
W
5
S5–TPM
34 A
34 B
V
AOD
2 A
2 B
G
AOF
1 A
1 B
2
VZ
3
GND
Tl
M
D2
179
SCION tC (EM0300U)
Air Conditioning
(IG)
(IG)
10A
A/C
7. 5A
ECU–IG
7 1S
V
H A
4 EA1
F B
O
R
BR
B
BR
J 1(A), J 2(B)
Junction Connector
B
O
29 1B
2 IH2
3
5
3
1
MG/C
Relay
2
3
3
G
1
3 IH2
BR
A1
A/C Compressor
W
3
V
O
180
SCION tC (EM0300U)
(IG)
10A
MET
IG2
LG
1 1M
R
P
L
LG
G
Y
B
4
W
LG
3
Speedometer
V
Speed Sensors
9
8
31
30
11
12
33
34
FL+
FL–
FR–
RL+
RL–
RR+
RR–
SP1
26
S1
Power Circuit
O
C6
Combination Meter
FR+
15 IE2
27
J 4(A), J 5(B)
Junction
Connector
O
L
C A
8 1C
25
BR
1
O
C B
O
BR
8 1D
J 1(A), J 2(B)
Junction
Connector
5 IH1
BR
G A
O
B
B
BR
V
J7
Junction
Connector
O
G B
ED
181
SCION tC (EM0300U)
Air Conditioning
System Outline
1. Heater Blower Operation
When the blower speed is set to a certain level using the blower control SW, the A/C control assembly sends the signals to
the blower control to control the blower motor speed.
2. Damper Servo Motor (Air Inlet) Control
When the FRESH/RECIRC select SW is set to RECIRC, the motor in the damper servo motor (Air inlet) starts rotating to
move the damper toward the RECIRC side. Since the damper position is detected by the TERMINAL REC of the A/C control
assembly, the motor is continuously rotated until the damper reaches its stop position.When the FRESH/RECIRC select SW
is set to FRESH, the motor in the air inlet control servo motor starts rotating to move the damper toward the FRESH side.
Since the damper position is detected by the TERMINAL FRS of the A/C control assembly, the motor is continuously rotated
until the damper reaches its stop position.
3. Damper Servo Motor (Air Vent Mode) Control
When the mode select SW is pushed, the ECU in the A/C control assembly activates the damper servo motor (Air vent
mode). This causes the servo motor to rotate to the position (FACE, BI–LEVEL, FOOT, FOOT/DEF, DEF) selected using the
mode select SW, and moves the damper.
4. Damper Servo Motor (Air Mix) Control
When the temperature control SW is pressed, the ECU in the A/C control assembly sends a signal to the damper servo
motor (Air mix). This signal drives the motor to reach the temperature set by the temperature control SW, and moves the
damper.
5. Air Conditioning Operation
The A/C control assembly receives various signals, I.E., the engine RPM from the engine control module, out side air
temperature signal from the ambient temp. sensor and coolant temperature from the engine control module, etc.
When the engine is started and the A/C SW (A/C control assembly) is on, a signal is input to the engine control module.
As a result, the ground circuit in engine control module is closed and current flows from ECU–IG fuse to TERMINAL 1 of the
MG/C relay to TERMINAL 2 to TERMINAL ACMG of the engine control module, turning the MG/C relay on, so that the
magnetic clutch is on and the A/C compressor operates.
At the same time, the A/C control assembly detects the magnetic clutch is on and the A/C compressor operates.
If the A/C control assembly detects the following conditions, it stops the air conditioning:
∗ Evaporator outlet air is too low.
∗ There is a marked difference between the compressor speed and the engine speed.
∗ The refrigerant pressure is abnormally high or abnormally low.
∗ The engine speed is too low.
∗ Rapid acceleration occurs.
6. DEF Synchronized Control Function
When the blower SW is on and the air vent mode control SW turned to DEF or FOOT DEF position, if causes A/C to run
whether A/C SW is on or not.
: Parts Location
Code
See Page
A1
A6
A7
Code
See Page
Code
34
C6
36
J4
J5
See Page
A
37
B
37
34
D1
36
A
36
D2
36
J7
37
B
36
D3
36
J9
37
A8
36
36
P5
35
B3
36
J1
E5
A
37
S1
35
B4
36
J2
B
37
: Relay Blocks
Code
See Page
2
22
3
23
182
SCION tC (EM0300U)
Code
1B
See Page
24
24
24
25
1C
1D
1E
1F
1L
1M
1P
1Q
1S
Code
See Page
EA1
40
IE2
42
43
IH1
IH2
: Ground Points
Code
See Page
EC
40
Front Left Fender
ED
40
IF
42
Cowl Brace LH
IH
42
Cowl Brace RH
183
SCION tC (EM0300U)
I GROUND POINT
10
IC2
BR
(SG)
Combination Meter
C
B
W–B
BR
C
A
C
B
BR
BR
C
A
5
IH1
J 4(A), J 5(B)
Junction
Connector
BR
Ignition Coil
(No. 2)
BR
Ignition Coil
(No. 3)
BR
Ignition Coil
(No. 4)
BR
BR B
B
B
P
Tire Pressure
Warning ECU
(E01)
(E02)
∗
∗
∗
∗
BR
Engine
Control
Module
6
IH1
BR
(∗1)
A
1
2
3
4
: w/ Cruise Control
: w/ Sliding Roof
: w/ Jam Protection
W–B
(∗1)
L
A
A
(EOM)
(E1)
BR
Engine
Control
Module
(E03)
BR
Engine
Control
Module
B
W–B
(E04)
J7
Junction
Connector
B
BR
Ignition Coil
(No. 1)
W–B
W–B
J8
Junction Connector
Data Link
Connector 3
C
A
5
BB1
W–B
BR
W–B
(ME01)
(∗2)
EE
19
IH2
W–B
(∗2)
Spiral Cable
ED
W–B
Headlamp (LH Low)
W–B
W–B
Windshield
Wiper Motor
W–B
W–B
Turn Signal Lamp
(Front RH)
W–B
(–S)
W–B
W–B
Parking Lamp (LH)
W–B
Turn Signal Lamp
(Front LH)
Parking Lamp (RH)
Pressure SW
FAN NO. 2 Relay
2
EFI Relay
2
W–B
W–B
Headlamp (RH Low)
Brake Fluid
Level Warning SW
W–B
W–B
W–B
W–B
W–B
2
W–B
W–B
IG2 Relay
W–B
W–B
Radiator Fan Motor
W–B
W–B
(CUT–)
W–B
EC
W–B
EB
184
SCION tC (EM0300U)
EA
(GND1)
(GND2)
Skid
Control
ECU with
Actuator
I
Noise Filter
Integration Relay
IG1 Relay
HTR Relay
FLASH Relay
28
1E
W–B
W–B
12
1E
W–B
W–B
14
1E
W–B
(E)
Combination SW
(EL)
(E1)
Airbag Sensor
Assembly Center
(E2)
Fuel Suction Pump
and Gage Assembly
(∗3)
(E)
Map Lamp
1
1K
W–B
W–B
W–B
(∗3)
BR
30
1E
W–B
15
1A
1
1S
W–B
7
1M
1
1J
W–B
W–B
(E)
Sliding Roof
Control ECU
Room Lamp (Center)
(CG)
Data Link
Connector 3
(EW)
Combination
SW
17 1E
W–B
Junction Connector
10
IH2
BR–W
A
W–B
ST Relay
3
A
BR–W
A
A
W–B
BR–Y
A
A
BR–Y
W–B
A
A
BR–W
Power Point Socket
Relay
W–B
A
A
W–B
A/T Shift Lever
Illumination
Noise Filter
(DOME)
W–B
A
A
W–B
Shift Lock
Control ECU
W–B
A
A
W–B
A
A
W–B
Transponder Key ECU
Outer Mirror SW
Power Point Socket
(KLS–)
Power Window
Master SW
W–B
Door Lock Assembly
(Driver' s Side)
W–B
W–B
W–B
BR
(UN–)
A
6
IJ1
W–B
Tire Pressure
Warning SW
W–B
(∗4)
W–B
W–B
W–B
W–B
J9
Junction Connector
J6
Junction Connector
W–B
2
20 IB2
A
W–B A
Outer Rear View
Mirror (RH)
W–B
Door Lock Assembly
W–B
W–B
W–B
W–B
BR
IG
Power Window SW
W–B
II2
W–B
Occupant
Classification ECU
A
A
Radio Receiver
Assembly
Front Console
Illumination
(A/T)
Unlock
Warning SW
Outer Rear View
Mirror (LH)
Cigarette Lighter
IF
IH
185
SCION tC (EM0300U)
I GROUND POINT
Rear Combination
Lamp (LH)
W–B
W–B
W–B
W–B
D
B
F
A
W–B
F
A
W–B
W–B
J11(A), J12(B)
Junction
Connector
Door Control
Receiver
W–B
W–B
A
A
A
W–B
W–B
J10
Junction
Connector
W–B
A
W–B
BK
W–B
BI
W–B
(E)
License Plate Lamp
(RH)
Back Door Opener SW
W–B
Front Seat
Inner Belt
(Driver' s Side)
Back Door
Lock Assembly
W–B
Rear Combination
Lamp (RH)
(ACT–)
W–B
6 BA1
BJ
186
SCION tC (EM0300U)
Center Stop Lamp
License Plate Lamp
(LH)
I
: Parts Location
Code
J4
J5
See Page
Code
See Page
Code
See Page
A
37
J7
37
B
37
J8
37
J11
A
38
37
J9
37
J12
B
38
J6
J10
38
: Relay Blocks
Code
See Page
2
22
3
23
Code
1A
1E
1J
1K
1M
1S
See Page
24
24
24
25
Code
See Page
IB2
42
IC2
42
43
IH1
IH2
II2
43
IJ1
43
BA1
44
BB1
44
Floor Wire and Floor No.3 Wire (Center Floor Pan Center)
: Ground Points
Code
EA
See Page
40
Front Right Fender
EC
40
Front Left Fender
ED
40
EE
40
IF
42
Cowl Brace LH
IG
42
Instrument Panel Brace LH
IH
42
Cowl Brace RH
44
Quarter Panel LH
44
EB
BI
BJ
BK
187
SCION tC (EM0300U)
The chart below shows the route by which current flows from the battery to each electrical source
(Fusible Link, Circuit Breaker, Fuse, etc.) and other Parts.
7.5A ALT-S
30A RDI
10A-ETCS
30A CDS
15A IGN
50A ABS NO.1
10A HORN
2
10A OBD2
20A EFI
FL MAIN 3.0W
120A ALT
40A ABS NO.2
40A HTR
10A TURN-HAZ
Battery
2
2
PWR Relay
(Point Side)
1
T-LP Relay
(Point Side)
1
25A AM1
1
30A DEF
1
IG1 Relay
(Point Side)
1
10A ECU-B
30A DCC
2
7.5A DOME
2
20A RAD NO.1
40A MAIN
2
H-LP Relay
(Point Side)
2
30A AM2
2
Ignition SW
(AM2)
I5
[LOCATION]
1
: Instrument Panel J/B (See Page 24)
2
: Engine Room R/B and Engine Room J/B (See Page 22)
3
: Engine Room R/B No.2 (See Page 23)
188
SCION tC (EM0300U)
J
Example
20A FL DOOR
Starter
20A FR DOOR
S1
Parts
Code or Location
20A DOOR
15A FR FOG
1
7.5A DRL
4
20A S/ROOF
Location
10A STOP
Electrical Source
15A ACC SOCKET
30A POWER
1
10A TAIL
15A CIG
1
7.5A PANEL
1
7.5A ACC
Ignition SW
(AM1)
I5
7.5A ST
3
DEF Relay
(Point Side)
1
7.5A RR DEF I/UP
1
7.5A ECU-IG
30A FR WIP
15A FR WSH
1
10A GAUGE
10A A/C
10A H-LP LH LO
10A H-LP RH LO
2
10A H-LP LH HI
10A H-LP RH HI
15A IG2
1
10A MET IG2
189
SCION tC (EM0300U)
Instrument Panel J/B (See Page 24)
Fuse
System
Page
ACC
Audio System
Power Outlet
Remote Control Mirror
Shift Lock
166
156
94
122
ECU–IG
ABS
Air Conditioning
Back Door Opener
Charging
Cruise Control
Door Lock Control
Interior Light
Power Window (w/ Jam Protection)
Shift Lock
Sliding Roof
136
178
114
54
130
104
78
96
176
122
118
142
108
7.5A
PANEL
Combination Meter
Illumination
Light Reminder
170
82
160
7.5A
RR DEF I/UP
Engine Control
56
10A
A/C
Air Conditioning
178
GAUGE
ABS
Air Conditioning
Back–Up Light
Cruise Control
Electronically Controlled Transmission and A/T Indicator
Engine Control
Illumination
Seat Belt Warning
SRS
136
178
90
130
124
56
82
96
164
162
145
74
MET IG2
ABS
Air Conditioning
Audio System
Back Door Opener
Charging
Combination Meter
Cruise Control
136
178
166
114
54
170
130
124
7.5A
7.5A
10A
10A
∗ These are the page numbers of the first page on which the related system is shown.
190
SCION tC (EM0300U)
J
Fuse
System
Page
MET IG2
Engine Control
Illumination
Key Reminder
Light Reminder
Seat Belt Warning
Sliding Roof
SRS
56
82
158
160
162
118
145
142
10A
STOP
ABS
Cruise Control
Engine Control
Shift Lock
Stop Light
136
130
124
56
122
88
10A
TAIL
Engine Control
Taillight
56
86
15A
ACC SOCKET
Power Outlet
156
15A
CIG
Cigarette Lighter
154
15A
FR WSH
92
IG2
Cruise Control
Engine Control
Ignition
SRS
130
124
56
66
52
145
20A
DOOR
Back Door Opener
Door Lock Control
Sliding Roof
114
104
96
118
108
20A
FL DOOR
96
20A
FR DOOR
96
20A
S/ROOF
Sliding Roof
118
25A
AM1
Starting
50
30A
DEF
Engine Control
56
164
30A
FR WIP
92
30A
POWER
Power Window (w/o Jam Protection)
102
10A
15A
Engine Room R/B and Engine Room J/B (See Page 22)
Fuse
7.5A
ALT–S
System
Charging
Page
54
191
SCION tC (EM0300U)
Fuse
System
Page
DOME
Interior Light
78
108
ECU–B
ABS
Air Conditioning
Audio System
Back Door Opener
Combination Meter
Cruise Control
Door Lock Control
Engine Control
Illumination
Interior Light
Key Reminder
Light Reminder
Seat Belt Warning
Sliding Roof
SRS
136
178
166
114
170
130
104
124
56
66
82
78
158
160
96
162
118
145
142
108
10A
ETCS
Cruise Control
Engine Control
130
124
56
10A
H–LP LH HI
Headlight
72
10A
H–LP LH LO
Headlight
72
10A
H–LP RH HI
Combination Meter
Headlight
170
72
10A
H–LP RH LO
Headlight
72
10A
HORN
Horn
152
108
10A
OBD2
Engine Control
56
10A
TURN–HAZ
74
15A
IGN
Engine Control
Ignition
56
52
20A
EFI
Cruise Control
Engine Control
130
124
56
66
20A
RAD NO.1
Audio System
166
30A
AM2
Starting
50
30A
CDS
176
7.5A
10A
192
SCION tC (EM0300U)
J
Fuse
System
Page
30A
RDI
176
40A
ABS NO.2
ABS
136
40A
HTR
Air Conditioning
178
40A
MAIN
Combination Meter
Headlight
170
72
108
50A
ABS NO.1
ABS
136
ALT
Charging
Combination Meter
Engine Control
Illumination
Light Reminder
Starting
Taillight
54
170
56
82
160
50
86
108
120A
Engine Room R/B No.2 (See Page 23)
Fuse
7.5A
ST
System
Engine Control
Starting
Page
124
56
50
193
SCION tC (EM0300U)
K CONNECTOR LIST
*1 : w/ Cruise Control
*2 : w/o Cruise Control
A1
A2
A3
A4
A5
A6
Gray
Black
Dark Gray
Yellow
Yellow
Black
1
1 2
1
1
1 2
1
2
3
4
2
2
A7
A7
(*1)
(*2) Black
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
A8
A9
A11
Black
Yellow
1 2 3 4 5 6 7 8
1 2
12
A10
1
4
2
5
3
6
9 10 11 12 13 14 15 16
17 18 19 20 21 22 23 24
A12
A13
A14
A15
Yellow
Yellow
Orange
Black
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8
1 2
1 2
11 12 13 14 15 16 17 18 19 20
9 10 11 12 13 14 15 16
21 22 23 24 25 26 27 28 29 30
17 18 19 20 21 22 23 24
A16
A17
Yellow
A18
A19
B1
Yellow
Yellow
Gray
1
1
1 2 3 4
B2
B3
B4
2
1
B5
2
1
B6
C1
Black
Gray
2
Black
1
1
2
2
1
2
3
4
1 2
3 4
194
SCION tC (EM0300U)
1 2
2 1
K
C2
C3
Black
Gray
C4
C5
2
1 2
1
1 2
1 2
C6
C7
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
C8
C9
1
2
3
C10
Black
12
1 2
1 2 3 4 5 6 7 8 9
4 5 6 7
8
9 10 1112131415 16 17
C11
C12
Black
Black
1 2
1 2
D1
1 2 3
10 11 12 131415 16 17 18
D2
D3
Black
Black
D4
1 2 3 4 5
1 2 3 4 5
D5
D7
Black
1 2 3
1 2
16 15 14 13 12 11 10 9
8 7 6 5 4 3 2 1
D8
D9
D10
Black
Black
1
1
D11
2
3
4
1
5 6 7 8 9 10
D14
1
2
3
4
5 6 7 8 9 10
E1
E2
E3
Gray
Black
Gray
1 2
2
3 4 5 6
D13
1 2 3 4
1
1 2 3 4 5
D12
1
2
3
4
6
7
8
9 10
1
5
195
SCION tC (EM0300U)
K CONNECTOR LIST
E4
1
2
3
4
E5
5
6
7
1
8 9 10 11 12 13 14 15 16 17
2
3
E7
4
5
1
6
2
3
4
5
6
7
8 9 10 11 12 13 14 15 16 17 18 19
7 8 9 10 11 12 13 14 15 16
18 19 20 21 22 23
24 25
17 18 19 20 21 22 23 24 25 26 27
20 21 22 23
24 25
26 27
26 27
30 31
28 29 30
28 29 30 31
32 33
34 35
28 29
E8
1
2
3
4
5
6
31 32 33 34 35
F1
F2
F3
F4
Brown
Brown
Brown
Brown
1 2
1 2
1 2
1 2
7
8 9 10 11 12 13 14 15 16 17
18 19 20 21 22 23 24 25 26 27
28 29 30 31 32
33 34
F5
F6
F7
F8
F9
G1
Gray
Black
12
G2
1
12
1 2
3 4
1
2
2
4
3
5
H1
H2
H3
H4
Black
Brown
Black
Brown
1
1
1
1
1
2
2
2
2
H5
H6
H7
I1
I2
Dark Gray
Black
Black
Black
Black
1 2 3 4
1 2 3 4
1
1
3
1
2
4
I3
I4
Black
Black
1 2 3 4
1 2 3 4
I5
1
2
3
4
5
6
7
8
196
SCION tC (EM0300U)
1
2
3
4
K
I6
I7
J1
Black
1
2
A A B B C C C D D E E
1
2
3
10
11
12
F F F F G G G H H H H
4 5 6 7 8 9
13 14 15 16 17 18 19
20 21 22 23 24 25 26
J3
J2
J4
A B B
C C
A A B D D D C C
J6
J5
J7
J8
Dark Gray
A A A
Black
A A
A
A A A A A A A A
J10
A A
A A A A A A A A
A A B B B
J9
A A A
B
J11
J12
J13
A A B B C C
A A B B C C
1
D D E E F F
D D E E F F
2
Dark Gray
A A
A
A A A A A A A A
A
A A A
J14
J15
A
A
A
A
K1
K2
L1
L2
Black
Yellow
Black
Gray
1 2
1
1
1
2
2
1 2 3 4 5
6 7 8 9 10
1
2
L3
M1
Gray
Black
1
M2
M3
N1
Gray
Gray
1 2 3 4
1 2
N2
2
1 2 3 4 5
1 2 3 4
5 6 7 8
1 2
197
SCION tC (EM0300U)
K CONNECTOR LIST
N3
O1
O2
O3
O4
Black
1 2
1 2 3 4 5
1 2 3 4 5 6
7 8 9 101112
1 2 3 4 5
1 2 3 4 5 6 7 8 9 10
O5
O6
O7
O8
O9
Gray
Black
Gray
Gray
Black
1 2 3 4 5 6
7 8 9 101112
1 2 3
1 2 3
1 2 3
1 2 3
P1
P2
P3
P4
P5
Gray
Gray
Gray
Black
Dark Gray
1
1
5 6
2
7
P6
3 4
1
2
1
2
2
1
4
3
8 9
P7
P8
P9
P10
Black
3
5
1
2 1
1
1
2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
2
1
2
3 4 5 6
P11
P12
P13
P14
P15
Black
Blue
Yellow
Yellow
Blue
1
1
1
2
3 4 5 6
1 2 3 4 5 6
2
2
1 2 3 4 5
7 8 9 10 11 12
P16
P17
P18
R1
R2
Gray
1
2
3 4 5 6
1 2
3 4
5 6 7 8 9 10
1
1 2
2
3 4 5 6
198
SCION tC (EM0300U)
3 4
5 6 7 8 9 10
1
2
K
R3
R4
R5
R6
R7
Black
Gray
1
2
1 2
1 2
3 4 5 6
3 4
3 4
5 6
5 6
1
R8
2
3
1
R9
1 2
S1
S2
Black
Gray
1
2
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
1
2
23
24
3
4 5 6
7 8 9 10 11 12
13 14 15 16 17 18 19 20 21 22
S3
S4
Gray
Black
25 26 27 28 29 30 31 32 33 34
S5
S6
S7
Black
1
1
2
1
S8
1
2
3
1 2 3 4 5 6
1 2 3 4 5 6
7 8 9 10 11 12
7 8 9 10 11 12
S9
S10
S11
S12
Yellow
Yellow
Yellow
Yellow
1
1
1 2
1 2
2
2
4
S13
1 2
S14
S15
S16
S17
S18
S19
1
1
1
1
2 1
2 1
2
2
2
2
3 4
5 6 7 8 9 10
S20
T1
T2
T3
T4
Gray
Black
Black
Black
Gray
1 2 3 4
1 2 3 4 5 6
1
2
1
2
1
2
199
SCION tC (EM0300U)
K CONNECTOR LIST
T5
T6
T7
Gray
Blue
Black
1
1 2
2
1
T8
2 3 4 5 6
1 2 3 4 5 6 7
7
8 9 10 11 12 13 14
T9
T10
1 2 3 4
T11
T12
U1
Gray
(A/T)
1 2 3 4 5
1 2
3 4
1 2 3 4
1 2 3 4 5 6
7 8 9 10 11 12
U1
V1
W1
W2
Z1
(M/T)
Blue
Black
Black
Gray
1 2 3
1
1 2
1
1
2
2
4 5
Z2
1
Z3
2
3 4 5 6 7
Z4
Z5
1
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16
200
SCION tC (EM0300U)
1 2 3
4 5
6 7 8 9 10 11 12 13 14 15 16
Memo
201
SCION tC (EM0300U)
K CONNECTOR LIST
EA1
1
5
2
6
3
7
4
8
IB1
1
4
3
2
1
8
7
6
5
1
1
2
3 4 5 6 7
8 9 10 11 12
10 9 8 7 6 5 4 3 2 1
20 1918171615141312 11
IC2
Gray
2
1
7 6 5 4 3
1 2 3 4 5 6 7 8 9 10
11 1213141516171819 20
1
7 6 5 4 3
3 4 5 6 7
2
IB2
2
IC1
2
3 4 5 6 7
Gray
2
ID1
IA1
1 2 3 4 5 6 7 8 9 10 11
11 10 9 8 7 6 5 4 3 2 1
12 13 14 15 16 17 18 19 20 21 22
22 21 20 19 18 17 16 15 14 13 12
1
7 6 5 4 3
Blue
12 11 10 9 8
IE1
Yellow
Black
2 1
1
2
3 4 5 6 7
8 9 10 11 12
1 2
2
1
7 6 5 4 3
12 11 10 9 8
IE2
1 2 3 4 5 6 7 8 9 10
11 1213141516171819 20
IE3
Yellow
2 1
10 9 8 7 6 5 4 3 2 1
20 1918171615141312 11
1 2
3 4
202
SCION tC (EM0300U)
4 3
K
IE4
1
2
3
IF1
3
2
IG1
1
1
2
3
4
5
6
Black
3
6
3 2
1
4
IH1
Yellow
4
2
5
Gray
1
1 2 3 4
1
2
2
IH2
1 2 3 4 5 6 7 8 9 10
11 1213141516171819 20
II2
1
2
3 4 5 6 7
8 9 10 11 12
II1
10 9 8 7 6 5 4 3 2 1
1 2 3 4 5
5 4 3 2 1
20 1918171615141312 11
6 7 8 9 10
10 9 8 7 6
IJ1
Gray
2
1
7 6 5 4 3
3 4 5 6 7
1
7 6 5 4 3
1 2 3 4 5 6 7 8 9 10
11 1213141516171819 20
10 9 8 7 6 5 4 3 2 1
20 1918171615141312 11
12 11 10 9 8
203
SCION tC (EM0300U)
K CONNECTOR LIST
IK1
IL1
Yellow
IM1
Blue
4 3
2 1
2 1
4 3
1 2
3 4
1 2
BA1
1 2
2 1
3 4
BA2
Black
BB1
1 2
2 1
1 2 3 4 5
5 4 3 2 1
3 4
4 3
6 7 8 9 10
10 9 8 7 6
5 6
Yellow
6 5
204
SCION tC (EM0300U)
1 2 3 4
5 6 7 8
Gray
4 3 2 1
8 7 6 5
Memo
205
SCION tC (EM0300U)
Code
Part Number
Code
A1
A/C Compressor
Part Name
90980–11271
D9
Door Courtesy SW (Driver’s Side)
A2
90980–11410
D10
A3
Air Fuel Ratio Sensor (Bank 1 Sensor 1)
90980–11178
Door Courtesy SW (Front Passenger’s
Side)
A4
Airbag Sensor (Front LH)
D11
Door Lock Assembly (Driver’s Side)
D12
Door Lock Assembly (Front Passenger’s
Side)
D13
90980–11950
D14
90980–12344
E1
Solenoid
90980–11658
90980–10735
90980–11856
Part Name
A5
Airbag Sensor (Front RH)
A6
90980–11070
A7
90980–12169
A8
A/C Thermistor No.1
90980–11918
A9
90980–12063
A10
90980–11144
E2
Part Number
90980–12340
90980–12226
A11
90980–12392
E3
Engine Oil Pressure SW
90980–11363
A12
90980–12391
E4
90980–12142
A13
90980–12390
E5
90980–12146
A14
Airbag Squib (Front Passenger’s Airbag
Assembly)
E7
90980–12145
E8
90980–12144
A15
Airbag Squib (Front Passenger’s Airbag
Assembly)
F1
F2
F3
F4
F5
90980–10355
F6
90980–10942
F7
90980–11918
F8
Front Seat Inner Belt (Front Passenger’s
Side)
90980–11156
F9
Fuel Suction Pump and Gage Assembly
90980–11077
G1
Generator
90980–11964
G2
Generator
90980–09213
H1
Headlamp (LH High)
90980–11659
H2
Headlamp (LH Low)
90980–11096
H3
Headlamp (RH High)
90980–11659
H4
Headlamp (RH Low)
90980–11096
H5
Heated Oxygen Sensor (Bank 1 Sensor 2)
90980–11930
H6
Horn (Low)
H7
Horn (High)
I1
I2
I3
I4
I5
Ignition SW
90980–11615
I6
Integration Relay
90980–12203
90980–11148
90980–12219
A16
Airbag Squib (Steering Wheel Pad)
90980–12160
A17
Antenna Amplifier
90980–10870
A18
Airbag Sensor (Rear LH)
A19
Airbag Sensor (Rear RH)
B1
Back–Up Lamp SW
90980–12241
90980–11250
B2
Brake Fluid Level Warning SW
90980–11207
B3
Blower Motor
90980–10214
B4
90980–11676
B5
90980–12334
B6
Back Door Opener SW
90980–11967
C1
Camshaft Position Sensor
90980–10947
C2
Camshaft Timing Oil Control Valve
90980–11162
C3
Crankshaft Position Sensor
90980–10947
C4
Cigarette Lighter
90980–10760
C5
Clutch Start SW
90980–12341
C6
Combination Meter
90980–12169
C7
Combination SW
90980–11672
C8
Combination SW
90980–11594
C9
Cruise Control Clutch SW
90980–12341
C10
Center Stop Lamp
90980–11918
C11
Curtain Shield Airbag Squib (LH)
C12
Curtain Shield Airbag Squib (RH)
D1
D2
D3
D4
90980–11978
D5
Diode (Fan)
90980–11251
D7
Diode (Room Lamp)
90980–10962
D8
90980–12366
90980–12219
90980–11987
90980–11909
I7
Ignition Cylinder Lamp
J1
Junction Connector
J2
Junction Connector
J3
Junction Connector
Note: Not all of the above part numbers of the connector are established for the supply.
206
SCION tC (EM0300U)
90980–11875
90980–10619
90980–11885
90980–11915
90980–12346
L
Code
Part Name
Part Number
J4
Junction Connector
J5
Junction Connector
J6
Junction Connector
90980–12346
J7
Junction Connector
90980–12336
J8
Junction Connector
J9
Junction Connector
J10
Junction Connector
J11
Junction Connector
J12
Junction Connector
J13
Junction Connector
90980–11915
90980–12346
90980–10976
90980–11661
90980–12355
J14
Junction Connector
J15
Junction Connector
90980–12340
K1
Knock Control Sensor (Bank 1)
90980–11875
K2
Knee Airbag Squib
90980–12253
L1
90980–12380
L2
L3
M1
Mass Air Flow Meter
90980–11148
90980–12292
M2
Map Lamp
90980–12221
M3
Map Lamp
82824–21030
N1
Noise Filter (Ignition)
N2
Noise Filter (DOME)
N3
Noise Filter (DEF and Stop)
O1
Outer Mirror SW
O2
90980–10843
90980–12341
90980–11657
90980–11909
O3
O4
90980–12356
O5
90980–12357
O6
Occupant Classification Sensor Front LH
90980–12353
O7
Occupant Classification Sensor Rear LH
O8
90980–12354
Occupant Classification Sensor Front RH
O9
Occupant Classification Sensor Rear RH
90980–12353
P1
90980–12362
P2
Parking Lamp (LH)
P3
Parking Lamp (RH)
P4
Power Steering Oil Pressure SW
90980–11019
90980–11428
P5
Pressure SW
90980–10943
P6
Parking Brake SW
90980–12340
P7
Power Point Socket
90980–10859
P8
Power Point Socket Relay
82660–20340
P9
90980–12166
P10
P11
P12
Power Window SW (Front Passenger’s
Side)
90980–12344
90980–11947
Code
Part Name
Part Number
P13
Pretensioner (LH)
P14
Pretensioner (RH)
P15
Power Window SW (Front Passenger’s
Side)
90980–10789
P16
90980–12344
P17
90980–12540
P18
90980–12344
R1
Radiator Fan Motor
90980–10928
R2
90980–12540
R3
90980–12539
R4
R5
R6
90980–12340
R7
Room Lamp (Center)
81366–68010
R8
90980–12342
R9
90980–12259
S1
90980–12020
S2
S3
S4
Starter
90980–11400
S5
Starter
90980–09506
S6
S7
Spiral Cable
S8
Stop Lamp SW
S9
Side Airbag Sensor (LH)
S10
Side Airbag Sensor (RH)
S11
Side Airbag Squib (LH)
S12
Side Airbag Squib (RH)
S13
S14
Speaker (Front Door LH)
S15
Speaker (Front Door RH)
S16
Speaker (Rear LH)
S17
Speaker (Rear RH)
S18
S19
S20
Stereo Jack Adapter
82824–21030
T1
90980–11858
T2
Transmission Revolution Sensor (Counter
Gear)
90980–12634
T3
Transmission Revolution Sensor (Turbine)
T4
T5
T6
Tire Pressure Warning Reset SW
90980–10906
T7
90980–12092
T8
Transponder Key ECU
90980–11911
90980–12253
90980–11011
90980–11003
90980–12183
90980–11118
90980–11856
90980–11864
90980–10801
90980–12343
90980–11060
90980–11019
207
SCION tC (EM0300U)
Code
Part Name
Part Number
T9
Tweeter (LH)
T10
Tweeter (RH)
T11
T12
Tire Pressure Warning Antenna and
Receiver
90980–12366
Unlock Warning SW (A/T)
90980–12334
Unlock Warning SW (M/T)
90980–12342
VSV (Purge)
90980–12634
U1
V1
90980–12304
90980–12183
Code
Part Name
Part Number
W1
Windshield Washer Motor
90980–11019
W2
90980–11599
Z1
Option Connector (Front Fog Lamp)
90980–11007
Z2
Option Connector (Front Fog Lamp SW)
90980–12336
Z3
90980–10870
Z4
90980–12155
Z5
Option Connector (Radio Receiver
Assembly)
90980–12423
Note: Not all of the above part numbers of the connector are established for the supply.
208
SCION tC (EM0300U)
Memo
209
SCION tC (EM0300U)
[A]
Power Source
Starting
1
Engine Control
2
4
3
R
[L]
B-R
B-R
15A
EFI
[H]
12 EA1
R-Y
R-Y
7 EA3
[E]
1
3
Knock Sensor
1
B
B
BR
BR
3
B
B
1
GR
GR
4
B-W
4
EFI MAIN
Relay
B-R
B-W
1
H11
Heated
Oxygen
Sensor
2
Y-R
[G]
1
15 3C
R-G
W-B
B-W
(2L-T)
(2L-T)
4
6
1
R-W
5
BO2
Y-R
3
BR-W
BR-W
6
G
G
5
G-R
G-R
4
Y-R
7
L-Y
BR 2
1
FP
+B
T1
D1
Data Link
Connector 1
E1
8
Y-R
6
G-Y
G-Y
9
GR-B
GR-B
W-R
W-R
BR
Fender Apron LH
EA
BR
W-B
W-B
Fender Apron LH
N
O
21 EA3
B
BR
W-R
VF
4
3
[K]
EA
L
M
Y-R
R-G
BR
W-B
W-R
W-R
Fuel Pump
1
F37
M
OX1
17
EA3
R-G
2
1
W-R
W-R
W-R
W-R
I12
1
4 EA3
R-G
2
Injector No.4
1
I10
Injector No.2
I11
1
2
L-Y
W-R
Battery
K
16 BS1
B-R
2
Injector No.3
I9
S38 (A), S39 (B)
Starter
B-R
B-R
B-R
Injector No.1
B-W
2
1 A
Y-R
Y-R
R-G
B-R
30A AM2
40A AM1
100A ALT
(2L-T)
1
B
J
Air Flow Meter
W-B
[D]
B-W
B
Y-R
A5
6 EA4
2
[J]
Y-R
2 B
Circuit Opening
Relay
R-G
2 A
C19
Y-R
S40 (A), S41 (B)
Starter Relay
(Shielded)
[C]
2
1 B
F
G
I
3
[F]
7 3C
Emission ECU <9-8>
2
2
Y-R
B-W
W-R
W
[B]
E
H
B-W
(22R-E)
1 A
2
Y-R
Y-R
W-B
B-W
(22R-E)
B-L
(2L-T)
B-W(22R-E)
D
2
1
1
(2L-T)
R
SCION tC (EM0300U)
1
(22R-E)
(2L-T)
[I]
C
K2
B-L
R-Y
B-L
W
B
W-R
B-R
B-R
2
A
7. 5A
IGN
B-W
ST2
7. 5A
ST
B-W
5 8
AM2
A B
7
IG2
B
B-W
(22R-E)
W-R
W
W-R
1 4
B A
B-W
ST1
B-W
W
1 4
AM1
A B
B-L
ACC I 6 (A),(B)
Ignition SW
IG1
A
ID
Left Kick Panel
BR
EC
Intake
Manifold RH
P
Q
R
S
M OVERALL ELECTRICAL WIRING DIAGRAM
210
* The system shown here is an EXAMPLE ONLY. It is different to the
actual circuit shown in the wiring diagram section.
HOW TO READ THIS SECTION
[A] : System Title
[B] : Indicates the wiring color.
Wire colors are indicated by an alphabetical code.
B
= Black
W = White
BR = Brown
L
= Blue
V
SB = Sky Blue
= Violet
R = Red
G = Green
LG = Light Green
P
Y
GR = Gray
= Pink
= Yellow
[F] : Junction Block (The number in the circle is the J/B No.
and the connector code is shown beside it).
Junction Blocks are shaded to clearly separate them
from other parts.
Example:
3C indicates that
it is inside
Junction Block
No.3
O = Orange
The first letter indicates the basic wire color and the
second letter indicates the color of the stripe.
Example:
L–Y
[G] : Indicates related system.
SCION tC (EM0300U)
L
(Blue)
[H] : Indicates the wiring harness and wiring harness
connector. The wiring harness with male
terminal is shown with arrows ( ).
Outside numerals are pin numbers.
Y
(Yellow)
[C] : The position of the parts is the same as shown in
the wiring diagram and wire routing.
[D] : Indicates the pin number of the connector.
The numbering system is different for female
and male connectors.
Example : Numbered in order
from upper left to
lower right
Numbered in order
from upper right to
lower left
Female
[I]
Male (
)
: ( ) is used to indicate different wiring and
connector, etc. when the vehicle model, engine type,
or specification is different.
[J] : Indicates a shielded cable.
Female
Male
The numbering system for the overall wiring diagram is
the same as above
[E] : Indicates a Relay Block. No shading is used and
only the Relay Block No. is shown to distinguish
it from the J/B.
Example :
[K] : Indicates and located on ground point.
[L] : The same code occuring on the next page indicates
that the wire harness is continuous.
Indicates Relay Block No.1
M
211
SYSTEMS
LOCATION
SYSTEMS
LOCATION
SCION tC (EM0300U)
ABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16–2
Multiplex Communication System (CAN) . . . . . . . . . . . . . . . . . . . . . . 3–15
Air Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25–2
Option Connector (Front Fog Light) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–4
Audio System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22–3
Option Connector (TVIP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15–7
Back Door Opener . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15–6
Power Outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22–2
Back–Up Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11–3
Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1~25–1
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3
Power Window (w/ Jam Protection) . . . . . . . . . . . . . . . . . . . . . . . . . . . 13–2
Cigarette Lighter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21–4
Power Window (w/o Jam Protection) . . . . . . . . . . . . . . . . . . . . . . . . . . 14–2
Combination Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23–2
Radiator Fan and Condenser Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24–3
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2
Rear Window Defogger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21–2
Door Lock Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15–2
Remote Control Mirror . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21–3
Electronically Controlled Transmission and A/T Indicator . . . . . . . . . 4–2
Seat Belt Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19–2
Engine Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–5
Shift Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20–2
Engine Immobiliser System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
Sliding Roof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20–4
Front Wiper and Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12–2
SRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18–2
Headlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4
Stop Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11–4
Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3
Taillight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–2
Illumination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9–2
Tire Pressue Warning System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17–3
Interior Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10–2
Turn Signal and Hazard Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . 7–2
Key Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19–4
Wireless Door Lock Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15–8
Light Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19–4
212
SYSTEM INDEX
1 tC
P o w e r S o u rc e
S ta rtin g
Ig n itio n
1
4
3
2
B
L
ACC
2 AM1
IG1
ST1 1
7
IH1
LG
L
G
W
3
7 AM2
4 1F
IG2 6
1
ST2 8
7. 5A
ST
1 1F
R
15A
IG2
R
R
B
R
I5
Ignition SW
BR
BR
2
4
+B
GND
IGT
IGF
3
2
I4
1
BR
BR
IGF
2
I3
IGT
3
R
BR
R
V
LG
V
B
V
V
2
2
Engine Control
Module< 3–9>
3 EA1
R
R
BR
R
4 IH1
1
N1
Noise Filter
(Ignition)
J9
Junction
Connector
W–B
IH
GND
3
A
A
4
+B
B
(M/T)
BR–W
1
B
S 4(A), S 5(B)
Starter
Battery
1 A
V
4 IE1
10 IH2
R
B–R
2
W–B
FL MAIN
3. 0W
IGF
2
I2
W–B
IGT
3
1
IG2
Relay
B
(M/T)
3
B
(M/T)
B
3
2
GND
5
P
2
C5
Clutch Start SW
3
Engine Control
Module< 3–10>
ST
Relay
BR
1
2
4
+B
P
3
1
IGF
2
R
5
IGT
3
1
V
Engine Control
Module< 3–10>
3
1
1
6 IE1
Y
(M/T)
1
B
30A AM2
120A ALT
15A IGN
1
B
(M/T)
2
2
G
2
Y
L
2
2
V
B
(A/T)
2
Y
(M/T)
2
GND
I1
7 IH2
5
2
BR
3 IH1
4
+B
B
GR
R
W
N
1
Y
Y
(M/T)
P1
Park/Neutral
Position SW
B
B
P
1 EA1
R
25A AM1
27 1B
Y
(A/T)
4
L
1 1G
B
SCION tC (EM0300U)
3
1 IE4
3 IE4
Cowl Brace RH
EC
Front Left Fender
EE
M
213
Left Side of
the Cylinder Head
W
W
Y
L
Integration Relay< 15–7>
Charge
W
W
J 1(A), J 2(B)
Junction
Connector
W
B
Y
B
Engine Control
Module< 3–10>
J 1(A), J 2(B)
Junction Connector
2
2
G
G
W
H6
Horn (Low)
1
Horn SW
H7
Horn (High)
1
S7
Spiral Cable
W
P
Y
R
W–B
W–B
1
28 1B
C6
Combination Meter
B
7. 5A ECU–IG
B
1
G 1(A), G 2(B)
Generator
S A
P
25A AM1
30A AM2
120A ALT
Battery
B A
GR
LG
R
W
B
7. 5A ALT–S
Cowl Brace LH
B B
4
M L A
IG
3 A
2 A
D B
D B
15
2
2
W
10A HORN
2
25 1E
IG1
Relay
HORN
Relay
3 IE4
5
1
1 1M
I5
Ignition SW
GR
R
4
GR
3
1
F B
7 1M
17 1E
IF
IH
Cowl Brace RH
4 1F
ST1
3
2
7 1S
1 1G
1 1F
3 1F
5 EA1
1 IH1
2 IH2
6
FL MAIN
3. 0W
L
ACC
W
ST2
SCION tC (EM0300U)
1
1
1
1
5
2
2
2
2
2
2
2
1 2A
2
2
10A
MET
IG2
IG2 6
7 AM2
IG1 4
2 AM1
4
3
2
1
H o rn
C h a rg in g
H A
214
2 tC
Memo
SCION tC (EM0300U)
215
E n g in e Im m o b ilis e r S y s te m
1
4
3
2
G
A
W
B
L
R
B
V
7 AM2
2
IG2 6
ST2
P
R
2 EA1
3 IE4
2
2
2
D
2
1
9
12
13
CODE
TXCT
AGND
14
10
7
EFIO
CTY
6
4
BR
O
GR
B
W
BR–W
B
J9
Junction
Connector
A
W–B
1 1S
J6
Junction
Connector
W–B
A
Door Courtesy SW
(Driver' s Side)
< 10–2>
Unlock
Warning
SW< 15–3>
A 7(A), (B)
12 B (∗5)
A
O
GR
L
Y
W–B
W–B
W–B
Battery
11
VC5
SECU
Security
Indicator
Lamp
GND
12 A (∗4)
W–B
Y
7 1M
7
27 B (∗5)
A
17 1E
GND
5
4
V
IND
W–B
W–B
W–B
B
15 1A
FL MAIN
3. 0W
ANT2
TXCT
8
27 A (∗4)
7 EA1
W
W–B
IH
IF
Cowl Brace LH
EC
Front Left
Fender
IH
W–B
Cowl
Brace
RH
W–B
W–B
W–B
Cowl Brace RH
K
ANT1
T8
Transponder Key ECU
D
GND KSW
EFII
3
J
CODE
R
2
GR
Y
2
BR
F9
Fuel Suction
Pump and Gage
Assembly
Fuel
Pump
5
+B
3
11 1B
BR
B
L
30A AM2
20A EFI
15A IGN
30A DCC
10A ETCS
2
M
1
IG
E
B
L
2
4
1
P
2
2
LG
2
8 1A
IG2 Relay
2
2
1
5
EFI Relay
3
5 1E
1
O
Transponder Key Coil
VC5
P
5
C/OPN Relay
15A IG2
2
1
10A MET IG2
2
2
2
1
R
2
2
1
V
2
V
B
L
L
10A OBD2
1
1
T7
Transponder
Key Amplifier
18 1E
2
2
J3
Junction
Connector
B
B
GR
2 1E
O
9 IB
V
27 1B
P
W
15 1C
G
21 1E
1 1M
GR
LG
G
LG
4 1F
A
A
E
B
F
H
J 4(A), J 5(B)
Junction Connector
D
L
R
10A ECU–B
I5
Ignition SW
1
G
SCION tC (EM0300U)
2
2
E
O
G
G
LG
G
I
30 1B
2
D
V
12 1H
2
C
IF
Cowl
Brace
LH
L
M
N
O
P
Q
216
(Cont. next page)
3 tC
3 tC (Cont' d)
(Cont. next page)
∗ 1 : Malfunction Indicator Lamp
∗ 2 : Shielded
E n g in e C o n tro l
5
A
C
G
R
B
8
7
6
R
G
W
LG
C
B
R
R
R
Y
L
B
B
T1
3
LG
E2
1
2
10 IE1
2
+B
E2
VG
E2G
THA
5
4
1
1
E2
2
F4
9 IE1
2
3
1
F3
V
O
(∗1)
2
5 IE1
MREL
3 A
BATT
6 C
5 C
2 C
1 C
#1
#2
#3
#4
28 C
7 A
+BM
30 C
VG
E2G
29 C
32 D
THA
28 D
THW
E2
8 D
GE01
5 D
4 D
M+
20 D
M–
VC
5
G
D
BR
8 A
W
VTA2
4
LG
B
30 B
IGSW
VTA
6
W
G
L
W
R
BR
W
Y
R
L
9 A
V
O
+B2
M–
1
G
2 A
G
+B
O
GR
Y
R
1 A
M+
2
(∗2)
17
M
R
SCION tC (EM0300U)
2
1
F2
GR
1
M1
Mass Air Flow Meter
4
O
F1
K
2
IH1
R
V
O
G
G
LG
G
I
C6
Combination Meter
J
B
B
H
B
B
F
B
R
R
E
B
L
R
D
A
W
19 D
VTA1
VTA2
E 4(A), E 5(B), E 7(C), E 8(D)
IMI
16 B
IMO
15 B
FC
25 A
PRG
HA1A
23 C
1 D
A1A+
21 D
A1A–
HT1B
31 D
2 D
E1
OX1B
3 D
25 D
EOM
OC1–
12 D
W
Y
(∗2)
P
L
1
C2
Camshaft Timing
Oil Control Valve
C1
Camshaft
Position Sensor
2
1
2
BR
A
(∗2)
A
K1
Knock Control
Sensor (Bank 1)
1
(∗2)
A
C3
Crankshaft
Position Sensor
A
W
BR
(∗1)
L
GR
Y
R
R
A
(∗2)
G
6 IH1
A
13 D
26 D
G
2
(∗2)
E1
4
OC1+
G2+
NE–
34 D
R
G
1
2
(∗2)
+B
2
27 D
(∗2)
OX
R
3
HT
NE+
EKNK
30 D
W–B
(∗1)
L
1
29 D
(∗2)
B
AF–
4
L
(∗2)
+B
H5
Heated Oxygen Sensor
(Bank 1 Sensor 2)
AF+
2
W
3
HT
(∗2)
BR
L
Y
Y
Y
J8
Junction Connector
A
BR
Y
R
Q
O
P
GR
1
Y
O
Y
N
A3
Air Fuel Ratio Sensor
(Bank 1 Sensor 1)
V1
VSV (Purge)
M
1
O
G
R
L
GR
O
L
2
KNK1
29 A
W
G
W
W–B
W–B
G
BR
R
E
F
ED
M
217
Front Left Side
of the Cylinder Head
(Cont. next page)
9
12
11
10
G
A
G
W
B
W
BR
BR
B
21
IC2
LG
C
W
8 IC1
BR
W
W–B
P
2 BB1
8 BB1
5 BB1
1 BB1
P
8
22 IC2
3
11 IC2
VCP1
6
VCP2
19 A
VPA2
21 A
33 B
EPA2
CANH
W
27 A
EPA
B
20 A
3 IF1
R
VPA
R
18 A
V
VCPA
W
26 A
EP2
1
2 IF1
P
STP
B
4 B
VPA2
2
6 IF1
BR
ELS1
BR
15 A
ELS3
VCP2
4
1 IF1
W
MPMP
5 IF1
L
6 A
VPMP
L
3 B
5 A
B
PPMP
O
31 A
VC
L
18 D
G
LG
V
L1
EP1
3
G
4 IF1
Canister
Pressure Sensor
VPA1
5
L
A
Stop Lamp SW
< 11–4>
Leak Detection Pump
J7
Junction
Connector
G A
D
RR DEF I/UP
Fuse< 21–2>
TAIL Fuse
< 8–4>
Vent Valve
Y
M
A
34 B
CANL
E 4(A), E 5(B), E 7(C), E 8(D)
PSW
IGF1
32 C
23 D
IGT1
17 D
IGT2
16 D
IGT3
15 D
IGT4
14 D
ALT
10 D
STA
12 A
NSW
30 A
ST1–
SPD
8 B
E04
16 A
7 C
E01
7 D
F/PS
E02
32 B
6 D
THWO
14 B
ACT
AC1
24 B
25 B
TC
17 B
TACH
1 B
B
R
LG
P
R
A/C Control
Assembly< 25–4>
C A
Combination
Meter< 23–3>
C A
BR
BR
BR
W–B
W–B
Stop Light
System
< 11–4>
FAN NO. 2 Relay
< 24–3>
2
GR
J 4(A), J 5(B)
Junction
Connector
3
GR
BR
ST Relay< 1–2>
C B
Airbag Sensor Assembly
Center< 18–3>
5 IH1
1
FANH
14 A
9 IH2
BR
B
J7
Junction
Connector
B
BR
B
Y
P
B
BR
B
L
4
S8
Stop Lamp SW
Combination
Meter< 23–2>
ST Fuse< 1–2>
B
G
Generator< 2–3>
F
Ignition Coils
< 1–3> < 1–4>
P4
Power Steering
Oil Pressure SW
E
G
W
E03
4 C
20 IE2
8 IH2
1
ME01
3 C
W–B
W–B
L
V
Y
B
Y
LG
B
P
G
V
R
SCION tC (EM0300U)
15 IH2
D
G
1
18 IC2
G
6
LG
9
3 BB1
G
2
O
W–B
Y
4
R
Y
BR
20 IC2
B
C
A10
7 BB1
LG
Y
4 BB1
10 IC2
A
B
R
BR
W
W–B
W–B
BR
BR
Left Side of
the Cylinder Head
EE
ED
Front Left Side of
the Cylinder Head
E
F
G
H
I
J
218
3 tC (Cont' d)
3 tC (Cont' d)
M u ltip le x C o m m u n ic a tio n S y s te m (C A N )
13
A
B
C
D
16
15
14
G
BR
B
W
B
W
1 A
J13(A). J14(B), J15(C)
Junction Connector
2 A
ST Plug
2
2 B
B B
A B
B B
9
TC
26 1B
8 1E
3 1S
23 1B
6
A
CG
SG
7
4
5
J6
Junction
Connector
TS
12
A
W–B
R
BR
W–B
W
Skid Control ECU
with Actuator< 16–3>
Skid Control ECU
I
J
BAT
SIL
P
W
G
H
Skid Control ECU
G
Tire Pressure
Warning ECU
< 17–3>
F
B
CANH
14
16
TAC
D4
W
R
G
P
W
B
E
CANL
13 1E
W–B
D A
B
A B
E A
W
31 1E
P
12 1D
B
G
7 1E
J 4(A), J 5(B)
Junction
Connector
E A
1 C
P
W
G
W
G
G
R
W
B
B
BR
D B
B A
1 B
12 IE1
13
B A
3
G
Occupant
Classification
ECU< 18–7>
Combination
Meter< 23–3>
SCION tC (EM0300U)
Airbag Sensor
Assembly Center
< 18–2>
1
R
BR
W
W–B
BR
IF
Cowl Brace LH
M
219
E le c tro n ic a lly C o n tro lle d T ra n s m is s io n a n d A /T In d ic a to r
1
4
3
2
BR
L
ACC
4 1F
Y
ST1
9 IE1
V
O
BR
W
Y
W
R
LG
L
G
+B
2
1 A
BATT
7 A
9 A
34 C
+BM
IGSW
26 C
NC+
35 C
NC–
27 C
NT+
NT–
+B2
SL1+
2 A
11 C
SL1–
SL2+
10 C
14 C
SL2–
15 C
SLT+
12 C
SLT–
13 C
S4
8 C
DSL
9 C
THO1
24 C
E2
28 D
O
GR
E B
R
G
Y
V
GR
BR
V
LG
P
B
J 4(A), J 5(B)
Junction
Connector
E B
30A AM2
120A ALT
1
3 A
3
A A
1
2
E 4(A), E 5(B), E 7(C), E 8(D)
2
20A EFI
10A ETCS
1
2
2
7 1M
W
R
2
MREL
BR
2
17 1E
8 A
3
W–B
1 1F
BR
5
2
2
2
1
2
EFI Relay
IG1 Relay
25A AM1
R
W
V
V
1
10A GAUGE
5
1
G
15 1S
1
2
V
O
1 1G
3 IE4
L
SCION tC (EM0300U)
I5
Ignition SW
2
2
5 IE1
10 IE1
21 1E
3 1F
2
L
L
ST2
2
15A IG2
V
O
IG2 6
7 AM2
T3
(Turbine)
IG1 4
T2
(Counter Gear)
2 AM1
1
P
5
2
10
4
9
2
7
8
SL2–
SLT+
SLT–
S4
DSL
THO
E2
B
Y
BR
O
G
R
G
O
O
W–B
E1
Cowl Brace RH
IH
IF
Cowl Brace LH
EC
Front Left Fender
6
SL2+
BR
Battery
1
SL1–
11 1B
FL MAIN
3. 0W
3
SL1+
W
W–B
B
W–B
18 1E
A
220
(Cont. next page)
4 tC
4 tC (Cont' d)
(Cont. next page)
A
5
BR
8
7
6
BR
A
Engine Control System
< 3–7> < 3–8> < 3–9> < 3–10> < 3–11> < 3–12>
STP
30 A
12 A
NSW
STA
8 B
SPD
32 D
THW
8 D
GE01
5 D
4 D
M+
20 D
M–
VTA1
19 D
VTA2
18 D
VC
17 B
TC
26 A
18 B
VCPA
VPA
20 A
EPA
27 A
VCP2
19 A
VPA2
21 A
EPA2
E 4(A), E 5(B), E 7(C), E 8(D)
VG
28 C
E2G
30 C
THA
29 C
E04
7 C
ME01
3 C
EOM
E1
29 A
E03
3 D
4 C
E02
6 D
E01
7 D
R
D
3
2
L
11 B
21 B
19 B
10 B
9 B
LG
R
B
P
SCION tC (EM0300U)
4 B
G
B
B
J7
Junction Connector
B
< 3–7>
P
B
D
E
F
BR
BR
BR
L
W–B
(∗1)
W–B
W–B
6 IH1
W
B
C
5 IH1
BR
BR
(∗1)
C B
J 4(A), J 5(B)
Junction Connector
A
J8
Junction
Connector
A
A
C A
BR
BR
BR
EE
Front Left Side of
the Cylinder Head
ED
Front Left Side of
the Cylinder Head
ED
G
M
221
Left Side of
the Cylinder Head
A
BR
9
10
12
11
B
2
RB
P1
LL
2L
DL
NL
RL
PL
8
3
7
9
1
6
18 IH2
B
P
R
2 1D
A
W
11 1C
1 IH2
J3
Junction
Connector
19 1E
W
2 1C
17 IH2
W
P
O
5 1D
A
20 1E
6 1E
13 1C
9
2
B
G
G
W
P
ATD
LG
R
P
Transmission
Control SW
AT4
3
LG
J3
Junction
Connector
F
NSSD
O
E
S6
D
GR
C
R
B
L
LG
SCION tC (EM0300U)
A
10 1C
W
20 IH2
P
6 IH2
O
16 IH2
BR
GR
L
P
B
11 IH2
B
B
P
39
38
B
40
P
20
R
LG
19
Y
GR
L
18
37
C6
Combination Meter
BR
P
BR
R
N
D
3
2
L
1
G
16
B
Skid Control ECU
222
4 tC (Cont' d)
Memo
SCION tC (EM0300U)
223
P o w e r S o u rc e S y s te m
C ru is e C o n tro l
1
2
4
3
L
4 1F
1
2 AM1
IG1 4
Y
ST1
2
V
O
Y
(M/T)
W
Y
9 IE1
1 A
7 A
21 B
D
+BM
BATT
Stop Light System
< 11–4>
16 A
9 A
IGSW
ST1–
SL1+
+B2
11 C
2 A
SL1–
10 C
SL2+
14 C
SL2–
15 C
SLT+
12 C
SLT–
13 C
S4
8 C
W–B
W–B
B
18 1E
FL MAIN
3. 0W
11 1B
BR
W–B
Battery
EC
Front Left Fender
E B
J 4(A), J 5(B)
Junction
Connector
P
2
Cowl Brace LH
O
GR
BR
A A
IF
1
L
L
+B
2
1
IH
4
E 4(A), E 5(B), E 7(C), E 8(D)
E B
Cowl Brace RH
2
3
W–B
1
3 A
7 1M
30A AM2
120A ALT
1
G
17 1E
2
20A EFI
10A ETCS
1
2
2
(A/T)
2
MREL
W
2
BR
1 1F
8 A
3
2
2
V
O
IG1 Relay
25A AM1
R
W
V
V
1
LG
3
2
5
EFI Relay
5
7. 5A ECU–IG
2
2
20 IE2
18 IE2
R
(M/T)
W
R
1
3 IE4
2
5 IE1
24 1B
1 1G
2
2
10 IE1
I5
Ignition SW
3 1F
L
SCION tC (EM0300U)
ST2
L
S8
Stop Lamp SW
R
(M/T)
L
1 1M
9 1B
21 1E
G
L
IG2 6
V
O
7 AM2
Electronically Controlled
Transmission and
A/T Indicator System< 4–7>
C9
Cruise Control
Clutch SW
ACC
10A MET IG2
15A IG2
Y
(M/T)
and A/T Indicator System< 4–3> < 4–4>
DSL
9 C
THO1
24 C
E2
28 D
A
224
(Cont. next page)
5 tC
5 tC (Cont' d)
C ru is e C o n tro l
5
8
7
6
LG
A
LG
4
< 3–8> < 3–9> < 3–10> < 3–11> < 3–12>
C6
Combination Meter
CRUISE
GE01
5 D
4 D
M+
20 D
M–
19 D
VTA1
18 D
VTA2
17 B
VC
4 B
TC
STP
8 B
SPD
E 4(A), E 5(B), E 7(C), E 8(D)
E04
7 C
ME01
3 C
CCS
EOM
31 B
29 A
E1
E03
3 D
4 C
E02
6 D
1
BR
B
B
B
W–B
J7
Junction
Connector
B
B
BR
BR
BR
L
W–B
W–B
C A
19 IH2
6 IH1
C B
BR
BR
A
J8
Junction
Connector
– SET
J 4(A), J 5(B)
Junction Connector
5 IH1
BR
BR
Cruise Control SW
+ RES
ECC
S7
Spiral Cable
W–B
W–B
ON–OFF
A
A
BR
ED
Front Left Side of
the Cylinder Head
ED
Front Left Side of
the Cylinder Head
M
225
Left Side of
the Cylinder Head
34
4
CANCEL
EE
18 B
B
B
5
CCS
PI
E01
7 D
P
Y
SCION tC (EM0300U)
8 D
O p tio n C o n n e c to r
(F ro n t F o g L ig h t)
H e a d lig h t
1
4
3
2
B
B
2
2
1
2
1 1G
2
1
3
1
1
1
10A
H–LP
RH HI
10A
H–LP
LH LO
10A
H–LP
RH LO
5
2
2
2
2
2
2
2
2
1
7 1Q
4 1M
HL
H
T
EL
OFF
L
2
IF
Cowl
Brace
LH
Front
Left
Fender
EC
EB
Front
Right
Fender
11 IE2
P
W–B
P
W–B
W–B
IH
7 1M
W–B
W–B
Cowl
Brace
RH
5
Z1
Option Connector
(Front Fog Lamp)
W–B
17 1E
ILL–
Combination Meter
< 9–3>
Flash
16
LFG
6
B
O
Low
13
1
ILL+
31
R
High
V
7
+S
L
Tail
Head
O
HU
3
LG
HF
GR
7
12 1E
Battery
Z2
Option Connector
(Front Fog Lamp SW)
Dimmer SW
V
B
FL MAIN
3. 0W
17
8
C7
Combination SW
17 A
2
Light
Control SW
HEAD
1 IE2
W–B
HRLY
C6
Combination Meter
L
I 6(A)
Integration Relay
1
Beam
O
B
16 1C
2
1
34 1B
4
1J
R
40A
MAIN
W–B
30
16 1B
2
120A
ALT
15A
FR FOG
GR
O
12 1C
14 A
1
7. 5A
PANEL
B
R
25 1B
4
1E
2
H4
Headlamp (RH Low)
11 IE1
GR
2
H2
Headlamp (LH Low)
1
GR
R
2
H3
Headlamp (RH High)
P
1
H1
Headlamp (LH High)
Y
2
GR
B
W
SCION tC (EM0300U)
P
2
T–LP
Relay
2
2
2
Taillight System
< 8–2>
10A
H–LP
LH HI
G
G
H–LP
Relay
2
W
G
G
1
B
226
6 tC
7 tC
T u rn S ig n a l a n d H a z a rd W a rn in g L ig h t
1
P
W
Y
4
3
2
ACC
2 AM1
IG1 4
3 1F
1 1G
2
5
32 1B
1
ST1
I5
Ignition SW
1
W
+B
10A
GAUGE
IG1
Relay
25A
AM1
4
IG
FLASH Relay
LL
LR
3
3
27 1A
ER
GND
6
7
W–B
W–B
W–B
W–B
O
A 7(A), (B)
W–B
12 B (∗2)
W–B
W–B
W–B
II2
W–B
B
A
Front Left Side of
the Cylinder Head
W–B
A
W–B
ED
J9
Junction
Connector
Cowl Brace LH
GND
12 A (∗1)
A
BR
IF
BR
Turn
Signal
SW
G
2
J7
Junction
Connector
Quarter Panel LH
Hazard SW
2
BR
BI
2
5 IH1
BR
A
W–B
IH
W–B
Cowl Brace RH
Cowl Brace LH
IF
M
227
Front
Right
Fender
HAZ
B
J6
Junction
Connector
EB
J 4(A), J 5(B)
Junction
Connector
W–B
W–B
W–B
W–B
EC
C B
TR
25 A (∗1)
1
Side Turn
Signal Lamp
BR
W–B
C A
TB
II1
O3
Outer Rear View
Mirror (RH)
A
J10
Junction
Connector
Front
Left
Fender
C6
Combination Meter
Turn RH
1
O2
Outer Rear View
Mirror (LH)
A
Battery
6
25 B (∗2)
2
7 1M
RH
C7
Combination SW
33
Turn LH
Y
1
17 1E
LH
E A
G
Y
32
20 IB2
FL MAIN
3. 0W
E A
28 1E
3
TL
O
F A
Y
F A
J11(A), J12(B)
Junction
Connector
B
F A
G
F A
12 IB2
Side Turn
Signal Lamp
W–B
D B
2
R5
W–B
1
6
1
A B
G
F A
G
6
12 1S
GR
J 1(A), J 2(B)
Junction Connector
J11(A), J12(B)
Junction
Connector
1
4
Turn
1
4
Turn
120A ALT
10A TURN–HAZ
2
2
R4
2
T5
T4
2
Integration
Relay
< 15–8>
11 1S
LG
G
C B
1
5
17 1S
16 1S
13 1S
28 1A
Y
G
Y
W
P
SCION tC (EM0300U)
31 1B
A A
2
EL
8
1
1F
14 1B
2
EHW
2
228
8 tC
T a illig h t
1
4
3
2
T–LP
Relay
10A
TAIL
29 1A
15 1B
33 1B
10 1E
TRLY
BR
O
BR
I 6(A)
Integration Relay
TAIL
D A
13 A
D A
< 3–11>
J11(A), J12(B)
Junction Connector
BR
BR
BR
W
F B
F B
BR
14
2
6
6
BR
1
2
Tail
1
Tail
16
2
J11(A), J12(B)
Junction Connector
W–B
W–B
12 1E
FL MAIN
3. 0W
F A
17 1E
1
F A
Cowl Brace LH
EC
Front Left
Fender
EB
Front Right
Fender
Quarter Panel LH
A
A
BI
W–B
W–B
BJ
6
BA1
Quarter Panel LH
W–B
IF
W–B
W–B
IH
J10
Junction
Connector
Cowl Brace RH
1
W–B
7 1M
W–B
W–B
Battery
2
L3
BR
B
2
D B
L2
BR
W–B
W–B
W–B
P3
Parking Lamp (RH)
C7
Combination SW
1
2
6 BA2
R5
2
2
R4
Tail
Head
BR
EL
OFF
P2
Parking Lamp (LH)
120A
ALT
H
BR
T
2
Light
Control SW
SCION tC (EM0300U)
19
1 1G
W–B
BK
Left Side of the
Back Door Panel
9 tC
∗
∗
∗
∗
Illu m in a tio n
1
1
2
3
4
4
3
2
: w/ Front Console Illumination
: w/ Audio Steering Pad SW
: w/ Cruise Control
: w/o Cruise Control
V
L
Steering
Pad SW
IG1 4
4 1F
30 1B
W
W
L
Y
ST1
7 AM2
S7
Spiral Cable
W
ACC
2 AM1
IG2 6
IL+2
EAU
1
10
10A
MET
IG2
R
ST2
Audio
System
< 22–5>
V
(∗2)
R
V
2
3 1F
1 1G
1 1F
7 1P
1 1M
9 1P
5
8 1P
Illumination
ODO/TRIP
Illumination
G
R
G
(A/T)
4
Power
Circuit
ILL
ILL–
5 B
17 B (∗4)
Rheostat
Option Connector
(Front Fog Lamp SW)
< 6–4>
ILL–
17 A (∗3)
10 A
W
11
1
BR
W
O
BR
W–B
A
F A
F A
C A
A
B
5 IH1
J9
Junction Connector
H B
H B
J 4(A), J 5(B)
Junction
Connector
C B
BR
B
BR
W–B
W
J7
Junction
Connector
A
A
Battery
2
II2
LG
Taillight
System
< 8–2>
W–B
W–B
F B
J 4(A), J 5(B)
Junction
Connector
FL MAIN
3. 0W
2
ILL+
W
B
2
H A
W–B
2
LG
TAIL
13 A
I 6(A)
Integration Relay
TRLY
2
6 1D
19 B (∗4)
1
R 2(A), R 3(B)
19
1
A 7(A), (B)
A9
W–B
(A/T)
7 1M
19 A (∗3)
F5
BR–Y
(∗1)
1
17 1E
GR
(∗1)
D13
10A GAUGE
30A AM2
120A ALT
1
2 1Q
II1
2
30A DCC
1
1
GR
2
8 1Q
3
3
2
2
2
T–LP
Relay
IG1
Relay
R
W
L
1
2
LG
7. 5A PANEL
2
2
4
C6
Combination Meter
25A AM1
1
V
LG
R
6
3 IE4
2 1S
6 1P
2
10A ECU–B
SCION tC (EM0300U)
I5
Ignition SW
W
Cowl Brace RH
IH
IF
Cowl Brace LH
IH
Cowl Brace RH
ED
M
229
Front Left Side of
the Cylinder Head
V
L
LG
R
R
T7
O
O
(∗1)
R8
M 2(A), M 3(B)
Map Lamp
ON
OFF
DOOR
ON
OFF
R7
Room Lamp (Center)
DOOR
L
R
N2
Noise Filter (DOME)
L
2
V
BR
BR
L
W–B
D7
Diode (Room Lamp)
W–B
L
W–B
1
W
L
V
W–B
J 1(A), J 2(B)
Junction Connector
O
W–B
W–B
120A ALT
30A DCC
J6
Junction Connector
LG
L
BR
BR
A
B
2
R
B
(∗1)
Ignition
Key Cylinder
Lamp
1
W–B
B5
Courtesy SW
W–B
D10
Door Courtesy SW
Combination Meter
< 19–4>
Transponder Key
ECU< 3–4>
D9
Door Courtesy SW
(Driver' s Side)
W–B
W–B
IF
Cowl Brace LH
Left Side of the
Back Door Panel
BK
Cowl Brace LH
1
V
V
3 B (∗4)
1
4 A (∗3)
4 B
A
FL MAIN
3. 0W
1
1
8 BA2
18 IJ1
E B
I7
Ignition
Cylinder Lamp
L
IG1 Relay
25A AM1
10A ECU–B
2
A A
A A
C6
Combination Meter
V
7
2 1K
1 1K
7 1A
14 1C
6 1C
21 1A
7 1M
Door
V
ILL
23
7. 5A ECU–IG
BCTY
20
3
IF
IH
Cowl Brace RH
PCTY
26
1
7. 5A DOME
L
W
1 B (∗4)
SCION tC (EM0300U)
Battery
W
Y
W
V
SB
2
2
2
1
1
2
2
DCTY
1
3
8 A
2
2
I 6(A)
3 A (∗3)
5 1P
4 1P
5 1K
3 1P
2
GND
5
1
17 1E
1 1F
27 1E
LSDI
ECUB
SIG
2
1
3
1
Integration Relay
5 A
6
5
6
2 1S
30 1B
1 1G
3 1F
2
13
1B
SB
1 IC2
ST1
O
(∗2)
2
2
1
I5
Ignition SW
B
(∗2)
ACC
2
IG1 4
2 AM1
14
2
2
In te rio r L ig h t
4
3
2
1
: w/o Engine Immobiliser System
: w/ Sliding Roof
: w/o Sliding Roof
1
2
3
4
∗
∗
∗
∗
230
10 tC
11 tC
BR
ACC
W
2
IG1 4
2 AM1
Skid Control ECU
S8
Stop Lamp SW
L
L
L
P
(A/T)
B1
Back–Up Lamp SW
P1
Park/Neutral
Position SW
BR
P
L
L
10A GAUGE
10A STOP
J11(A), J12(B)
Junction
Connector
L
L
L
Shift Lock
Control ECU< 20–3>
J11(A), J12(B)
Junction
Connector
P
W–B
W–B
P
P
L
5
L
L
W–B
W–B
W–B
W–B
N3
Noise Filter
(DEF and Stop)
J11(A), J12(B)
Junction
Connector
C10
Center Stop Lamp
R5
Rear Combination
Lamp (RH)
Stop
R4
Rear Combination
Lamp (LH)
Stop
R5
Rear Combination
Lamp (RH)
Back–Up
Back–Up
R4
Rear Combination
Lamp (LH)
B
J11(A), J12(B)
Junction
Connector
W–B
W–B
W–B
W–B
W–B
2
W–B
W–B
Junction
Connector
M
231
Left Side of the
Back Door Panel
BK
BI
Quarter Panel LH
J10
A
J10
Junction
Connector
A
F A
F A
F A
F A
BI
Quarter Panel LH
Cowl Brace LH
IF
IH
Cowl Brace RH
BR
IG1 Relay
25A AM1
120A ALT
Battery
1
6
18 1S
2
D B
D B
7 BA2
A B
6
6
6
FL MAIN
3. 0W
C A
C A
5
3
3
B B
7 1M
17 1E
L
W
2
B B
2
B A
P
B A
30 1A
2
9 1A
2 1D
SCION tC (EM0300U)
1
3
1
W
Y
W
1
21 1B
5
2
2
12 1B
24 1E
1 IH2
2
1
P
(M/T)
15 1S
1 1G
18 1B
3 1F
1 1F
1
< 3–11>
B
(A/T)
R
I5
Ignition SW
B
(M/T)
ST1
4
3
2
1
S to p L ig h t
B a c k – U p L ig h t
BR
11 IH2
F ro n t W ip e r a n d W a s h e r
1
W
ACC
2 AM1
4
3
2
+B
IG1 4
+1
+2
+S
INT1
INT2
B1
MIST
OFF
INT
EW
WF
LG
I5
Ignition SW
Washer SW
Wiper SW
ST1
Off
On
LO
M
Wiper Relay
17
+1
7
2 IE1
1 IE1
B
2
1
4
3
B
+1
+2
S
1 1J
M
W–B
W–B
W–B
FL MAIN
3. 0W
E
W2
5
Battery
W–B
W–B
W–B
W–B
Cowl Brace RH
IH
IF
Cowl Brace LH
7 IE1
Y
R
B
7 1M
2
Y
3 IE1
2
17 1E
WF
11
2
W–B
B
W
1
EW
C8
Combination SW
16
G
3
36 1B
V
1
+S
8
G
L
5
IG1 Relay
2
2 1J
2 1B
30A FR WIP
2
25A AM1
1 1G
15A FR WSH
2
3 1F
+2
V
L
1 1F
120A ALT
SCION tC (EM0300U)
LG
W
Y
W
W
+B
EB
Front Right Fender
W1
Windshield Washer Motor
Y
1
HI
232
12 tC
13 tC
P o w e r W in d o w (w / J a m P ro te c tio n )
1
4
3
2
R
P9
20
IG
ACC
2 AM1
11 IB2
IG1 4
LG
ST1
W
SGND
PCT
12
6
GND
KOP
7
2
16
BR
GR
B
BR
V
O
W
17 IB2
20 IB2
13 IB2
3
PLS
6
PLS2
P
E
1
II2
120A ALT
10 1H
P10
(Front LH)
2 1M
4
II2
11
B
Integration Relay
< 15–6>
O
12
7 1M
II2
P
M
3
B
3
W–B
5
SSRB
BR
D
O
4
1
G
P
2
2
17 1E
MPX1
16 IB2
20A FL DOOR
IG1 Relay
1
PLS2
15
1 IB2
20A FR DOOR
5
25A AM1
2
PLS
5
6 1D
10A GAUGE
2
19
P
1 1G
Y
B
LG
W
3 1F
VC
11
U
W
P12
Power Window SW
2
PCT
MPX1
P
P
W–B
1
W–B
SCION tC (EM0300U)
1 1F
D
1
10
W–B
W
Y
H A
U
B
J 4(A), J 5(B)
Junction
Connector
F B
I5
Ignition SW
2
B
GND
U
7
D
6
1
4
5
SSRB
3
PLS
BR
4
D
8
LG
1
U
SGND
6
PLS2
E
W–B
W–B
Battery
PLS2
3
L
II2
PLS
5
R
2
2
VCC
G
Y
W–B
FL MAIN
3. 0W
A
A
IH
IF
Cowl Brace LH
Cowl Brace RH
IH
A
W–B
W–B
Cowl Brace RH
J6
Junction
Connector
J9
Junction
Connector
W–B
W–B
A
M
P11
(Front RH)
Cowl Brace LH
IF
M
233
234
14 tC
P o w e r W in d o w (w /o J a m P ro te c tio n )
1
4
3
2
P17
ACC
2 AM1
IG1 4
ST1
W
U
B
I5
Ignition SW
D
5
3
SD
6
8
W–B
II2
II2
9
II2
GR
Y
P
4
2
5
B
SD
SU
2 1H
DOWN
UP
W–B
W–B
P
2
P15
Power Window SW
11 1H
W–B
P
GR
P18
(Front LH)
B
G
120A ALT
7 1M
20 IB2
3 IB1
1
3
G
1
M
6
2
17 1E
1
GR
B
P
Y
G
30A POWER
PWR Relay
IG1 Relay
10A GAUGE
5
1
4 IB1
2
1 1G
25A AM1
2
E
10
W
Y
W
3 1F
2
W
SCION tC (EM0300U)
1 IB1
1 1F
SU
4
B
D
U
1
3
FL MAIN
3. 0W
Y
G
1
M
2
P16
Battery
W–B
(Front RH)
A
J6
Junction
Connector
W–B
W–B
A
W–B
Cowl Brace RH
IH
IF
Cowl Brace LH
Cowl Brace LH
IF
Memo
SCION tC (EM0300U)
235
∗ 2 : w/o Jam Protection
D o o r L o c k C o n tro l
1
4
3
2
V
W
V
IG1 4
ALTB
SIG
GND
KSW
ST1
4
5
1
9
UL1
UL3
LSWD
18 A
10
14 1H
4 1H
L
13 1H
2 A
W
4 1C
ACTD
20 A
5 1H
L
Y
1 1G
23 1E
B
3 1F
26 1E
B
10A ECU–B
BR
14 IB2
9 IB2
6 IB1
B
C
L
15 IB2
II1
BR
9
W
II1
P
10
L
B
18 IB2
5 IB1
P
L
W
V
G
B
Y
P
R
Transponder Key
ECU< 3–4>
W
2
19 IB2
L
3
V
1
IG1 Relay
2
GR
5
Combination Meter
< 19–4>
2
25A AM1
1
L
2
2
2
14 A (∗1)
3 A
1 A (∗1)
2 B
7 B (∗2)
6 B
5 B (∗2)
8
4
Detection SW
Key Unlock
7
W–B
W–B
BR
W–B
2
2 A (∗1)
3 B (∗2)
10
Key Lock
2 A (∗1)
1 B (∗2)
Unlock
1 B (M/T)
Lock
Unlock
1 A (A/T)
9
D13(A), D14(B)
4 A
2 B (M/T)
P 9(A), P17(B)
2 A (A/T)
Lock
W–B
1
U 1(A), (B)
Unlock Warning SW
7 1M
W–B
1
17 1E
120A ALT
30A DCC
SCION tC (EM0300U)
1 1F
L1
12
P
2
7. 5A ECU–IG
20A DOOR
W
Y
W
I5
Ignition SW
2
I 6(A)
Integration Relay
ACC
2 AM1
A
B
W–B
W–B
FL MAIN
3. 0W
20 IB2
W–B
Battery
A
W–B
W–B
J6
Junction
Connector
BR
A
A
W–B
Cowl Brace RH
IF
Cowl Brace LH
M
D11
Door Lock Assembly
(Driver' s Side)
W–B
IH
1
IF
Cowl Brace LH
D
236
(Cont. next page)
15 tC
15 tC (Cont' d)
D o o r L o c k C o n tro l
5
A
O p tio n C o n n e c to r
(T V IP )
B ack D oor O pener
W ire le s s D o o r L o c k C o n tro l
8
7
6
V
∗ 2 : w/ Sliding Roof
I 6(A)
Integration Relay
L2
UL2
KOF
TRLY
ILL
DCTY
PCTY
BCTY
19
7
26
20
23
HAZ
25
RDA
PRG
7 A
V
G
13 IC2
3
PRG
GND
+B
1
5
V
W–B
W–B
(∗1)
3
V
B
2
RDA
12 IC2
D8
GR
Z3
B6
Back Door Opener SW
1
1
IRSG
30 1B
J3
Junction
Connector
D
O
B5
M
2
6
D
14 IC2
4
ECUB
6 A
12 1H
Interior Light System
< 10–2> < 10–3>
HORN Relay
< 2–4>
Headlight System
< 6–1>
10 BA2
Y
O
2 BA1
M
D12
Door Lock Assembly
12 IC1
L
1
6 IC1
W
Key Unlock
Key Lock
8
R
4
5
II2
W
V
(∗1)
LG
(∗1)
6
10
(Driver' s Side)< 19–3>
II2
< 13–4>
11
Sliding Roof
Control ECU< 20–4>
II1
W
7
R
LG
(∗1)
II1
BR
(∗1)
Y
(∗2)
BR
8
W–B
W–B
W–B
D
9 1E
L
HORN
4 A
R
4 1K
HRLY
14 A
B
9 1H
TVSS
9 A
GR
17 1H
O
(∗1)
SCION tC (EM0300U)
B
C
8 1H
SPD
11
FLASH Relay
< 7–4>
16 1H
BDSU
19 A
Interior Light System
< 10–3>
6 1H
BACT
1 A
Taillight System
< 8–2>
7 1H
DBKL
21 A
W
13
Combination Meter
< 23–2>
3
O
2
LG
ACT–
16
R
ACT+
14
W–B
2
II2
W–B
W–B
J9
Junction
Connector
A
W–B
A
A
W–B
IH
J10
Junction Connector
Cowl Brace RH
BK
BI
Quarter Panel LH
M
237
Left Side of the
Back Door Panel
C6
Combination Meter
ABS
Combination Meter
< 23–5>
Combination Meter
< 23–2>
Stop Lamp SW
< 11–4>
W
V
O
R
W
R
W
Y
R
W
B
SB
V
O
L
P
W
L
W
B
Y
BR
L
B
(A/T)
LG
B
Y
G
LG
W–B
W–B
BR
W
R
P
L
BR
Y
Y
B
B
(A/T)
30A AM2
120A ALT
B
BR
J7
Junction Connector
BR
W
B
S3
W
S18
B
P6
Parking Brake SW
B
S19
Combination Meter
< 4–12>
B
Y
R
W
B
B
J 4(A), J 5(B)
Junction Connector
7. 5A ECU–IG
IG1 Relay
25A AM1
40A ABS NO. 2
50A ABS NO. 1
S2
W–B
W–B
W–B
Battery
ED
Front Left Side
of the
Cylinder Head
Front Right Fender
EA
Cowl Brace LH
IF
IH
Cowl Brace RH
1
1
2
2
1
1
5 IH1
19 IJ1
9 IJ1
3 IC2
4 IC2
2
18 IE2
16 IE2
4 IE2
5 IE2
2 IE2
3 IE2
1
2
2
FL MAIN
3. 0W
7 1M
17 1E
1 1F
Data Link
Connector 3
< 3–14> < 3–15>
1 1M
C A
FL–
8
3
1
13
32
SCION tC (EM0300U)
1
1
W
PN
PKB
RR–
6
18
34
33
12
RR+
RL–
RL+
FR–
FL+
9
FR+
11
30
31
GND1
2
24
GND2
WA
BRL
SP1
STP
TC
26
10
16
14
15
23
D/G
TS
+BM
+BS
IG1
13 IE2
17 IE2
15 IE2
12 IE2
3 IE4
1
13
ST2
C B
2
2
10A MET IG2
ST1
1
25
5
W
1
1
4 1F
ACC
4
3
2
1
S1
2
2
LG
I5
Ignition SW
24 1B
2
2
2
L
IG2 6
7 AM2
1 1G
2
IG1 4
2 AM1
3 1F
2
ABS
LG
4
238
16 tC
17 tC
T ire P re s s u re W a rn in g S y s te m
1
4
3
2
L
4 1F
IG1 4
7 AM2
IG2 6
10A MET IG2
2 AM1
L
1 1M
LG
W
Y
W
R
I5
Ignition SW
4
1 1G
7 1S
F B
2
3
SPD
TC
10
BR
IG
1
LG
7
P
17 1E
G
1 1F
L
3
36
R
2
7. 5A ECU–IG
1
IG1 Relay
5
25A AM1
30A AM2
120A ALT
2
C6
Combination Meter
3 1F
Tire Pressure
2
J 1(A), J 2(B)
Junction
Connector
H A
2
Date Link
Connector 3
< 3–13>
Combination Meter< 23–2>
Y
R
W
SCION tC (EM0300U)
3 IG4
5
SIL
IND
T11
7 1M
1
GND2
6
11
RDA
12
GND
9
W–B
V
BR
C B
C B
BR
2
13 IJ1
15 IJ1
14 IJ1
5 IH1
BR
V
5
4
1
+5V
GND
RDA
1
W–B
BR
O
T6
Tire Pressure
Warning SW
W–B
W–B
FL MAIN
3. 0W
O
GR
W
RF5V
Battery
A
J9
Junction
Connector
A
IH
IF
Cowl
Brace LH
Cowl
Brace RH
IH
B
J7
Junction
Connector
B
T12
Tire Pressure Warning
Antenna and Receiver
BR
W–B
Front Left
Side of the
Cylinder Head
ED
M
239
Cowl
Brace RH
J 4(A), J 5(B)
Junction
Connector
B
C A
CLSW
SRS
1
4
3
2
R
R
LG
7 AM2
IG2 6
Engine Control
Module< 3–11>
12 1H
ST2
LG
L
30 1B
I5
Ignition SW
R
G
4 1F
ESL
2
1
2
ESR
A18
Airbag Sensor
(Rear LH)
VUCL
1
2
1
2
1
2
ESCL
1
Y–B
(∗1)
3 A
5 C
6 C
B
(∗1)
Y
(∗1)
4 A
1 IK1
W
(∗1)
Y–B
(∗1)
2 IK1
C12
Curtain Shield
Airbag Squib
(RH)
Y
(∗1)
1 ID1
C11
Curtain Shield
Airbag Squib
(LH)
B
(∗1)
W
(∗1)
2 ID1
VUPR
B
(∗1)
15 1E
VUPL
W
(∗1)
3 1E
16 1E
1 1M
1
S10
Side Airbag
Sensor (RH)
Y
10A ECU–B
R
B
(∗1)
W
(∗1)
B
(∗1)
W
(∗1)
G
W
P
B
LG
2
L
4
C6
Combination Meter
2
2
SRS
2
2
30A AM2
16 B
TC
22 B
SIL
19 A
21 A
VUPD
GSW2
22 C
ESD
VUPP
20 C
ESP
ICD+
ICD–
ICP+
ICP–
20 A
VUCD
22 A
ESCD
A11(A), A12(B), A13(C)
LA
D+
D–
14 B
5 B
6 B
D2+
8 B
D2–
7 B
P+
P–
4 B
3 B
1 IE3
PD+
5 A
PD–
6 A
2 IE3
Y
4 IE3
–SR
27 B
Y–B
3 IE3
+SR
29 B
B
4 IG1
–SL
28 B
W
3 IG1
30 B
R
2 IG1
+SL
P2–
2 B
G
1 IG1
Y–R
Y–G
Y–R
32 1E
Y
R
BR
Y–B
1
P2+
1 B
Y
Y–B
29
IG2
O
1
1
15 B
21 B
Y–G
30A DCC
SCION tC (EM0300U)
3 IE4
Data Link
Connector 3
< 3–14>
2
15A IG2
10A MET IG2
2
1 1D
S9
Side Airbag
Sensor (LH)
2
5 IH1
BR
Battery
A16
Airbag Squib
(Steering Wheel Pad)
B
J7
Junction Connector
B
BR
ED
Front Left Side of
the Cylinder Head
B
1 B
W
2 B
R
1 A
G
2 A
Y–G
C B
3
Y–R
4
Spiral
Cable
Y
2
Y–B
1
14 1S
BR
J 4(A), J 5(B)
Junction Connector
B
FL MAIN
3. 0W
C A
2
1
2
1
+SL
–SL
+SR
–SR
A14(A), A15(B)
A4
Airbag Squib
(Front Passenger' s
Airbag Assembly)
Airbag Sensor
(Front LH)
A5
Airbag Sensor
(Front RH)
1
2
P13
Pretensioner
(LH)
A
B
240
(Cont. next page)
18 tC
18 tC (Cont' d)
SRS
5
A
B
8
7
6
R
LG
R
J3
Junction
Connector
D
A 7(A), (B)
Combination Meter< 19–3>
F6
(Driver' s Side)
A19
VUCR
ESCR
A/BOFF
36 A (∗2)
35 B
36 B (∗3)
4 IJ1
2 IM1
O
3
2
1
3
3 IM1
O
L
W
G
SB
R
G
LG
R
L
2
L
3
O8
Sensor Front RH
2
1
R
B
(∗1)
W
(∗1)
4
BR
Y
1 IM1
B
W
R
G
O
21 C
VUCP
10 A
19 C
18 A
DBE+
ESCP
9 A
DBE–
17 A
DSP+
13 B
DSP–
23 B
PBEW
17 B
PAON
P–AB
24 C
16 C
FSP–
FSP+
8 A
FSR+
4 A
FSR–
7 A
1 A
IG
+B
PP+
PP–
SFD+
SFD–
SFP+
SFP–
7 B
SIG1
DK+
1 B
SGD1
DK–
12 B
SVC2
E1
E2
25 B
26 B
GND
DIA
3 A
2 A
BSW
9 A
BGND
5 A
SVC3
5 B
SIG3
9 B
SGD3
3 B
SVC4
6 B
8 B
SIG2
SIG4
10 B
2 B
SGD2
SGD4
4 B
BR
R
V
W
W
Y
(∗1)
10 B
Y
Y–B
(∗1)
9 B
GR
7 C
SVC1
GR
8 C
B
2 A
W–B
1 A
Y
(∗1)
3 C
Y–B
(∗1)
4 C
11 B
O 4(A), O 5(B)
A11(A), A12(B), A13(C)
BR
W–B
Y–G
Y–R
Y
Y–B
SCION tC (EM0300U)
1
O6
Sensor Front LH
3 IJ1
BR
1
A/BON
Y
2
35 A
BR
Seat Position
Airbag Sensor
Buckle SW
D
Airbag ON/OFF
Indicator
LG
Airbag Sensor
(Rear RH)
6 IJ1
5 IJ1
2
1
R
1
2
1
2
1
2
1
1
2
2
3
1
2
3
W–B
14 1E
S11
Side Airbag
Squib (LH)
S12
K2
Side Airbag
Squib (RH)
Knee Airbag
Squib
30 1E
A
IF
W–B
IH
A
W–B
W–B
Cowl Brace RH
7 1M
J9
Junction
Connector
17 1E
Cowl Brace LH
Data Link Connector 3< 3–13>
P14
Pretensioner
(RH)
F8
O7
Sensor Rear LH
O9
Sensor Rear RH
IH
M
241
K e y R e m in d e r a n d
L ig h t R e m in d e r
S e a t B e lt W a rn in g
1
242
19 tC
4
3
2
V
L
V
2 AM1
30 1B
4 1F
ACC
IG1 4
ST1
7 AM2
10A
MET
IG2
IG2 6
2
L
Illumination System
< 9–4>
ST2
2 1S
1 1M
V
P
4
1 1F
1
3 1F
1 1G
C6
Combination Meter
3
2
5
2
2
17 1E
2
IG
Passenger' s
Seat Belt
Warning Lamp
SEAT
38 A (∗1)
7 1M
Power
Circuit
Buzzer
38 B (∗2)
2
2
24
1
5
22
Cowl Brace LH
Front Left Side of
the Cylinder Head
ED
Unlock Warning SW
< 15–3>
IF
2 IC2
L
A
J10
Junction
Connector
BR
IH
Y
W–B
J7
Junction
Connector
B
L
F7
Front Seat
Inner Belt
(Driver' s Side)
Buckle
SW
BR
1
B
Battery
Door Courtesy SW
(Driver' s Side)
< 10–3>
C
L
BR
W–B
W–B
B
FL MAIN
3. 0W
BR
C
2
5 IH1
7
C
R
BI
Quarter Panel LH
SRS System< 18–6>
C B
J1
Junction
Connector
2
J 4(A), J 5(B)
Junction
Connector
1
L
Integration
Relay< 15–6>
C A
Cowl Brace RH
8
BR
P
L
30A AM2
120A ALT
30A DCC
1
3
20 B (∗2)
A 7(A), (B)
1
10A GAUGE
25A AM1
R
W
IG1
Relay
Driver' s
Seat Belt
20 A (∗1)
2
6
1 1P
2
1
LG
I5
Ignition SW
3 IE4
L
SCION tC (EM0300U)
10A ECU–B
W
Y
W
R
2
20 tC
S h ift L o c k
1
S lid in g R o o f
4
3
2
GR
ACC 3
2 AM1
GR
5 1F
IG1 4
W
7. 5A ACC
ST1
I5
Ignition SW
D A
F B
B B
P
IG
Y
G
O
8
1
2
6
PWS
SPD
L
GR
IG1 Relay
J 1(A), J 2(B)
Junction
Connector
3
H A
B
1
7 1S
Combination
Meter< 23–2>
GR
B
5
3 1K
7. 5A ECU–IG
2
6 1K
20A S/ROOF
1 1G
25A AM1
3 1F
Stop Lamp SW
< 11–4>
B
O
G
W
Y
W
W
6
7
ACC
STP
5
IG
+B
2
S13
SLS+
Shift Lock Solenoid
2
120A ALT
17 1E
S6
1 1K
W–B
U 1(A)
Unlock Warning SW
J9
Junction
Connector
A
W–B
W–B
W–B
W–B
IF
M2
Map Lamp
W–B
W–B
W–B
A
Cowl Brace LH
CLOSE
OPEN
Key
Interlock
Solenoid
A
J6
Junction
Connector
W–B
W–B
IF
2
Sliding Roof
Control SW
5
A
IH
W
B
R
W–B
B
1
3 A
Battery
E
7
8
4 A
Cowl Brace RH
10
E
12
FL MAIN
3. 0W
CLOSE/DOWN
9
SLS–
KLS+
2
OPEN/UP
M
W–B
1
7 1M
W–B
W–B
SCION tC (EM0300U)
1 1F
Integration Relay
< 15–6>
14 1D
Cowl Brace LH
IH
Cowl Brace RH
M
243
R e a r W in d o w D e fo g g e r
1
GR
IG1 4
Y
4
3
2
ACC 3
C ig a re tte L ig h te r
GR
2 AM1
R e m o te C o n tro l M irro r
ST1
5 1F
W
W
Y
3 1F
1 1G
2
5
15A CIG
1 1F
7. 5A ACC
I5
Ignition SW
1
8
B
2
2 1F
RH
LH
HL
HR
VL
RH
11 1M
2
2
VR
M+
E
6
7
3
4
L
V
B
Y
LG
P
5
B
Rear Window
Defogger SW
1 BA1
A
A
J6
Junction
Connector
A
W–B
R
R
Y
II1
3
II1
4 IB2
5
MH
M
M
4
BR
W–B
COM
4
W–B
COM
O
BR
M
3
MV
O3
Outer Rear View
Mirror (RH)
M
R
Cowl Brace RH
4
L
IH
V
IF
3
MV
O
Cowl Brace LH
5
MH
O2
Outer Rear View
Mirror (LH)
IH
II1
LG
W–B
Cowl Brace RH
W–B
J9
Junction
Connector
A
5
7 IB2
L
B
Battery
A
J9
Junction
Connector
1
R6
W–B
W–B
W–B
N3
Noise Filter
(DEF and Stop)
6 IB2
1
A
B
B
B
12
FL MAIN
3. 0W
G B
LG
GND
1
W–B
2
B
A7
A/C Control
Assembly
RrDEF
G A
J 4(A), J 5(B)
Junction
Connector
1
G A
< 3–11>
7 IC1
BR–Y
B
B
120A ALT
5
C4
Cigarette
Lighter
W–B
12 1Q
MV
LH
2
Select SW
7 1M
Operation SW
17 1E
Right
/Down
MH
2
Left
/Up
Down
Up
DEF
Relay
Right
7. 5A
RR
DEF
I/UP
Left
10A
GAUGE
B
O1
Outer Mirror SW
3
3 1Q
L
1
30A
DEF
W
SCION tC (EM0300U)
25A AM1
4 1S
IG1
Relay
IF
Cowl Brace LH
IH
Cowl Brace
RH
244
21 tC
Memo
SCION tC (EM0300U)
245
P o w e r O u tle t
1
A u d io S y s te m
ACC 3
2 AM1
GR
IG1
5 1F
Combination
Meter< 23–2>
25A AM1
15A
ACC SOCKET
J1
Junction
Connector
A17
Antenna Amplifier
8 IE1
1
6 1S
1
2
3
2
2
2
GND
7 A
8 A
+B
FL+
3 C
SPD
ANT
FL–
2 A
FR+
6 A
FR–
1 A
RL+
5 A
RL–
2 B
6 B
RR+
RR–
1 B
3 B
W
R
Y
BR
L
LG
V
P
BR
W–B
O
120A ALT
30A DCC
1
4 A
ACC
Y
W
2
3 A
R 2(A), R 3(B), R 9(C)
Z 5(D)
Option Connector
(Radio Receiver Assembly)
O
1
L
P8
Power Point Socket Relay
1 1G
5
GR
GR
R
2
L
1
1
+ACC
2
Instrument Panel
Brace LH
11 IJ1
1
W
IG
S14
Speaker
(Front Door LH)
1 IJ1
R
3
Y
2
BR
BR
W–B
Cowl Brace LH
2
10 IC1
L
1
IF
4
LG
V
A
9 IC1
T10
Tweeter (RH)
1
II2
L
3
12
LG
2
P
J6
Junction
Connector
Battery
II2
T9
Tweeter (LH)
A
A
7
V
4
W–B
W–B
FL MAIN
3. 0W
7 IB1
P
B
E
2
2 IB1
P7
Power Point Socket
SCION tC (EM0300U)
20A RAD NO. 1
7. 5A ACC
D
D
L
GR
14 1D
GR
W
R
L
I5
Ignition SW
1 1F
6 1M
2
GR
ST1
2
4
3
2
1
2
1
2
1
2
S15
S16
S17
Speaker
(Front Door RH)
Speaker
(Rear LH)
Speaker
(Rear RH)
246
(Cont. next page)
22 tC
22 tC (Cont' d)
A u d io S y s te m
5
8
7
6
∗ 1 : w/ Audio Steering Pad SW
Z4
FWGD
ACID
1
FWPW
3
4
ACPW
6
ACDT
DGND
SGND
10
14
16
DOTX
8
DORX
9
DOGD
7
AUDL
AUDR
AGND
11
12
13
GR
LG
8 D
9 D
7 D
DOTX
DORX
DOGD
17 C
ARI
15 C
AUDR
ASGN
16 C
2 IL1
13 D
AGND
AUXI
19 C
3 IL1
W
1 IL1
12 D
BR
AU2
ALI
R 2(A), R 3(B), R 9(C)
Z 5(D)
Option Connector
(Radio Receiver Assembly)
AUDL
R
G
(∗1)
11
EAU
11 D
(Shielded)
SGND
W
16 D
B
O
(∗1)
10
4 IL1
L
R
BR
W
Steering Pad SW
Seek–
DGND
L
P
(∗1)
12
Seek+
14 D
(Shielded)
8 C
6 C
AU1
ACDT
SW2
SWG
7 C
10 D
R
ACPW
L
6 D
FWPW
V
SW1
4 D
BR
ACID
P
3 D
FWGD
Y
L
G
R
SCION tC (EM0300U)
1 D
1
2
ALO
ARO
ASGN
AUXO
3
4
MODE
S20
Stereo Jack Adaptor
Volume+
Volume–
S7
Spiral Cable
M
247
V
R
2
MAINT
REQD
Driver' s
Seat Belt
SRS
Fuel
Tire Pressure
Temp.
G
R
SB
B
O
9 IC2
Seat Belt Warning
System< 19–3>
SRS System< 18–2>
Seat Belt Warning
System< 19–2>
Tire Pressure
Warning System
< 17–4>
Key Reminder
System< 19–4>
Light Reminder
System< 19–4>
Key Reminder
System< 19–4>
Light Reminder
System< 19–4>
Engine Control
Module< 3–11>
R
P
J 1(A), J 2(B)
Junction Connector
Fuel
Sender
Sliding Roof
Control ECU
< 20–4>
Radio
Receiver
Assembly
< 22–4>
A/C Control
Assembly
< 25–6>
Tire Pressure
Warning ECU
< 17–3>
Engine
Control
Module< 3–10>
Integration
Relay
< 15–6>
F9
Fuel Suction Pump
and Gage Assembly
Y
O
L
V
Skid Control ECU
Engine Control
Module< 3–13>
V
3
22
5
29
24
36
7
8
21
2
23
26
2
Illumination
System< 9–4>
Battery
Fuel
Tachometer
L
B
1 1E
G B
G B
G B
Speedometer
SCION tC (EM0300U)
13 1A
7 IA1
O
O
25
27
11
8 1C
8 1D
G A
G A
FL MAIN
3. 0W
V
LG
Illumination
ODO/TRIP
Illumination
30A
AM2
30A
DCC
Buzzer
R
Rheostat
2
2
3
4
6
ODO/TRIP
Power
Circuit
L
2
2
10A
MET
IG2
ST2
C6
Combination Meter
10A
ECU–B
30 1B
4 1F
4
3
2
1
2 1S
1 1M
Illumination
System< 9–4>
2
L
IG2 6
7 AM2
V
I5
Ignition SW
2
C o m b in a tio n M e te r
2
1 1C
248
3 IE4
1
1
1
(Cont. next page)
23 tC
23 tC (Cont' d)
C o m b in a tio n M e te r
Headlight
System< 6–3>
Beam
P
R
N
D
3
2
L
Turn RH
Turn LH
CRUISE
Charge
BR
W
Headlight
System< 6–3>
BR
BR
BR
Electronically Controlled
Transmission and A/T
Indicator System< 4–11>
J 4(A), J 5(B)
Junction
Connector
Engine Control
System< 3–5>
B
ABS System
< 16–4>
B2
Brake Fluid Level
Warning SW
R
W–B
E3
Engine Oil
Pressure SW
Charging System< 2–3>
Cruise Control
System< 5–7>
B
1
Skid Control ECU
Interior Light
System< 10–3>
2
B
V
J7
Junction Connector
1
Oil Pressure
ABS
BRAKE
Door
SCION tC (EM0300U)
13 IH2
Front Left Side of
the Cylinder Head
ED
EB
M
249
Front Right
Fender
5 IH1
B
C B
22 1B
C A
5 1C
30
37
38
39
40
31
16
1
34
15
17
9
13
12
10
14
and A/T Indicator System< 4–10> < 4–11>
Turn Signal and
Hazard Warning Light
System< 7–3>
20
19
18
33
32
C6
Combination Meter
8
7
6
5
R a d ia to r F a n a n d C o n d e n s e r F a n
1
Y
Y
W
Y
2
FAN NO. 3
Relay
3
2
2
2
L
30A RDI
L
IG1 Relay
25A AM1
1
7. 5A ECU–IG
30A CDS
W–B
3
2
W–B
1
1
W
W
5
5
W
2
5
4
2
2
24 1B
W
1 1G
L
3 1F
FAN NO. 2
Relay
FAN NO. 1
Relay
1 1F
2
2
3
2
2
2
2
2
2
1
Y
W
Y
W
W
LG
R
2
Engine Control
Module< 3–11>
O
B
GR
L
120A ALT
SCION tC (EM0300U)
1
R
2
1
3
2
L
2
5
2
Y
IG1 4
I5
Ignition SW
2
Y
Y
LG
ACC
ST1
2
4
3
2
2 AM1
250
24 tC
8 EA1
1
17 1E
7 1M
2
W
W–B
W–B
B
3
1
3
R
W
L
D5
Diode (Fan)
2
A2
A/C Condenser
Fan Motor
M
1
W–B
R1
Radiator Fan Motor
M
1
2
2
P5
Pressure SW
2
FL MAIN
3. 0W
W–B
Battery
W–B
W–B
W–B
Cowl Brace RH
IH
IF
Cowl Brace LH
EC
Front Left Fender
W–B
MG/C Relay
< 25–3>
W–B
W–B
Memo
SCION tC (EM0300U)
251
A ir C o n d itio n in g
1
4
3
2
V
O
3 1D
B
W
BR
ACC
3
IG1 4
O
B
P
O
L
W
W
Y
V
F B
FRS
B
I5
Ignition SW
2
M
3 1F
1 1G
1 1F
2 1P
1 1L
1 1P
29 1B
7 1S
REC
2 IH2
1
IG1
Relay
2
2
4
HTR
Relay
3
3
3
2
2
3
2
16 A
10 A (∗1)
40 B
16 B
10 B (∗2)
REC
FRS
11 A
6 A
MGC
BLC
9 A (∗1)
11 B
6 B
9 B (∗2)
+B
ACT
AC1
A 7(A), (B)
L
BR
7 1F
40 A
4 B
BR
1
G
7 1M
G
W
120A ALT
40A HTR
30A DCC
17 1E
5 1Q
3 IH2
1
4 A
3 B
FrHR
1
3
2
3 A
20 B
MG/C
Relay
2
1
20 A
IG
2
P
5
LG
5
V
L
L
W
2
R
3
1
L
3
2
5
2
P
R
BR
10A A/C
1
7. 5A ECU–IG
10A GAUGE
25A AM1
10A ECU–B
SCION tC (EM0300U)
2
Engine Control
Module< 3–12>
ST1
J 1(A), J 2(B)
Junction
Connector
H A
4 EA1
D1
2 AM1
30 1B
6 EA1
R
+B
3
VM
GND
4
1
B
L
BR
L
W–B
W–B
B
Diode (Fan)
< 24–4>
A1
A/C Compressor
2
SI
BR
1
B4
2
1
2
B3
M
Blower
Motor
1
W–B
FL MAIN
3. 0W
L
L
L
W–B
Battery
Cowl Brace RH
IH
IF
Cowl Brace LH
Cowl Brace RH
IH
A
252
(Cont. next page)
25 tC
25 tC (Cont' d)
A ir C o n d itio n in g
5
8
7
6
2
Seat Belt Warning System
< 19–2>
2
SCION tC (EM0300U)
A8
A/C Thermistor
No. 1
LG
System< 21–2>
19 IE2
Engine Immobiliser
System< 3–4>
SB
G
9 IE2
SRS System< 18–6>
Combination Meter
< 23–2>
1
Turn Signal and Hazard
Warning Light System< 7–4>
A6
1
O
B
P
B
23 A
31 A (∗1)
23 B
31 B (∗2)
TAM
A 7(A), (B)
18 A
35 A
36 A
25 A
27 A
5 A
38 A
24 A
32 A (∗1)
18 B
35 B
36 B
25 B
27 B
5 B
38 B
24 B
32 B (∗2)
SG–TAM
GND
SPD
AOF
AOD
A/BON
A/BOFF
S5–TPM
SG–TPM
29 A
33 A
22 A
21 A
14 A
30 A
13 A
PRS
37 A (∗1)
12 B
1 B
2 B
34 B
29 B
33 B
22 B
21 B
14 B
30 B
13 B
37 B (∗2)
2
VZ
3
GND
G
1
MAXCOOL
B
4
MAXHOT
TP
Y
5
Pl
V
G
3
GND
GR
1
VZ
V
G
L
LG
W
W–B
2
SG–TP
SG–TE
34 A
DEF
S5–TP
TE
2 A
4
AMC
SEAT
1 A
FACE
AMH
RrDEF
12 A
5
TPM
SECU
HAZ
14 IE2
Pl
V
1
M
D3
D2
P5
Pressure SW
M
A
J9
Junction
Connector
A
W–B
4
W–B
A
W–B
EC
Front Left Fender
M
253

m overall electrical wiring diagram

Transcription

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