1 IS 300 ELECTRICAL WIRING DIAGRAM

1 IS 300 ELECTRICAL WIRING DIAGRAM
L–R
W
B–L
W–L
B–R
To Engine
Control
Module<2–12>
W–R
B–W
R–L
B–W
B–W
R–L
E4 B , E6 D
L–R
G
B
J1 A , J2 B
B–L
W–L
R–L
B
(M/T)
GR–B
B–R
B–Y
B–L
JUNCTION CONNECTOR
ENGINE CONTROL MODULE
N1
NOISE FILTER
(Ignition)
B–W
I4
IGNITION COIL NO. 3
I3
IGNITION COIL NO. 2
I2
IGNITION COIL NO. 1
B
(M/T)
B
(A/T)
1
2
BR
B–W
(M/T)
Front side of the
intake manifold
EA
B–R
C14
CLUTCH START SW
P1
PARK/NEUTRAL
POSITION SW
B–Y
B–L
7
B–W
B–W
B–W
(M/T)
B–W
(A/T)
W–B
B–Y
40A MAIN
20A AM2
120A ALT
7. 5A ALT–S
IN1
3
3
S B
BATTERY
IGF
4
GND
IG B
To Engine Control Module
<2–11><2–12>
F A
IN3
5
6
B(A/T)
B(M/T)
See Multiplex
Communication
System<10–3>
B–W
B–W
(A/T)
B(M/T)
B(A/T)
B(A/T)
STARTER
RELAY
J19
JUNCTION CONNECTOR
J19
JUNCTION CONNECTOR
B(M/T)
W–R
W
B–L
1
L B
15 IG1
STARTER
GENERATOR
G1 A , G2 B
W–B
To Multi
–Display
<25–2>
Cowl side
panel RH
IH
3 EA1
D B
+B
C1
I1
IGNITER
IN2
9
10
2
1
2
2
2
2
6
C
C3
6 EA1
RL
15 D
N
9 1K
2002 LEXUS IS 300 (EWD451U)
W–L
C
1
1
1
1
B–W
B–W
MPX2
P
1 A
B
S1 A , S2 B
11 A
B
B–R
2 EA1
20 B
C
C2
8 EA1
C
1
2
10A
GAUGE
40A AM1
8 1K
1 1O
5 1K
7. 5A
STARTER
B–W
B–W
1
9
3
C
1
2
1
5
1
1
2
1
2
1
20 IA3
1
5 1D
4 1D
I12
IGNITION SW
2
1 1D
B–R
B–W
C
1
1
1
1
1
2
2 1D
9 EA1
IG2 6
ST2 8
7 AM2
L–R
IG1 4
2 AM1
4
3
2
1
C harging
S tarting and Ignition
P ow er S ourc e
W–L
B–L
ACC
M
25A
EFI
1
B–Y
2002 LEXUS IS 300 (EWD451U)
Left quarter panel LH
L–R
FUEL PMP
RELAY
L–R
B–L
Cowl side
panel RH
R–L
CIRCUIT
OPENING
RELAY
Center side of the
intake manifold
EB
C9
MALFUNCTION
INDICATOR LAMP
[COMB. METER]
W–B
W–B
IH
B–R
B–R
B–R
1
19 IA3
BR
1 EA1
Cowl side
panel RH
5 2B
1 2E
IH
W–B
BL
J15
JUNCTION
CONNECTOR
W–B
A
11 2B
2
TC
B–R
13
R–W
5
B–Y
2 2I
1
BR
7 2I
G–W
3
CG
4
8
2G
B
SIL
B–R
B–R
7
WFSE
15
TS
14
A/B
6
LG
F15
M FUEL PUMP
2
B–R
4 2B
3
SG
5
TAC
9
5 2E
8 2M
4
EA3
B–R
4
EA1
To Combination
Meter<22–2>
4
4 1I
2
B–R
2 1G
L–R
2
7
D5
DATA LINK
CONNECTOR 3 16
BAT
BR
BATTERY
G–R
2
1
17
R–L
1
L–W
W–B
2
20A
AM2
3
5
1
10A
GAUGE
V
1
W–R
4
5
1
B–O
3
EFI
RELAY
1
2
B–O
2 1E
1 1D
B
2
1
2
7. 5A
IGN
4 2A 8 2A
13 2H
L–R
B–Y
2
40A AM1
120A
ALT
1
3
3
G–R
G–W
5 1H
B–W
4
W–L
1
1
3
G–W
G–W
B–O
15A
ETCS
1
W
1
20 IA3
I12
IGNITION SW
IG2 6 B–R
ST2
7 AM2
W–R
B–Y
2
1 1O
7. 5A OBD
W
1 2C
1
2
2 1D
5 1D
4
1K
3
B–R
B–R
B–R
B–R
R–W
G–Y
R–L
LG
W
G–R
B–O
B
E
B–W
B–R
B–Y
B–O
L–W
Q
P
O
N
M
L
K
J
I
H
G
F
D
C
B
A
(Cont. next page)
From Skid Control
ECU<16–9><17–6>
From Center
Airbag
Sensor Assembly
<18–3>
2
1
V
6 2E
L–R
IG1 4
2 AM1
W
ACC
2
E ngine C ontrol and E ngine Immobilis er S ystem
B–R
1
1
P ow er S ource
B
1
2 IS 300
M OVERALL ELECTRICAL WIRING DIAGRAM
W
B–R
G–Y
F12
FUEL PUMP RESISTOR
2 IS 300 (Cont’ d)
(Cont. next page)
E ngine C o ntrol and E ngine Immo biliser S y stem
5
A
B
L–W
B–R
B–O
B–Y
T2
THROTTLE CONTROL MOTOR
B–R
E
F
B
B–W
7
EA1
B–R
B–R
B–R
4
2
1
2
Y–B
R–Y
(*1)
9 E
CL–
R
10 E
CL+
W
Y
1
3
2
R–W
1
2
B–R
B–R
V3
VSV
(Canister Closed Valve)
1
2
I10
INJECTOR NO. 6
2
I9
INJECTOR NO. 5
1
B–R
B–R
1
R–W
L–R
B–W
Y–R
W–G
17 C
#20
I8
INJECTOR NO. 4
1
2
1
B–R
V
Y–G
15 E
#10
B–R
B–R
I7
INJECTOR NO. 3
L–W
11 E
PRG
1
14 E
#30
16 C
#40
13 E
#50
15 C
#60
22 C
CCV
L
B–O
21 C
ACIS
B–R
B–R
B–Y
7 A
+BM
2
R
B–O
13 A
MREL
B
4 A
BATT
2
I6
INJECTOR NO. 2
2
15 A 16 B 17 A
FPR TACH IGSW
G–R
2002 LEXUS IS 300 (EWD451U)
From Skid Control ECU
<16–9><17–6>
From Center Airbag
Sensor Assembly<18–3>
I5
INJECTOR NO. 1
1
1
B–R
V4
VSV(EVAP)
G–R
2
B–R
V2
VSV(ACIS)
H
B–O
B–R
B–R
B–R
G
A
B–R
C2
CAMSHAFT TIMING
OIL CONTROL VALVE
D
8
B–R
C
* 1 : Shielded
7
6
3 E
M+
2 E
M–
1 E
GE01
6 E 5 E
OCV+ OCV–
E 3 A , E 4 B , E 5 C , E 6 D , E 7 E ENGINE CONTROL MODULE
SIL
W
W–R
IMLD
+B
14 A 30 A
+B2
6 A
5 A
OX2A
28 C
HT2A
OX1A
30 C
P
HT
+B
2
E1
4
3
1
OX
HT
+B
2
E1
4
HT
+B
E1
2
4
BR
R–W
BR
BR
B–R
B–R
E
BR
B–R
1
OX
BR
B–R
B–R
2
IH4
3
B–R
BR
B–R
BR
B–R
B–R
A (S/D)
D (W/G)
1
OX
H9
HEATED OXYGEN SENSOR
(Bank 1 Sensor 1)
2
D
LG
+B
4
3
H11
HEATED OXYGEN SENSOR
(Bank 2 Sensor 1)
HT
W
(*1)
1
OX
H10
HEATED OXYGEN SENSOR
(Bank 1 Sensor 2)
3
W
(*1)
BR
H17
HEATED OXYGEN SENSOR
(Bank 2 Sensor 2)
R–W
W
20
IH1
B
10 IH1
(*1)
BR–Y
(A/T)
(*1)
B
C
G–B
9 IH1
E1
B
9 EA2
R–W
21 IH1
5 EA2
7 IG1
W
D A
B
(*1)
10 IG1
BR
J7
JUNCTION
CONNECTOR
B–R
9 D
G–B
W
R–W
W
8 IG1
R–W
B–R
HT1A
28 D
(*1)
F B
R–W
B–R
(*1)
F B
BR
J1 A , J2 B
JUNCTION CONNECTOR
A (S/D)
D (W/G)
A
D
HT1B
7 B
B–R
Q
BR–Y
(A/T)
B–R
G–Y
28 B
(*1)
BR–Y
(M/T)
17 BC2
J16
JUNCTION
CONNECTOR
P
B–R
2
B–R
O
12 IA1
V8
VSV (Pressure
Switching Valve)
B
B
OX1B
8 B
BR–Y
1 IC1
B
HT2B
17 B
P
J3
JUNCTION CONNECTOR
To Security Indicator Light
[Comb. Meter]<11–3>
N
OX2B
10 B
1
B–R
M
TBP
P
B–R
B–R
L–B
R–L
2 IA1
R–L
L
9 IA3
LG
K
LG
W
W
J
FC
G–Y
4 2E
From Body ECU
<10–9>
W
2 B
R–L
1 2A
LG
1 2J
11 2G
I
22 B
W
W
6 2D
26 A
WFSE
B–R
B–R
B–R
B–R
EA
F
G
Front side of
the intake
manifold
M
A
M1
MASS AIR FLOW METER
2002 LEXUS IS 300 (EWD451U)
R–W
R–W
A
EC
B–R
Left
fender
apron
BR
G
Center side of the
intake manifold
BR
BR
BR
BR
EB
W–B
J3
JUNCTION
CONNECTOR
Left fender apron
W–B
W–B
K3
KNOCK SENSOR 2
BR
W–B
From
Multi–Display
<25–3>
R–W
EC
1
E01
2 C
E02
1 C
EA
STP
STA
ACMG
11 A
KSW
4 B 12 A 16 A
Front side of the
intake manifold
W–B
Front side of the
intake manifold
D
D
MOPS
7 E
W–B
EA
A
B
J4
JUNCTION
CONNECTOR
D
EOM
1 A
From Stop Light
SW<6–4><26–4>
Cowl side
panel LH
A
10 EA1
2
EC
2 A
2 IA3
From Park/Neutral
Position SW(A/T)
or Clutch Start SW(M/T)<1–2>
ID
W–B
BR
1
1
W–B
A
2
17 IA1
F/PS
20 A
E11
ENGINE OIL PRESSURE SW
BR
W–B
BR
K2
KNOCK SENSOR 1
A
2
1
MOL
OIL LEVEL
5 1G
TRANSPONDER
KEY COIL
ANT2
C3
CRANKSHAFT
POSITION SENSOR
2 1A
ANT1
1
SPD
11 B 14 D
W–B
B–R
JUNCTION CONNECTOR
5
GND
1
ME01
3 C
To
Combination
Meter<22–2>
1
+B
2
CODE
E03
4 E
W–R
R–W
R–W
3
L
(*1)
L
C1
CAMSHAFT
POSITION SENSOR
(*1)
E1
7 D
From Center
Airbag Sensor
Assembly<18–2>
From Center
Airbag Sensor
Assembly
<18–3>
P–B
10 2B
V
3 2E
P–B
G–B
RXCK
L–Y
4
G2
29 E
W–L
(M/T)
TXCT
P2
POWER STEERING OIL
PRESSURE SENSOR
T9
TRANSPONDER KEY
AMPLIFIER
A (*1)
A (*1)
A (*1)
32 E
W–B
1 1J
V
18 IA1
G–B
19 IA1
A
(*1)
A (*1)
31 E
L
7 IA1
A
2 D
L
9 2B
A
1 D
* 1 : Shielded
W–B
G
L–B
G–W
F
G–B
B
9 2H
J1 A , J2 B
L–W
E
L–W
BR
R–W
R
4 1H
BR
D
E8
ENGINE COOLANT
TEMP. SENSOR
W–L
(M/T)
(*1)
V
(*1)
L–Y
(*1)
W–R
(*1)
G–Y
(*1)
T3
THROTTLE POSITION SENSOR
31 A
L–Y
24 B
P–L
23 B
L–Y
3 B
L–W
ENGINE CONTROL MODULE
V7
VAPOR PRESSURE SENSOR
NE–
L–B
NE
From FAN NO. 1, NO. 2
Relay and Diode(A/C)<23–4>
KNK2
GR–B
KNK1
B–R
E 3 A , E 4 B , E 65 C , E 6 D , E 7 E
B–Y
CODE
B–L
8 E 13 C 27 E 26 E 7 C 18 B 29 B 19 B 30 B 9 B 21 B 20 B
IGT
IGT2 IGT3
IGF TRC+ TRC– ENG+ ENG– NEO MPX1 MPX2
FAN
R–Y
RXCK
From Igniter
<1–3>
25 B
PTNK
W–G
35 B
VC
L–B
32 B
VPA2
L–Y
3 EA3
4 IC1
P
33 B
VPA
3
EA2
5 IC1
G
TXCT
BR
6 EA3
P–L
L–W
2 EA3
1
VPA2
From Skid Control
ECU<16–8><17–5>
L–Y
L–Y
2
VPA1
L–W
25 E 24 E
VTA VTA2
4
VC
2
PTNK
E2
1
To Skid Control
ECU<16–8><17–5>
23 C
PSP
3
VTA2
3
VCC
3
IC1
12
See Multiplex
Communication
System<10–3>
34 B 24 C
E2
THW
L–Y
2
VTA1
A9
ACCEL POSITION SENSOR
B–Y
C
BR
1
VC
BR
2
VC
3
3
E2
BR–Y
L–Y
C B
1
2
VOUT
4
E2
BR
10
EA3
L–W
TC
BR
A A
1
GND
BR
BR
11
B–Y
B
BR
A A
BR
BR
2
BR
10
To Unlock Warning
SW<10–16>
32 C 27 C 26 C
THA
VG
EVG
3
5
9
E ngine C o ntrol and E ngine Immo biliser S y stem
BR
4
1
B–R
2 IS 300 (Cont’ d)
M OVERALL ELECTRICAL WIRING DIAGRAM
From A/C COMP Relay
<24–2>
GR
E10
ENGINE OIL
LEVEL SENSOR
W–B
OIL TEMP.
B–W
W
J5
JUNCTION
CONNECTOR
3 IS 300
P ow er S o urc e
H eadlight
1
* 1 : Front Fog Light SW
3
2
4
B
ACC
2 AM1
IG1 4
L–R
L–R
R–W
4
1F
L–Y
3
1G
1
L–Y
1
1F
3
L–Y
W–R
B–R
PKB
Y
16
H
T
EL
LIGHT
CONTROL
SW
OFF
1 1A
TAIL
From Combination
Meter<22–5>
7
HF HU
5
W–B
To Parking Brake
SW<22–4>
8
CHG–
Y–R
R–L
17
4
HEAD
5 1G
DIMMER
SW
LOW
HIGH
W–B
FLASH
OFF
*1
ON
C11
COMBINATION SW
11
L–W
W–B
D4
DAYTIME RUNNING
LIGHT RESISTOR
W–B
Cowl side
panel RH
+B
HI
R–W
R–B
10
BR
IH
W–R
BFG LFG HL
2
W–B
7
IG
8
A
7 2F
R–Y
IND
BR
J7
JUNCTION
CONNECTOR
W–B
1
DRL
D6
DAYTIME RUNNING
LIGHT RELAY(Main)
3
A
R–Y
E
6
1
W–B
W–B
9
H
5 2B
1
R–Y
2
R–W
2
L–Y
R–L
R–B
5 A
D21
DIODE
(Fog Light)
1
2
R–L
3 2F 2 2F
R–L
R
R–W
1 A
4
5
H8
HEADLIGHT RH
(High)
R–W
R–L
4 B
3 2I
C9
HIGH BEAM INDICATOR
LIGHT[COMB. METER]
R–W
R–W
1
R
2 B
W–B
EC
2
2 A
W–B
Left fender apron
1 2M
3
A
W–B
H6
HEADLIGHT CONTROL ECU RH
1
W–B
H5
HEADLIGHT CONTROL ECU LH
B–L
BATTERY
2
3 B
H7
HEADLIGHT LH
(High)
R–B
R–L
1
1
R–L
1 B
4 2M
2
R–L
1
R–Y
R
1
R–Y
40A MAIN
120A ALT
20A ECU–B1
2
2
D2 A
2
D3 B
2
1
2
2
1
1
2
1
10A H–LP L UPR
1
1
10A H–LP R UPR
1
2
DAYTIME RUNNING LIGHT RELAY NO. 3
2
2
DAYTIME RUNNING LIGHT RELAY NO. 4
4
1
1
7. 5A DRL NO. 1
3
HEAD LP RELAY
30A DRL NO. 2
W
B
1
2
2
1
1
1
15A H–LP R LWR
R
R
1
1 1O
1
R
3
3 2M 9 2F
A
1
R–L
3
1
2
15A H–LP L LWR
1
R–L
40A AM1
2002 LEXUS IS 300 (EWD451U)
3
1
1 2F
J6
JUNCTION
CONNECTOR
B–R
2
To Rear
Fog Light
SW<7–4>
2 1D
4 1A
A
DIMMER RELAY
2
R–L
R–L
W
R–L
3
R
4
From Headlight Beam
Level Control ECU
<8–2>
R–L
R–L
To Theft
Deterrent
ECU<11–4>
R–B
3
R–L
D8
DIODE
(Headlight Cleaner)
6 2M
7. 5A ECU–B2
I12
IGNITION SW
1 1D
2
10A ECU–IG
To Headlight
Cleaner
Control Relay
<7–2>
R–L
From Headlight Cleaner
SW<7–2>
From FR FOG
Relay<7–3>
13
See Automatic Light
Control System<11–2>
A
J5
JUNCTION
CONNECTOR
Cowl side
panel LH
ID
A
W–B
Left
fender
apron
EC
M
W
1
120A
ALT
2002 LEXUS IS 300 (EWD451U)
B–L
1
2
2 2A
11 2H
F10
FRONT TURN
SIGNAL LIGHT RH
G–Y
Cowl side
panel RH
A
W–B
R7
REAR TURN SIGNAL LIGHT RH
[REAR COMB. LIGHT RH]
G–Y
G–B
F8
FRONT SIDE TURN
SIGNAL LIGHT RH
G–Y
G–B
F7
FRONT SIDE TURN
SIGNAL LIGHT LH
G–B
W–B
ID
A
W–B
F9
FRONT TURN
SIGNAL LIGHT LH
W–B
W–B
W–B
W–B
EC
BR
Cowl side
panel RH
A
A
7 2F
J7
JUNCTION
CONNECTOR
W–B
Left
fender
apron
W–B
Cowl side
panel LH
A
5 1G
BR
Left quarter
panel LH
G–B
J5
JUNCTION
CONNECTOR
W–B
BL
RH
C9
TURN SIGNAL
INDICATOR
LIGHT
[COMB. METER]
LH
3
2 1A
W–B
J15
JUNCTION
CONNECTOR
18
2
4 1E
G–Y
A
5
6
6 1E
5 2B
1 2I
IH
W–B
IH
5
6
8 1I
GND
1 B
HAZD
18 A
4
W–B
EC
1
2
6 2A
10 1I
E
ER
EL
7
6
5
2
TB
W–B
Left
fender
apron
8 1H
LR
2
8
HAZ
8 1A
3
TR
7 1A
1
TL
A12 A , A13 B
1
2
7 1K
3
LL
B
4
3 1L
RH
LH
C11
TURN SIGNAL SW
[COMB. SW]
HAZARD SW
[A/C CONTROL ASSEMBLY]
1
2
2 1K
FLSH RELAY
G–Y
BATTERY
1
1
W
W–B
2
15A
TURN–HAZ
2
1 1O
IG
G–W
10 1A
G–W
1
W
1
W
1 1K
3
P–G
1
40A
AM1
1 1D
L–R
10A
GAUGE
IG1 4
ACC
2
G–Y
2
I12
IGNITION SW
2 AM1
W
T urn S ignal and H az ard W arnin g Light
To Body ECU
<10–9>
2 1D
1
P ow er S ource
G–W
1
4 IS 300
M OVERALL ELECTRICAL WIRING DIAGRAM
BR
R5
REAR TURN SIGNAL LIGHT LH
[REAR COMB. LIGHT LH]
W–B
W–B
5 IS 300
G
G
7. 5A
PANEL
A
G
G
G
G
G
G
G
(A/T)
G3
GLOVE BOX LIGHT
A12
A/C CONTROL ASSEMBLY
BR
W–G
W–G
W–G
W–G
C8
CIGARETTE LIGHTER ILLUMINATION
A27
ASHTRAY ILLUMINATION
W–G
S4
SEAT HEATER SW(Front Passenger’ s Seat)
S3
SEAT HEATER SW(Driver’ s Seat)
W–G
(A/T)
T8
A/T SHIFT POSITION ILLUMINATION
[TRANSMISSION CONTROL SW(L–2)]
M4
MULTI–DISPLAY
R2
RADIO AND PLAYER
W–G
H16
HEADLIGHT CLEANER SW
W–G
W–G
W–G
C9
COMBINATION METER ILLUMINATION
[COMB. METER]
W–G
W–G
R15
REMOTE CONTROLLER(Navigation)
W–G
W–G
G
W–G
(A/T)
(A/T)
E12
ELECTRONICALLY CONTROLLED
TRANSMISSION PATTERN SELECT SW
G
G
G
G
T7 A
T14 B
TRAC OFF SW
G
TRAC OFF SW AND SNOW SW
G
R14
REAR FOG LIGHT SW
BR
See Taillight and
Stop Light System
<6–1><26–1>
BR
BR
7 2F
B–L
5 2B
BATTERY
W–B
IH
Cowl side
panel RH
J7
JUNCTION
CONNECTOR
1
A
A
A
A
1
1
2
4
4
6
A
2
2
1
1
1
3
A
A
A
A
A
14
2
5
12
10
A
A
A
A
A
A
2
22
A
J9
JUNCTION
CONNECTOR
120A
ALT
15
13
2
1
3
2
1
A
A
A
A
A
A
A
A
A
A
A
6
2
8
ILL–
E
R4
RHEOSTAT
W
1
T
2 1F
1 1O
G
1
TAIL RELAY
3
2002 LEXUS IS 300 (EWD451U)
2
2 A (A/T)
1 B (M/T)
2
2
3
3 A (A/T)
6 B (M/T)
5
G
G
G
G
4
3
2
1
J8
JUNCTION
CONNECTOR
5 1F
5 1E
Illumination
P ow er S ource
G
G
A
1
M
M OVERALL ELECTRICAL WIRING DIAGRAM
1
2
Left quarter
panel LH
W–B
2
W–B
1
A
BL
W–B
(*2)
N3
NOISE FILTER
(Stop Light)
G–Y
A
G–Y
(*1)
A
G–Y
1
HS–
5
4
G–Y
(*2)
J15
JUNCTION
A CONNECTOR
A
5
4
3 1I
J13
JUNCTION
CONNECTOR
G–Y
(*1)
7 1G
3 1F
7 1F
G–R
To Shift Lock
Control ECU
<21–4>
W–B
(*1)
H19
HIGH MOUNTED
STOP LIGHT
BACK–UP LIGHT SW
G–W
W–B
A
1
B9 B
R–B
11 1I
H19
HIGH MOUNTED
STOP LIGHT
To Engine Control
Module<2–12>
W–B
2
To Skid
Control ECU
<16–8><17–5>
R–L
6 1G
B B
R–B
BACK–UP LIGHT SW
[PARK/NEUTRAL
POSITION SW]
G–W
R–B
R5
BACK–UP LIGHT LH
[REAR COMB. LIGHT LH]
P1 A
* 1 : LED Type
* 2 : Bulb Type
8 1F
JUNCTION
CONNECTOR
J1 A , J2 B
R–B
R7
BACK–UP LIGHT RH
[REAR COMB. LIGHT RH]
R–B
B A
2 A (A/T)
1 B (M/T)
3 A (A/T)
2 B (M/T)
F A
R–L
4
D B
J1 A , J2 B
JUNCTION
CONNECTOR
B ac k– U p Light
To Navigation ECU<25–2>
1
A
SIDE
MARKER
BL
Left quarter panel LH
W–B
11
W–B
W–B
2
1
F6
FRONT SIDE MARKER
LIGHT RH
W–B
W–B
5 2B
W–B
3 2B
1
L1
LICENSE PLATE
LIGHT LH
G–B
W–B
1 BF1
1
2
L2
LICENSE PLATE
LIGHT RH
G–B
W–B
1 BE1
G–B
2
GND
2 BE1
B
B
10A
TAIL
W–B
G
6 2B
J14
JUNCTION
CONNECTOR
2 BF1
B
G–B
B
G–B
B
9 1I
G–B
3
2
W–B
W–B
IH
Cowl side
panel RH
2
W–B
1
G
1 2B
6 2H
1
BATTERY
1
2
W
1
2
W–B
To Theft Deterrent
ECU<11–4>
120A ALT
1
2 1F
R–W
2002 LEXUS IS 300 (EWD451U)
B–L
W–B
EC
F5
FRONT SIDE MARKER
LIGHT LH
G
1 1O
2
1
W–B
2
12 1K
G
5
TAIL
RELAY
G
Left fender
apron
L–R
13 1H
F4
FRONT PARKING LIGHT RH
G
F3
FRONT PARKING LIGHT LH
3
J15
JUNCTION
CONNECTOR
TAIL
40A AM1
1
W–B
3
R6
REAR
COMBINATION
LIGHT LH
G–B
G–W
G
STOP
G–W
T+
3
1
2
2 1D
W
A
A
4
2
A
W–B
A
A
9
T–
G
G
G
IG1 4
W 2 AM1
ACC
R8
REAR
COMBINATION
LIGHT RH
STOP
G–W
2
1
I12
IGNITION SW
A
5
1
A
W–B
4
G–R
6 1K
10A GAUGE
G
TAIL
L3
LIGHT FAILURE SENSOR
L–R
TAIL
J14
JUNCTION CONNECTOR
A
2 1E
R–L
1 1D 9 1K 6 1I
R–L
R5
REAR
COMBINATION
LIGHT LH
3
S8
STOP LIGHT SW
STOP
G–W
G–B
P ow er S ource
5
2
G–B
G–W
G–W
G–W
C 9 A , C10 B
15A STOP
6 IS 300
W–B
LH
G
4
IL
V–G
5 IB1
6 B
V–G
REAR LIGHTS
WARNING LIGHT
[COMB. METER]
G–R
2
Taillight and S top Light(S /D )
1
R–L
17 A
G–W
3
G–B
W–B
8
IG
RH
R–L
R7
REAR COMBINATION
LIGHT RH
3
B
B
B
B
TAIL
G
W–B
G–W
B
ST–
G–W
2
7
ST+
G–R
12 1I
3 1K
STOP
G–W
7 IS 300
R–Y
W–R
From Diode (Fog Light)
<3–4>
W
R–W
R–Y
H16
HEADLIGHT
CLEANER SW
L–R
H4
HEADLIGHT
CLEANER MOTOR
15A
WASHER
7. 5A ECU–B2
W–G
R
W–B
G–O
L
L–R
15A
FR FOG
W–R
W
W
B
HEAD LP
RELAY
G–O
(S/D)
W–B
G–O
W–B
R8
REAR FOG LIGHT RH
[REAR COMB. LIGHT RH]
W–B
(S/D)
F2
FRONT FOG LIGHT RH
W–B
W–B
(S/D)
R6
REAR FOG LIGHT LH
[REAR COMB. LIGHT LH]
L–W
R–Y
R–Y
J12(S/D)
J18(W/G)
JUNCTION
CONNECTOR
L–Y
W–B
R–L
120A ALT
20A ECU–B1
30A H–LP CLN
40A MAIN
F1
FRONT FOG LIGHT LH
To Combination SW
<3–4>
From Washer
Motor<9–3>
From HEAD LP Relay
<3–1>
B–L
5 2A
W–B
(S/D)
W–B
(W/G)
W–B
(W/G)
W–B
W–B
A
J5
JUNCTION
CONNECTOR
A
J15
JUNCTION
CONNECTOR
W–B
W–B
Left
fender
apron
EC
Cowl
side
panel LH
ID
Left
quarter
panel LH
BL
Right side
of the back
panel lower
BN
Cowl side
panel RH
IH
EC
Left fender
apron
3
1
1
A
5 1G
3
2
2
D
See Illumination
System<5–1>
R
15A
H–LP L LWR
W–G
W–R
See Headlight System
<3–1>
5 2B
9 1L
1
1
Left fender
apron
EC
D
2 2B
7 2B
8 2F
E
L
2002 LEXUS IS 300 (EWD451U)
BATTERY
G–O
(W/G)
G–O
1
1
2
2
1
FRWA
D
5
2
H3
HEADLIGHT CLEANER
CONTROL RELAY
6
BK1
G–O
(W/G)
E
7
R14
REAR FOG LIGHT SW
1
5
BJ2
3
1
G–O
(W/G)
HDLO
6
5
3
2
1
1
2
4 IB1
4
2
1
H
PB
IG
1
1
1
4
2
1
FR FOG
RELAY
4
2
3
1
1
1
1
6 IA1
11 1G
1 1O
6 2M
1
1
1
1 2C
9 2A
LH
B
M
40A
AM1
2
I12
IGNITION SW
2
To Diode
(Headlight Cleaner)
<3–3>
L–R
IG1 4
2 AM1
W
3
5
1 1D
2 1D
1 2F
1
ILL+
ACC
2
1
4
3
2
1
R ear F og Light
F ront F og Light
H eadlight C leaner
P ow er S ourc e
M
W
W
2002 LEXUS IS 300 (EWD451U)
BATTERY
R–W
1
R–L
Cowl side
panel RH
SHFL
SGF
10
BR
BR
B–L
W–R
From Skid Control ECU
<16–8><17–5>
R–L
To Combination SW
<3–4>
3
SHG
H12
HEIGHT CONTROL SENSOR
FRONT LH
1
B–O
SHFL
W–L
2
SGR
2
SHRL
3
SHG
H18
HEIGHT CONTROL SENSOR
REAR LH
SHB
1
1 BD1
2 BD1
3 BD1
20 IB1
9 IB1
11
SHRL
5
RH–
2
RH+
15
8 IB1
7
SBR
RHT
R
SHB
14 IA3
B–O
15 IA3
W–L
B–L
16 IA3
17
B–L
G–B
Y
W–B
C9
HEADLIGHT BEAM
LEVEL CONTROL
WARNING LIGHT
[COMB. METER]
IH
SBF
6
4
RHE
13
G–B
G–O
B
5 2B
8
SPDR
LH–
3
G–O
G–W
7 2F
J7
JUNCTION
CONNECTOR
B2
LH+
16
H15
HEADLIGHT BEAM LEVEL CONTROL ECU
LHE
12
G–W
A
A
B–R
9
B–R
1
120A
ALT
E1
B–R
LHT
14
L–Y
20
B–R
B–R
L
1
10 2I
7
2A
3
5 IG1
6
1 IG1
1
6 IG1
4
2 IG1
5
MRCOM
(B1)
RH1(S1) RH2(S2) RH3(S3) RH4(S4)
13 IG1
3
LH4(S4)
13 IA3
6
LH3(S3)
H2
HEADLIGHT BEAM LEVEL
CONTROL ACTUATOR RH
4 IA3
L–Y
Y
3 IA3
1
LH2(S2)
L
L–W
5 IA3
4
LH1(S1)
Y
B–R
2
B–R
10 2H
5
MLCOM
(B1)
L–W
R–B
IG
1
3 1H
H1
HEADLIGHT BEAM LEVEL
CONTROL ACTUATOR LH
B–R
R–Y
WNG
11 1A
10A
ECU–IG
R–B
R
18
10A
GAUGE
R–Y
11
17
2 1E
1 1D
3
R
R–G
1 1O
40A
AM1
L–R
2
H eadlight B eam L evel C ontrol
R–G
1
2
2 1D
IG1 4
ACC
I12
IGNITION SW
2 AM1
1
P ow er S ourc e
8 IS 300
4
M OVERALL ELECTRICAL WIRING DIAGRAM
9 IS 300
Power Source
Horn
Front Wiper and Washer
1
2
3
G
4
L–R
ACC
2 AM1
IG1 4
L–R
1 1D
25A
WIPER
G
W
15A
WASHER
4 1G
G
I12
IGNITION SW
6 1F
8 1G
G
L
L
17
L
C13
FRONT WIPER AND WASHER SW[COMB. SW]
+2
+1
+S
INT1
INT2
2
B1
MIST
EW
WF
1
2
5
L
40A AM1
+B
OFF
HORN
RELAY
OFF
MIST
1
INT
INT
1 1O
MIST
LO
M
F11
FRONT WIPER MOTOR
2
1
MIST
3
2
B
2
G–W
LO
2
2
W
G
L–Y
W1
WASHER MOTOR
2002 LEXUS IS 300 (EWD451U)
2
L
2 1D
G–B
HI
HI
OFF
1
L–Y
1
L–Y
MIST
5 2M
M
WASHER
WASHER
1
2
7
11
L–W
8
IA1
G–B
BATTERY
L–R
6
To Theft Deterrent
ECU< 11–4>
20
IA1
G–W
L–R
S
3
C12
HORN SW
[COMB. SW]
1
IA1
B–L
L–B
E
5
L–W
W–B
1
To A/C Control
Assembly
<24–6>
+2
4
W–B
5
1G
+1
1
L–R
9
1F
L–Y
L–B
W–B
L–W
L–B
L–R
1
2
16
11 2I
G–W
8
7 2G
To Headlight
Cleaner
Control
Relay<7–3>
120A ALT
10A HORN
2
9 IA1
WIPER RELAY
G–B
A
A
ID
Cowl side
panel LH
W–B
EC
1
1
W–B
J5
JUNCTION
CONNECTOR
Left fender
apron
H13
HORN
LH
H14
HORN
RH
M
1
W
L–B
G
2002 LEXUS IS 300 (EWD451U)
7 2H
5 2H
P/W RELAY
L–R
A12 A , A13 B
B–R
A/C CONTROL ASSEMBLY
20A D RR P/W
L–Y
6 2K
O
C9
COMBINATION METER
L–Y
L–R
20A D FR P/W
B–L
3 ID2
4 2L
Front floor
panel RH
2 BH1
W–B
(*1)
BK
3
2
1
6 II1
B–L
L–B
G
L
L–W
L–Y
L–R
R–Y
L–Y
B–L
R–L
L–B
G
20A P FR P/W
L
20A P RR P/W
L–W
10A MPX–B
R–Y
L–Y
L–Y
H
F
D
B
FE
FR
13 A 14 A
See Combination Meter System
<22–3>
4 IB3
4 2G
2
1
W–B
(*1)
5 2G
5
3
21
MPX–
MPX+
20
4 BH1
B8
BUCKLE SW RH AND
SEAT BELT WARNING
OCCUPANT DETECTION SENSOR
7 2K
2
1
MPX+
10 B
IG
16 A
P–S/B
5 A
8
MPX2
6 IH1
P–B
BATTERY
2
7. 5A
DOME
7. 5A PANEL
1
W
1
R–L
4 2H 1 2C
W
20A
ECU–B1
20A DOOR
MPX–
7
MPX1
P–G(*2)
120A
ALT
40A AM1
6 2M
E4
ENGINE CONTROL MODULE
1 A
P–G
2
TAIL RELAY
L
5 2I
T6
THEFT DETERRENT ECU
1
B–R
10 2H
1 IA3
21
MPX1
MPX2
20
L
1
3 1H
PCLP
12 B
* 1 : w/ Power Seat
* 2 : w/o Power Seat
R–W
1
R
L–R
11 1H 4 1B
MPX2
5 B
P–G
(*1)
B
I12
IGNITION SW
IG1 4
ACC 3
1 1D
1 1G
7
MPX1
L
2 1F
2 AM1
6 1D
10A
GAUGE
IG
3
4
From Center Airbag
Sensor Assembly
<18–3><18–4>
See Taillight and
Stop Light System
<6–1><26–1>
1
5
3
G
5 1F
10A
RADIO
NO. 2
B5 A , B6 B
BODY ECU
10A ECU–IG
2
1
W
4
ACC
3
O
2
2 1D
W
TAIL
2 B
2
M ultiplex C ommunication S ystem
O
P–G
(*1)
11 1B 1 1O
1
BSUB
1
P ow er S ource
I
G
E
C
A
(Cont. next page)
R
7 1I
From RR DEF Relay
or DEICER Relay
<21–2>
5
DFG
10 IS 300
M OVERALL ELECTRICAL WIRING DIAGRAM
D11
DOOR COURTESY
LIGHT FRONT RH
L–Y
W–B(*2)
10 IS 300 (Cont’ d)
(Cont. next page)
*
*
*
*
M ultiplex C ommunic ation S ys tem
5
7
6
1 : w/ Power Seat
2 : w/o Power Seat
3 : w/ Moon Roof
4 : w/o Moon Roof
8
B5 A , B6 B
BODY ECU
DBKL
3 A
DCLP
11 B
ILE
PD
18 B
8
G–B
R
G
R–Y
12 BA1
PCT
6
1
SU
SD
E
PCT
P7
POWER WINDOW
CONTROL SW
REAR LH
R
E
P8
POWER WINDOW
CONTROL SW
REAR RH
G–B
SD
R–W
G
1
SU
D
U
6
SU
3
6 BA1
U
2
5
R
7 BB1
D
E
3
G
R
G
6 BB1
4
W–B
5
L–Y
2
W–B
4
L–W
21 IB1
W–B
3
R
7 BA1
1
W–B
(S/D)
2
1
M
2
W–B(W/G)
M
W–B
(S/D)
1
P11
POWER WINDOW
MOTOR FRONT RH
W–B
(W/G)
W4
WIRE TO
FFC HOLDER
L–Y
L–W
W–B
6
U
5
G
L
W–B
D
2
ON
OFF
1
IJ1
12 BB1
Y–B
L–W
4
W
W–B
(W/G *2)
BJ
W–B
P6
POWER WINDOW
CONTROL SW
FRONT RH
PCT
H
W–B
B–L
L–B
G
L
L–W
L–Y
L–R
R–Y
L–Y
Y–B
W
1
2
H
W
(*4)
11 BB1
L–Y
2
11 BA1
5 IH1
2
W
W
V6
VANITY LIGHT RH
4
3 II1
SD
DOOR
I13
INTERIOR LIGHT
A
W
I
A
W
V5
VANITY LIGHT LH
H
A
1
W–B
(*3)
F
1
H
W–B(*1)
E
G
2 II1
L–Y
L–Y
(*3)
W
(*4)
M3
PERSONAL LIGHT
[MOON ROOF CONTROL SW]
W–B
(S/D *2)
W–B
(W/G *2)
W–B
(*1)
P5
PERSONAL LIGHT
1
H
D
W4
WIRE TO
FFC HOLDER
A
1
L–Y
L–Y
B7
BUCKLE SW LH
A
4 IH1
F
5 1N 5 1L
W
(*4)
2
2
RLU
9 A
1 1L
2 1N
2 BG1
C
L–W
2
F
R–W
W4
WIRE TO
FFC HOLDER
1
L–Y
P–B(*1)
2002 LEXUS IS 300 (EWD451U)
6 1H
1
RLD
10 A
R–Y
7 1N
R–W
L–Y
P–B(*2)
P–B(*1)
2
I11
IGNITION KEY
CYLINDER LIGHT
1
R–G
C
RRU
3 B
G–Y
R–G
P–B
1 1B
B
RRD
4 B
2 ID2
D10
DOOR COURTESY
LIGHT FRONT
LH
C
8 1L
From Center Airbag
Sensor Assembly
<18–3>
P–B
J13
JUNCTION CONNECTOR
C
4 BG1
A
PU
17 B
2
M
1
P12
POWER WINDOW
MOTOR REAR LH
P13
POWER WINDOW
MOTOR REAR RH
L–Y
W–B(W/G)
B–L
L–B
G
L–Y
R–Y
L–R
W–B(W/G)
W–B(S/D)
W–B
W–B(S/D)
B–L
L–B
G
L
L–W
L–Y
L–R
R–Y
W–B
(S/D *2)
W–B
(S/D *2)
A
B
C
D
E
F
G
H
I
J
K
Front floor
panel LH
M
(Cont. next page)
M ultiplex C ommun ication S y stem
9
11
10
12
B 5 A , B 6 B BODY ECU
HAZ OBD2
10 B 1 B
GND
BECU
2
BCTY
12
MPX3
6
8 1B
10 1B
ACTD
20 B
ACT+
ACT–
9
10
LSWP LSR
14 B 4 A
BZR2
15 B
BZR
16 B
L–R
11
7 1B
7 1L
2 1B
5 1B
6 1N
LSWD
10
14 BC2
D18
2
DOOR LOCK MOTOR
AND DOOR LOCK
DETECTION SW
REAR LH
9 BA1
ID
W–B
Cowl side
panel LH
EC
Left fender
apron
Front floor
panel RH
BK
B
W–B
(S/D)
B
B
J16
JUNCTION
CONNECTOR
A
W–B
(W/G)
Left quarter
panel LH
W–B
A
W–B
W–B(W/G)
W–B
L–Y
G
W–B
W–B(S/D)
W–B
W–B(S/D)
W–B(W/G)
W–B
(W/G)
A
L–O
M
1
W–B
W–B
L–Y
G
W–B(W/G)
W–B(S/D)
W–B
W–B(S/D)
BUZZER
4
W–B
D17
3
DOOR LOCK MOTOR
AND DOOR LOCK
DETECTION SW
FRONT RH
2
L–R
3
W–B
W–B
(W/G)
4
1
LOCK
DETECTION
M
D19
3
DOOR LOCK MOTOR
AND DOOR LOCK
DETECTION SW
REAR RH
9 BB1
D20
DOOR LOCK MOTOR,
DOOR KEY LOCK AND
UNLOCK SW AND
DOOR LOCK DETECTION SW
FRONT LH
2
LOCK
DETECTION
M
M
1
8 BA1
L–O
4
L
2
W–B(W/G)
W–B(W/G)
B–L
L–B
G
L–Y
R–Y
L–R
W–B(W/G)
W–B(S/D)
W–B
W–B(S/D)
J5
JUNCTION
CONNECTOR
1
W–B
(S/D)
J
K
6
W–B
I
5
LOCK
DETECTION
H
W–B
F
G
UNLOCK
E
J11
JUNCTION
CONNECTOR
D
D
2
1
LOCK
DETECTION
D
LOCK
PULSE
SENSOR
LIMIT SW
W–B
W–B
W–B
C
3
M
P10
POWER WINDOW MOTOR FRONT LH
B
4
L–R
5
R–W
3
L–R
4
L–R
1
5 1G 2 1A
A
R–W
G–Y
2
4 BA1
G–Y
L–R
8 BB1
3 BA1
R–W
R–W
4 BB1
G–Y
G–Y
R–W
G–Y
L–B
G–B
G–R
BR–W
W
W–G
R
G
L–R
L–B
B–L
3 BB1
W–B
10 1L
L–Y
KUL
15
L–Y
KL
6
5 II1
2 2K
5 IA1
K1
KEYLESS BUZZER
SGND
11
1 2K
13 IA1
L–O
PLS
12
1 2L
L–O
4 ID2
C
J16
JUNCTION CONNECTOR
L–R
C
TX
L–R
LMT
13
C
1 2H
L–R
U
8
L–R
D
20
13 BC2
R–W
2
5 1I
G–Y
1
1 1I
R–W
G–Y
To Data Link Connector 3
<2–5>
2002 LEXUS IS 300 (EWD451U)
From FLSH Relay
<4–3>
PW PWR PWL
9 1H
18
DCTY
2 2L
4
10 1H
Y–R
16
E
BDM
9 1B
2 2H
P9
POWER WINDOW MASTER SW
9
5
R–G
R–G
W–B
R–Y
W–B
W–B
R–Y
W
G–W
To Moon Roof
Control ECU
<12–2>
R–W
7 1H
A
J15
JUNCTION
CONNECTOR
A
BL
A
B
C
D
E
F
G
H
I
M OVERALL ELECTRICAL WIRING DIAGRAM
10 IS 300 (Cont’ d)
10 IS 300 (Cont’ d)
M ultiplex C ommun ication S y stem
R–G
R–L
R–B
W–B
G–B
B–Y
From Theft Deterrent ECU
<11–3>
R–B
B–Y
From Engine Control
Module<2–12>
B–Y
W–B
W–B
J7
JUNCTION
CONNECTOR
BR
BR
U1
UNLOCK WARNING SW
BR
D16
DOOR LOCK
CONTROL SW RH
UNLOCK
LOCK
R–L
R–L
D14
DOOR COURTESY SW
REAR LH
R–L
D15
DOOR COURTESY SW
REAR RH
D12
DOOR COURTESY SW
FRONT LH
R–G
W–B
W–B
L–Y
D13
DOOR COURTESY SW
FRONT RH
J12(S/D)
J17(W/G)
JUNCTION
CONNECTOR
W–B
(W/G)
B13
BACK DOOR OPENER SW
W–B
1
1
1
1
1
B–Y
G–B
G–R
B
(W/G)
L7
LUGGAGE COMPARTMENT
LIGHT
L–Y
W–B
(W/G)
W–B
W–B
(W/G)
Cowl side
panel RH
IH
BN
Right side of the
back panel lower
G–R
R
W–B
(W/G)
A
B
(W/G)
D9
DIODE (Luggage
Compartment Light)
B11 B
W–B
G
W–B
(W/G)
L4 A
(S/D)
LUGGAGE COMPARTMENT
DOOR COURTESY SW AND OPENER MOTOR
BACK DOOR COURTESY SW
AND OPENER MOTOR
L6 A
B12 B
LUGGAGE COMPARTMENT
DOOR OPENER RELAY
BACK DOOR OPENER RELAY
L–Y(S/D)
L–Y(W/G)
A
B–R
(W/G)
R–Y
R–Y
GR–L
(W/G)
5 B
B–R
(W/G)
R–Y
L–W
GR–L
(W/G)
GR–L
(S/D)
H
W–B(S/D)
I
2
W–B(W/G)
F
(S/D)
2 A (S/D)
2 B
W–B
(W/G)
G
R–B
(W/G)
D
15 BC2
5 2B
5 2K
4 2K
C (S/D)
D (W/G)
C
D
1 B (W/G)
1
3 B
4 B (W/G)
3 A
5
1
W–B
(W/G)
E
R–B
(W/G)
C
+B
A
L–Y
(S/D)
A
7 BK1
E
L–Y
(W/G)
L–Y
(W/G)
2
RDA
W3
WIRELESS DOOR LOCK
CONTROL RECEIVER
B
W–B
W–B(W/G)
W–B
L–Y
G
W–B
W–B(S/D)
W–B
W–B(S/D)
A
1 B
2
3
2
BC2
1 A
7 2F
J12(S/D)
J17(W/G)
JUNCTION
CONNECTOR
PRG
1
1
A
2 A (S/D)
2 B (W/G)
4 B
4 A (S/D)
3 B (W/G)
1 A
19 II1
6 BJ2
2002 LEXUS IS 300 (EWD451U)
2
B
B
C (S/D)
D (W/G)
M
2
3
G–Y
B
R–B
(S/D)
2 IB1
B
5
11 BC2
B
6
B
B
3 BC2
8 IH1
J6
JUNCTION
CONNECTOR
18 II1
17 II1
J12(S/D)
J17(W/G)
JUNCTION
CONNECTOR
DCTY
6 A
RCTY
5 A
PCTY
8 B
GND2
19 B
KSW
6 B
PMUL
9 B
PML
7 B
BDSU
13 B
LGCY
7 A
TR+
8 A
RDA
2 A
PRG
1 A
16
15
14
13
BODY ECU
B5 A , B6 B
M
B
2002 LEXUS IS 300 (EWD451U)
C11
COMBINATION SW
AUTO
R–Y
H
A
16
EL
W–B
A
C 9 A , C10 B
B–L
5 2B
1
T1
THEFT DETERRENT HORN
LIGHT CONTROL SW
W–B
W–B
Left
fender
apron
EC
W–B
IH
J7
JUNCTION
CONNECTOR
2
1
BL
A
1
2
11 IB1
12 IA3
W–B
Cowl side
panel RH
J5
JUNCTION
CONNECTOR
SECURITY INDICATOR
LIGHT[COMB. METER]
ID
A
BR
7 2F
A
A
18 A
5 A
LUG
2 A
TAIL
4 B
HORN
Left quarter
panel LH
J15
JUNCTION
CONNECTOR
L5
LUGGAGE
COMPARTMENT DOOR
KEY UNLOCK SW
Cowl side
panel LH
W–B
5 1G
8 B
BR
EC
W–B
1 1A
2 1A
11 IA1
1 A
HEAD
DSWH
4 A
E9
ENGINE HOOD
COURTESY SW
Left fender
apron
12
G–Y
HEAD
13
W–B
TAIL
R
T
10 2A
2 2E
L–B
A28
AUTOMATIC LIGHT
CONTROL SENSOR
OFF
14
L–B
CLTE
3
R
4
Y
CLTS
3 2A
SH–
2 B
6 A
NAV1
L
BATTERY
R
BR
1
W–B
B–W
1
40A AM1
120A
ALT
Y
3 IG3
IND
12 B
G–Y
CLTB
E
22 A
8 B
MPX2
L
1
W
2
BR
3 IE1
A
L–B
4 IE1
H
L–B
5 IE1
T
13 A 12 A 14 A
7 B
MPX1
B–W
2
20A
ECU–B1
15A DOOR DL
W
1
CLTE
21 A
W–R
19 A
KSW
B–Y
CLTS
G
3 B
SH
To Unlock Warning
SW<10–16>
11 A
+B1
See Multiplex
Communication
System<10–4>
20 A
4 2F
G–W
CLTB
10 A
IG
7. 5A
ECU–B2
From Multi–Display
<25–3>
9 A
J6
JUNCTION
CONNECTOR
A B–R
B–R A
10A
ECU–IG
6 2M
R–Y
THEFT DETERRENT ECU
4 1A
1 1D
From Diode (Fog Light)
<3–4>
1
L–R
4
R–W
1 1O
IG1 4
ACC
T5 A , T6 B
I12
IGNITION SW
2 AM1
B
G
3
T heft D eterrent
From TAIL Relay
<26–1>
1 2C
1
2
2 1D
W
L–R
2
A utomatic Light C ontrol and
Light A uto T urn O ff
G–W
1
G
4 2I
1
P ow er S ource
From HORN Relay
<9–4>
1
11 IS 300
M OVERALL ELECTRICAL WIRING DIAGRAM
G–Y
From Engine Control Module
<2–6>
12 IS 300
P ow er S ourc e
A utomatic G lare–R es istant
E C M irror
M oon R oof
1
2 AM1
W
R emote C ontrol M irror
3
2
ACC 3
R
IG1 4
L–R
4
R
6 1D
B–R
1 1D
I12
IGNITION SW
10A
RADIO
NO. 2
B
10A
ECU–IG
W4
WIRE TO
FFC HOLDER
B
3 1N
8 1N
2 1D
B–R
2
E 4
E
R–G
4
OPEN
E1
2
C
G
W4
WIRE TO
FFC HOLDER
LEFT
6 1A
LEFT
VR VL
6
C
EC–
EC+
EC–
5 1G
8
MHR
M
BJ
R12
REMOTE CONTROL
MIRROR RH
6
M+
8
MVL
M
MHL
M
P–B 7 M+
R12
REMOTE CONTROL
MIRROR RH
R11
REMOTE CONTROL
MIRROR LH
7
W–B
EC+
13 II1
P–L
5
10 1L
P–G
4
10 ID2
L
P–B
G–R
W–R
G–R
W–R
W–B
5
MVR
M
12 II1
4
7 1L
P–B
8 ID2
6
BATTERY
9
L
C
M3
MOON ROOF CONTROL SW
1 IJ1
7 1B
P–B
L–Y
20 II1
SELECT
SW
W–B
9 ID2
C
L–Y
8 II1
2
P–B
G–R
B–L
17 ID2
LEFT
HR HL
10
4 II1
12 ID2
RIGHT
L–Y
J11
JUNCTION
CONNECTOR
G–R
W–R
OPEN
Front floor
panel LH
RIGHT
P–L
3 1A
W–R
CLOSE
DOWN
L
1 1N
G–R
DOWN
M+
P–B
4 1N
4
W–R
UP
UP
RIGHT
3
1
1
DOWN/
RIGHT
P–G
W–B
3
H
W–B
6
W–B
W–B
W–B
2
G
W–B
120A
ALT
5
C
8
L–W
L–R
R–W
R
2
H
GND
7
1
D
OPERATION
SW
UP/
LEFT
G–R
1
W–B
W–B
DCTY
CLOSE
3
W
W
6
EC–
2
W–R
DOWN
J11
JUNCTION
CONNECTOR
D
W
10
IG
1 1O
UP
EC+
W
M2
MOON ROOF
CONTROL ECU
3
5
R13
REMOTE CONTROL MIRROR SW
B
B–R
B–R
W
30A S/ROOF
40A AM1
2002 LEXUS IS 300 (EWD451U)
4
+B
1
1
IG
GR
W
W
W
1
From Body
ECU<10–10>
12 1B
I14
INNER MIRROR
R11
REMOTE CONTROL
MIRROR LH
A
W–B
EC
Left
fender
apron
J5
JUNCTION
CONNECTOR
A
ID
Cowl
side
panel LH
M
W
W
9 2I
30A P/SEAT
W
W
1
40A AM1
1
4
M
1
FRONT
VERTICAL
2002 LEXUS IS 300 (EWD451U)
M
1
4
W–B
UP
REAR
FRONT
SLIDE
SLIDE
P16
POWER SEAT CONTROL SW (Driver’ s Seat)
120A ALT
B–L
W–B
B
2
9
6
5
10
2
L–R
2
M
1
Y–G
1
M
2
B
1
M
2
W
2
BG1
2
BH1
W–B
(*1)
W–B
(*1)
W–B
(*1)
R–G
(*1)
Front floor
panel LH
3 BG1
R–G
(*1)
10 IB3
6
R
1
2
W–B
(*2)
BJ
W–B
(*1)
S9
SEAT HEATER
(Driver’ s Seat)
W–B
(*1)
W–B
(*1)
P25
POWER SEAT MOTOR
(Front Passenger’ s Seat
Slide Control)
B–R
B
W–R
P22
POWER SEAT MOTOR
(Front Passenger’ s Seat
Front Vertical Control)
W–R
W–G
P23
POWER SEAT MOTOR
(Front Passenger’ s Seat
Rear Vertical Control)
Y–G
Y–R
3
IG
R–G
(*2)
P21
POWER SEAT MOTOR
(Driver’ s Seat
Slide Control)
B–R
DOWN
8
M
5 2B
7 2F
A
A
2
E
W–B
IH
BR
Cowl
side
panel
RH
A
Front
floor
panel
RH
3 BH1
2
E
BK
R–L
(*1)
R–L
(*1)
R
IG
4 IH4
6
3
1
2
R–L
(*2)
9
6
B
W–R
UP
7
1
P24
POWER SEAT MOTOR
(Front Passenger’ s Seat
Reclining Control)
L–R
L
6 1L
S4
SEAT HEATER SW
(Front Passenger’ s Seat)
FRONT
2
P18
POWER SEAT MOTOR
(Driver’ s Seat Front
Vertical Control)
10 W–R
W–G
DOWN
FRONT
FRONT
VERTICAL
UP
Y–G
3
2
BR
REAR
M
2
REAR
15A
SEAT HTR
J7
JUNCTION
CONNECTOR
BATTERY
REAR
VERTICAL
5
1
P19
POWER SEAT MOTOR
(Driver’ s Seat Rear
Vertical Control)
Y–G
Y–R
L–R
S3
SEAT HEATER SW
(Driver’ s Seat)
DOWN
2
2 1L
1 1D
BR
2
2
M
L–R
4
* 1 : w/ Power Seat
* 2 : w/o Power Seat
BR
1
7
1
P20
POWER SEAT MOTOR
(Driver’ s Seat
Reclining Control)
L–R
L
REAR
VERTICAL
UP
8
3
2
1
1 BH1
3
R–G
1
DOWN
FRONT
RECLINING
R–L
1
REAR
12 IH4
RECLINING
1 1O
L–R
W
B–W
7 2M
1
IG1 4
ACC
2
S eat H eate r
B–W
1
2
2 1D
W
10 2G
W
7 IB3
1
BG1
I12
IGNITION SW
2 AM1
1
P ow er S eat
W
W
W
P ow er S ourc e
13 IS 300
M OVERALL ELECTRICAL WIRING DIAGRAM
S10
SEAT HEATER
(Front Passenger’ s Seat)
W–B
(*2)
W
P17
POWER SEAT CONTROL SW (Front Passenger’ s Seat)
MEMO
2002 LEXUS IS 300 (EWD451U)
W
1
2002 LEXUS IS 300 (EWD451U)
BATTERY
W–R
2
25A
EFI
B
6
19 D
S1
SLT+
SLT–
8
34 D
SLN+
3
13 D
SLN–
9
12 D
OIL
1
27 D
34 B
E2
VPA
7
A A
C B
VC
3 C
ME01
VTA2
4 E
E03
BR
BR
BR
LG
V
Y
B
W
B–R
W–B
B–L
EB
D
1 A
EOM
STA
Left
fender
apron
A
D
2 A
EC
STP
4 B
W–B
EC
J3
D
JUNCTION
CONNECTOR
TC
3 B 12 A
BR
Center side of the
intake manifold
JUNCTION
CONNECTOR
BR
E1
ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID
VTA
J1 A , J2 B
VPA2
E2
Y
OT
G–Y
SLN–
W–L
SLN+
B–R
SLT–
G–W
SLT+
LG–B
G
SLU–
2
35 D
B–Y
GR
SLU+
10
10 D
SLU–
ENGINE CONTROL MODULE
R–B
R
S4
4
11 D
SLU+
THW
22 D 32 C 27 C 26 C 24 C 33 B 32 B 25 E 24 E 35 B
Y–R
L
S3
11
16 D
S4
23 D
SP2+
SP2– THA
VG
EVG
E3 A , E4 B , E5 C , E6 D , E7 E
R–W
O
S2
5
17 D
S3
NCO–
20 D
GR
O
S1
12
18 D
S2
NCO+
21 D
See Engine Control and
Engine Immobiliser System
<2–9><2–10><2–11><2–12>
BR
J3
JUNCTION
CONNECTOR
B
5 A
+B2
IGSW
17 A
1
2
L–R
W–B
Cowl side panel RH
B–R
B
6 A
+B
+BM
7 A
2
1
4
(Cont. next page)
W–B
IH
11 2B
4 2B
W–B
2
15A
ETCS
1
B–R
2
20A
AM2
1
L–W
BR
1
120A
ALT
1
B–Y
2
B–Y
2
B–O
MREL
L–W
13 A
B–O
BATT
7. 5A
IGN
R
4 A
8 2A
13 2H
G
1
3
5
2
B–R
O1
O/D DIRECT CLUTCH
SPEED SENSOR
G
2
1
2
B–Y
5
1H
V1
VEHICLE SPEED SENSOR
(Electronically Controlled
Transmission)
1
EFI
RELAY
B–Y
B–O
5
1D
3
L–Y
1
20 IA3
I12
IGNITION SW
B–R
IG2 6
7 AM2
W–R
ST2
L–R
IG1 4
ACC
2 AM1
W
2
E lec tronic ally C ontrolled T ransmis sion and A /T Indic ator
R–L
1
40A
AM1
1
P o w er S ou rc e
R–L
2
1 1O
1
2
2 1D
14 IS 300
M OVERALL ELECTRICAL WIRING DIAGRAM
B–R
14 IS 300 (Cont’ d)
E lectronically C ontrolled T ransmiss ion and A /T Indicator
5
7
6
8
L–R
A
L–R
R–L
R–L
1 1D
3
F A
RB
J1 A , J2 B
P1
A/T INDICATOR LIGHT SW
[PARK/NEUTRAL POSITION SW]
PL
RL
5
2L
7
LL
4
8
J1 A , J2 B
10A
GAUGE
D B
R–L
2
DL
Y–G
1
NL
JUNCTION
CONNECTOR
G–W
GR
G–R
R–B
G
E
E JUNCTION CONNECTOR
B
A
9 1K
2 1E
E
B
B A
GR–B
9
IG3
GR–B
A
B
LG–B
10
IG3
LG–B
A12
A/C CONTROL ASSEMBLY
12 B
14 B
3
2
4
MPX–
BR
L
A
E12
ELECTRONICALLY
CONTROLLED TRANSMISSION
PATTERN SELECT SW
SNOW
PWR
M
R
C9
COMBINATION METER
LCD
19
J7
JUNCTION
CONNECTOR
A
BR
7 2F
5
BR–W
W–B
BR
J4
A
JUNCTION
CONNECTOR
5
5 IG3
Y–G
BR
A
B–Y
L–W
2
L
D A
A
C12
A/T SHIFT MAIN SW
[COMB. SW]
MPX1
21 B
13
4
See Multiplex
Communication System
<10–3>
G–Y
ECC
G–Y
SFTU
F B
T8
TRANSMISSION CONTROL SW
(L–2)
W–B
SFTD
MPX2
20 B
4
4 IG3
BR–Y
4
L
15 B
1 IA3
12 IA1
J1 A , J2 B
2
JUNCTION
CONNECTOR
BR–Y
GR–G
GR–R
1
E02
1 C
W–B
B
W–B
17 IA1
BR
B
E01
2 C
SNOW
L
7 D
BR–Y
J7
JUNCTION
CONNECTOR
GR–G
16 IA1
E1
SFTU
6 B
Y–G
SFTD
1
PWR
ECT PWR
4 D
SNOW
13 B
R
N
D
E3 A , E4 B , E5 C , E6 D , E7 E
ENGINE CONTROL MODULE
5 B
To Shift Lock
Control ECU
<21–4>
17
Y–G
3 D
G–W
J1 A , J2 B
JUNCTION
CONNECTOR
GR–B
G–R
R–B
5 D
P
A
B
R–L
C
A
R–L
J1 A
6 D
GR–R
2002 LEXUS IS 300 (EWD451U)
JUNCTION
CONNECTOR
B A
5 2B
4
Y–G
W–B
Front side of the
intake manifold
EA
Cowl side panel RH
IH
IE
Front floor panel
center LH
M
W
W
W–R
1
B
2002 LEXUS IS 300 (EWD451U)
B–R
J1 A , J2 B
BR
W–B
W–B
W–B
W–B
See Multiplex
Communication
System<10–3>
BR
BR
BR
BR
W–B
W–B
W–B
W–B
B–L
Front side of the
intake manifold
BR
EA
JUNCTION
CONNECTOR
J4
JUNCTION
CONNECTOR
D A
F B
ECC
4
BR–Y
(A/T)
A BR
12 IA1
31 B
CANCEL
SET/COAST
5
6 IA3
CCS
M–
2 E
CCS
GE01
1 E
RES/ACC
CRUISE
J7
JUNCTION
CONNECTOR
BR–Y B
(A/T)
B
CL–
9 E
BR–Y
(M/T)
A
A
7 D
CL+
L–R
Center side of the
intake manifold
VTA2
M+
4
13 B 14 B
D
CLSW
3 E 13 B
Front floor
panel center
LH
C9
CRUISE CONTROL
INDICATOR LIGHT
[COMB. METER]
EB
VTA
IE
19
17
2 1E
BR–W
EC
1 C
2 C
ME01 MPX1 MPX2
3 C 21 B 20 B
BR–Y
D
D
VC
BR–Y
(M/T)
Left
fender
apron
D
E03
4 E
VPA2
4 1A
1 1D
BR–W
IH
B
EC
2 A
VPA
(A/T)
J3
JUNCTION
CONNECTOR
B
EOM
1 A
E2
E3 A , E4 B , E5 C , E6 D , E7 E
STP
4 B 34 B 33 B 32 B 35 B 25 E 24 E 10 E
2
1
(A/T)
Cowl side panel RH
B–R
+B2
5 A
TC
3 B
ENGINE CONTROL MODULE
E01
E02
E1
ST1–
8 A
C15
CRUISE CONTROL
CLUTCH SW
L–R
11 2B
+B
6 A
IGSW
17 A
4
3
See Engine Control and
Engine Immobiliser System
<2–8><2–9><2–10><2–11><2–12>
A
R–L
BATTERY
L–W
4 2B
W–B
2
25A
EFI
B–R
2
15A
ETCS
1
+BM
7 A
B–O
S8
STOP LIGHT SW
2
20A
AM2
1
BATT MREL
8 2A
8
2B
7. 5A
IGN
A
15 IA1
J6
JUNCTION
CONNECTOR
4
B–R
(M/T)
1
120A
ALT
1
B–Y
1
B–Y
4 A 13 A
B–O
2
EFI
RELAY
L–W
2
3
5
2
13 2H
B–O
1
2
1
2
B–Y
B–O
B–R
B–L
1
B–Y
5
1H
Y–R
(M/T)
1
20 IA3
ST2
B–R
5
1D
3
10A ECU–IG
2
1 1O
W–R
IG2 6
L–R
2
B–R
(M/T)
1
2
7 AM2
IG1 4
I12
IGNITION SW
2 AM1
W
ACC
C ruise C ontrol
B–R
(M/T)
2 1D
1
P ow er S ource
L–R
40A
AM1
15 IS 300
M OVERALL ELECTRICAL WIRING DIAGRAM
10A GAUGE
See Electronically Controlled
Transmission and
A/T Indicator System
<14–6>
C12
CRUISE CONTROL SW
[COMB. SW]
J3
JUNCTION CONNECTOR
B–R
MEMO
2002 LEXUS IS 300 (EWD451U)
W–R
20A
ECU–B1
L
60A
ABS1
L
2002 LEXUS IS 300 (EWD451U)
1
3
1
2
2
4
6
2
2
L–B
2
1
2
2
3
4
2
2
L–Y
L–B
1 A
R+
MRF
1
MR
+BI
MT
W–L
MR
E2
B
15
VCM
PMC
5
E2
BR–W
B–L
Cowl side panel RH
E3
FSS
B–R
6
16
VCM2 PMC2 E3
7
21 D 18 D 12 D 13 D
VCM2 PMC2
R–L
B–R
L–W
(*1)
W–B
ABS MTR RELAY
ABS SOL RELAY
L–W
R–L
B–R
B–R
IH
14
R
A32
ABS & BA & TRAC & VSC ACTUATOR
(*1)
PMC
(*1)
2
L–Y
MT
14 IA1
VCM
20 D 10 D 19 D
W
GND
3
GSS
12 C
S15 A , S16 B , S17 C , S18 D
SKID CONTROL ECU
G
M
4
23 A 14 D
+BM
SR
24 A 10 A 22 A
* 1 : Shielded
L
BATTERY
1
2 1E
L–R
R–Y
15 IA1
4
D
C
B
A
(Cont. next page)
Y
2
2
120A
ALT
B
1
W
BR–W
2
4 1A
10A
GAUGE
L
1
4 1L
10A
ECU–IG
3
VSC
W–R
1
40A
AM1
1 1D
L–R
1 1O
1
2
I12
IGNITION SW
IG1 4
2
L
6 2M
1
W
2 1D
2 AM1
ACC
L–R
1
1
P ow er S ource
W–R
1 2F
7. 5A
ECU–B2
16 IS 300
M OVERALL ELECTRICAL WIRING DIAGRAM
16 IS 300 (Cont’ d)
(Cont. next page)
VSC
5
A
B
C
7
6
8
R–L
R–L
B–R
A
B–R
B–R
25 A
W–G
17 IA3
W–G
7 2F
To Engine Control Module
<2–12>
BR
W–B
W–B
W–B
24
W–B
W–B
L–W
A32
ABS & BA & TRAC & VSC ACTUATOR
Y
23
AST
7 IA3
R–Y
J7
JUNCTION
CONNECTOR
From Engine Control
Module<2–12>
A
A
BS
TRC–
20 B
BR
1
1
TRC+
11 B
R–Y
2
1
10 IA1
G
19
18 IA3
NEO
26 C
G
9
ENG–
18 B
P
20
FRO
P
10
L–B
33
L–B
17
13 B
STP
ENG+
T7
TRAC OFF SW
29
3 B
BZ
9 B
LG–R
32
4
To Parking Brake SW
<22–4>
34
CSW
7 C
Y–R
28
PKB
21 B
W–B
31
W–B
1
SRRH SRRR SRC2 SRM2 SFRH SFRR SRLH SRLR SM1+ SM1– SM2+ SM2–
5 B
IG1
8 IA3
B1
BRAKE FLUID
LEVEL WARNING SW
8
SFLR
GND3 GND4
15 D 22 D
Y–R
W–B
1
7. 5A ABS2
30
7 B
W–R
LBL
3 A
W–B
Y–R
L–B
G–B
B–L
B–R
B
G–W
G
B–W
B–O
G–R
18
FSW–
SKID CONTROL ECU
GND1 GND2
2 A
4 C
FSW+
To Headlight Beam
Level Control ECU
<8–2>
AST
6 D
5 C
G–R
4 D
From Stop Light SW
<6–4><26–4>
5 D
RR–
L–R
2 D
15 B
RR+
V10
VSC WARNING BUZZER
3 D
B–R
1 D
16 B
RL–
B–R
23 B
RL+
R–B
7 D
R–B
8 D
2
3 IA1
W–G
5 A 21 A 16 D
G–Y
L–O
L–Y
L–R
B–Y
G–O
26
SRC1 SRM1 SFLH
W–G
FR+
2
27
B10
BRAKE PEDAL
LOAD SENSING SW
9 A
4 IA1
B
8 A
B
7 A
16 IB1
GR
6 A
B
GR
22 B
13 A
FR–
SRC1 SRM1 SFLH SFLR SRRH SRRR SRC2 SRM2 SFRH SFRR SRLH SRLR SM1+ SM1– SM2+ SM2–
4 A
GR
A30
ABS SPEED SENSOR
REAR RH
12 A
FL+
L
R
28 A
FL–
YSS
6 IB1
2
1
S15 A , S16 B , S17 C , S18 D
31 A
16 BC2
7 BC2
22 IB1
B
1
O
B
27 A
3 C
GYAW
LG
20 C
VYS
V
1 C
YAW2
10 IB1
(Shielded)
Y
10 C
YD
1
1
A
B–R
A J6
JUNCTION
CONNECTOR
2
5
L
16 C
GL2
GYAW
8
R
22 C
GL1
VYS
1
G
BR
W
2002 LEXUS IS 300 (EWD451U)
21 C
YAW2
2
2
L
YD
6
1
R
GL2
2
2
A29
ABS SPEED SENSOR
REAR LH
GL1
4
A8
ABS SPEED SENSOR
FRONT RH
A7
ABS SPEED SENSOR
FRONT LH
Y1
YAW RATE SENSOR
1
A
D
5 2B
A
J5
JUNCTION
CONNECTOR
A
W–B
Cowl side
panel LH
A
ID
EC
Left Fender
apron
IH
Cowl side
panel RH
M
B
A
To Data Link
Connector 3
<2–4><2–5>
W–L
27 C
2002 LEXUS IS 300 (EWD451U)
SP1
2 B
12 A 19 A
17 A
W–B
Front floor
panel center LH
Y–G
BR–W
BR–W
W–B
IE
BRAKE
6 A
C 9 A , C10 B
COMBINATION METER
9 A
ABS
Front floor
panel LH
BRL
8 B
3 B
TRAC OFF
BJ
IG1
1
WA
1 B
11
4 B
SLIP
2 1I
S19
STEERING
SENSOR
7
TRIG
WT
4 B
VSCW
14 B
VSC
5 B
VSC
2 1A
2
6
W
BAT
TRIG
6 C
W–L
ESS
8
SS1–
LG–B
3
LG
SS1+
24 B
+BO
SKID CONTROL ECU
SS1–
IND
6 B
10
R–L
18 C
SS1+
D/G
S15 A , S16 B , S17 C , S18 D
W–R
28 C
L–Y
TS
9
Y–B
10 B
B–R
R–L
16 IS 300 (Cont’ d)
12
M OVERALL ELECTRICAL WIRING DIAGRAM
L–Y
Y–B
Y–B
L–Y
LG
W–L
R–Y
B–R
R–Y
Y–G
W–L
LG
B–R
MEMO
2002 LEXUS IS 300 (EWD451U)
2002 LEXUS IS 300 (EWD451U)
1
1
BATTERY
120A
ALT
W
2
2
L–B
2
3
2
L–Y
L–B
R+
1
1 A
MR
MT
W–L
MR
G
VCM
7
16
Y
E2
G–O
L
BS
8
B–Y
SFLR
18
L–R
30
26
L–Y
SRC1 SRM1 SFLH
8 A
31
9 A
28
34
32
5 A 21 A 16 D
29
8 D
17
7 D
33
1 D
24
AST
SRRH SRRR SRC2 SRM2 SFRH SFRR SRLH SRLR
L–O
23
27
R–L
SFLR SRRH SRRR SRC2 SRM2 SFRH SFRR SRLH SRLR
7 A
G–Y
PMC
6 A
G–R
A31
ABS & BA & TRAC ACTUATOR
6
4 A
SRC1 SRM1 SFLH
RR–
15 B
B–O
B–L
Cowl side panel RH
FSS
RR+
16 B
B–W
W–B
ABS MTR RELAY
ABS SOL RELAY
L–W
IH
L–Y
MT
E3
21 D 18 D 12 D 13 D 31 A
RL–
23 B
SKID CONTROL ECU
RL+
22 B
G
2
3
FR+
13 A
G–W
M
4
FR–
12 A
S15 A , S16 B , S17 C , S18 D
FL+
28 A
VCM2 PMC2
FL–
* 1 : Shielded
B
A
(Cont. next page)
B
GND
+BM
23 A 14 D
V
27 A
A7
ABS SPEED SENSOR
FRONT LH
SR
LG
MRF
24 A 10 A
B
2
4
O
4
1
2
A8
ABS SPEED SENSOR
FRONT RH
3
6
L
2
R
2
L
60A
ABS1
1
L–R
2
L
1
L
2
16 IB1
6 IB1
22 IB1
16 BC2
7 BC2
1
2
4
GR
10 IB1
1
2
R
1 1O
L–R
2
1
A29
ABS SPEED SENSOR
REAR LH
R–Y
2
1
L
1
40A
AM1
IG1 4
ACC
3
GR
B
2
L
2
I12
IGNITION SW
2 AM1
2
A B S and T raction C ontrol
A30
ABS SPEED SENSOR
REAR RH
GR
B
1
W
2 1D
1
P ow er S ource
B
1
17 IS 300
M OVERALL ELECTRICAL WIRING DIAGRAM
Y
L–W
(*1)
17 IS 300 (Cont’ d)
A B S and Trac tion C ontrol
5
7
6
8
L–R
A
L–R
To Engine Control
Module<2–12>
1 1D
2
4 1L
2 1E
R–L
C 9 A , C10 B
4 C
FSW+
FSW–
7 B
IG1
SLIP
5 C
TRAC OFF
D/G
ABS
28 C
TS
BRAKE
10 B
TRC–
COMBINATION METER
17 A
R–B
20 B
TRC+
W–G
11 B
NEO
W–R
26 C
W–L
ENG–
10A
GAUGE
17 IA3
W–G
18 B
ENG+
7 IA3
R–Y
9 B
FRO
10 IA1
G
13 B
STP
P
L–B
W–R
G–R
2002 LEXUS IS 300 (EWD451U)
3 B
18 IA3
3 IA1
B–R
4 IA1
8 IA3
10A
ECU–IG
R–B
W–G
To Data Link
Connector 3
<2–4><2–5>
R–Y
G
P
L–B
W–G
To Headlight Beam
Level Control ECU
<8–2>
From Stop Light SW
<6–4><26–4>
From Engine Control
Module<2–12>
1
B10
BRAKE PEDAL
LOAD SENSING SW
S15 A , S16 B , S17 C , S18 D SKID CONTROL ECU
SM1+ SM1– SM2+ SM2–
3 D
2 D
5 D
4 D
AST
GND1 GND2
6 D
2 A
LBL
3 A
25 A
IND
6 B
LG–R
WA
1 B
BRL
8 B
SP1
2 B
Y–G
R–Y
(A/T)
12 A 19 A
6 A
9 A
3 B
4 B
L–Y
LG
W–L
Y–G
BR–W
R–Y
(A/T)
SNOW
W–L
13
LG
L–Y
5 B (M/T)
SNOW
A12
A/C CONTROL
ASSEMBLY
2 B
WT
4 B
B–Y
4 A (A/T)
TRAC OFF
MPX–
1
1 A (A/T)
4 B (M/T)
BR
A
J7
JUNCTION
CONNECTOR
See Multiplex
Communication
System<10–3>
A
BR
W–B
W–B
W–B
W–B
W–B
Y
A31
ABS & BA & TRAC ACTUATOR
T7 A
1
T14 B
1
TRAC OFF SW
2
CSW
7 C
TRAC OFF SW AND SNOW SW
SM1+ SM1– SM2+ SM2–
Y–R
19
PKB
To Parking Brake SW
<22–4>
7. 5A ABS2
9
W–B
B1
BRAKE FLUID
LEVEL WARNING SW
1
20
W–B
Y–R
W–B
W–B
Y–R
L–B
G–B
B–L
B–R
1
2
10
GND3 GND4
15 D 22 D 21 B
7 2F
B
Y
5 2B
A
J5
JUNCTION
CONNECTOR
BR–W
A
W–B
Cowl side
panel LH
A
ID
EC
Left Fender
apron
IH
Cowl side
panel RH
IE
Front floor
panel center LH
M
W
LG–B
7. 5A SRS–B
W
W
W–B
2002 LEXUS IS 300 (EWD451U)
5 2L
120A ALT
B–L
2
3
GR–L
P–L
L–W
LG
20A AM2
W–B
(S/D)
W–B
W–B
(S/D)
Left fender
apron
W–B
A
ID
A
5 1G
W–B
EC
S12
SIDE AIRBAG
SENSOR RH
4
ESR
2
Cowl side panel LH
J5
JUNCTION CONNECTOR
A25
AIRBAG SQUIB
(Steering Wheel
Pad)
SPIRAL
CABLE
1
2
P–
11 B
A24
AIRBAG SQUIB
(Front Passenger
Airbag Assembly)
Y–R
Front floor panel RH
1
LG
VUPR SSR+ SSR–
L–Y
S11
SIDE AIRBAG
SENSOR LH
4
P
ESL
1
P+
10 B
RBE+
8 C
Y–G
BK
A11
AIRBAG SENSOR
FRONT RH
3
GR
SSL–
W–B
3 1J
D–
13 B
D+
14 B
Y–B
A10
AIRBAG SENSOR
FRONT LH
2
E1
27 B
Y
VUPL SSL+
1
VUPR SSR+ SSR– ESR
12 C 9 C 7 C 10 C
CENTER AIRBAG
SENSOR ASSEMBLY
LBE+
11 A
2
S13
SIDE AIRBAG
SQUIB LH
1
2
S14
SIDE AIRBAG
SQUIB RH
1
SFR–
2 C
SFR+
1 C
SFL–
5 A
SFL+
6 A
6 C
2
PR–
5 C
1
PR+
PL–
1 A
PL+
2 A
Y–R
B
1
VUPL SSL+ SSL– ESL
7 A 10 A 12 A 9 A
SIL
TC
C4 A , C5 B , C6 C
12 B
19 B
2
P15
PRETENSIONER RH
Y–G
B
2
W–R
1
BR
2
1 IG2
2 IG2
W–R
B–W
3 IG2
BR
BR–W
4 IG2
–SR
20 B
+SR
9 B
–SL
26 B
LA
3 B
1
P14
PRETENSIONER LH
Y–R
IH
W–R
Y–G
Cowl side
panel RH
Y–V
BATTERY
40A AM1
5 2B
Y–L
B–W
4 2J
Y–V
1
Y–L
BR–W
+SL
15 B
7. 5A IGN
2
L
E2
28 B
B–O
ACC
10A SRS–ACC
1
1
GR–L
2
L
B–Y
6 B
B–Y
IG2
To Data Link
Connector 3<2–4>
R–W
5 B
R–W
GSW2
To Data Link
Connector 3<2–9>
23 B
W
ICR–
W
3 C
To Data Link
Connector 3<2–5>
ICR+
P–B
4 C
2 2J
P–B
(*1)
ICL–
2 1J
P–B
(*1)
6 BH1
P–B
(*2)
4 A
3 2J
B–Y
P–B
(*2)
ICL+
To Engine
Control
Module<2–12>
2 IG3
11
2A
P–B
3 IG1
Y–B
3 A
2
2 2G
8
Y
1
1
6 1D
4
Y–B
1
2
13 2H
16
3
* 1 : w/ Power Seat
* 2 : w/o Power Seat
Y
1
1
B–R
B–Y
1 1O
C17
CURTAIN SHIELD
AIRBAG SQUIB RH
5
1H
C9
SRS WARNING LIGHT
[COMB. METER]
1 2C
W–R
20 IA3
C16
CURTAIN SHIELD
AIRBAG SQUIB LH
5
1D
LG–B
1
2
B–R
R
R
I12
IGNITION SW
ST2
IG2 6
IG1
ACC 3
2
To Buckle SW LH
<10–5>
2 1D
7 AM2
2 AM1
LG–B
S RS
To Buckle SW RH and
Seat Belt Warning
Occupant Detection
Sensor<10–4>
3 2G
1
P ow er S ourc e
18 IS 300
M OVERALL ELECTRICAL WIRING DIAGRAM
J16
JUNCTION
CONNECTOR
W–B
(W/G)
19 IS 300
P ow er S ource
C igare tte Lighter and P ow er O utlet
1
C lock
G arage D oor O pener
3
2
4
B
B
R
ACC 3
2 AM1
6 2M
W
GR
(W/G)
10 2L
10A
RADIO
NO. 2
15A
CIG
I12
IGNITION SW
2 1D
9 1A
P
A
8
+B
P4
POWER
OUTLET
OUTSIDE TEMP.
GAUGE
6 1H
A12
CLOCK
[A/C CONTROL
ASSEMBLY]
5 1N
GND
L–Y
2
18
A
W4
WIRE TO
FFC HOLDER
A
W
W–B
W–B
120A
ALT
1
1
7 1E
1
2
+B
6 2G
5 2B
W–B
(W/G)
H
J5
JUNCTION
CONNECTOR
1 IJ1
W–B
ID
W–B
Cowl side
panel LH
W–B
EC
W–B
(W/G)
Left fender
apron
A
W4
WIRE TO
FFC HOLDER
H
W–B
A
W–B
GND
2
5 1G
BATTERY
1 2I
1
W
B–L
P26
POWER OUTLET
(Luggage)
2
V5
GARAGE DOOR OPENER
[VANITY LIGHT LH]
20A
ECU–B1
W–B
(W/G)
P
(W/G)
W–B
2
2
L–Y
1
5
1
1
P27
POWER OUTLET
RELAY
3
7
ACC
1
GR
(W/G)
GR
(W/G)
1
1
P
P
W
C7
CIGARETTE
LIGHTER
R–Y
1 1O
GR
A
1 IH1
J10
JUNCTION
CONNECTOR
A
GR
(W/G)
7 2H
6 2I
GR
40A AM1
15A PWR OUTLET
3 1E
1
W
(W/G)
1
7. 5A
DOME
10A
MPX–B
2
2
B
2002 LEXUS IS 300 (EWD451U)
1 2C
6 1D
IG1
BK
Front floor
panel RH
Cowl side
panel RH
IH
BJ
Front floor
panel LH
M
40A
AM1
W
1
L+
L
GR
GR
(Shielded)
L–Y
L–Y
2002 LEXUS IS 300 (EWD451U)
B–L
A26
ANTENNA
AMPLIFIER
R2
RADIO AND PLAYER
TX+
5
BR
R–W
BR
GND
RR+
5 A
RR–
14 A
WR+
6 A
WR–
15 A
2
B
WOOFER
R9
REAR SPEAKER AND WOOFER LH
1
3
2
1
WOOFER
R10
REAR SPEAKER AND WOOFER RH
REAR SPEAKER
4
3
B–W
REAR SPEAKER
4
10 BC2
1 BC2
B
18 BC2
3 IB3
B
9 BC2
Y
11 BC2
9 IB3
Y
2 BC2
7 IH4
1 IH4
11 IH4
10 IH4
9 IH4
8 IH4
B–W
Y–R
Front floor panel
center RH
WL–
11 A
Y–R
R
20
WL+
4 A
R
W
IF
BR
TX–
15
RL–
10 A
W
R–W
B
16
RL+
3 A
FR–
9 A
R–W
W–L
1
G
S–GND
GND(E)
12 A
FR+
2 A
W–L
13
R
R–
18
B
L–
19
Y
R+
8
R–Y
ANT+B
L+
W
9
TX–
10 B
B
7
TX+
1 B
Y
MUTE
GND(E)
14 B
B–W
11
GND(S)
15 B
Y–R
ACC+B
R–
FL–
8 A
R
1
L–
FL+
1 A
W
BU+B
R+
9 B 17 B 18 B
S6 A , S7 B
STEREO COMPONENT AMPLIFIER
CTX–
11 B
9 II1
2
4
R–W
BATTERY
L–Y
2
20A
RADIO
NO. 1
L–Y
8 B
GR
MUTE
R–L
CTX+
To Navigation ECU
<25–2>
7 B
Y–B
2 B
T12
TWEETER LH
1
GR
G
(*1)
1 II1
1
3
F14
FRONT DOOR
SPEAKER RH
1
2
4
* 1 : w/ LEXUS Navigation System
* 2 : w/o LEXUS Navigation System
T13
TWEETER RH
W–L
1
120A
ALT
1
From Navigation ECU
<25–1>
5 B
From Multi–Display
<25–2>
NAVI–MUTE
Y–R
ACC+
G–B
(*1)
P
(*2)
16 A
J10
JUNCTION
CONNECTOR
From Navigation ECU
<25–3>
A
A
V
(*2)
BU+B
A
P
(*1)
P
V
(*1)
Y
5 ID2
2
V
1 ID2
1
4
B
LG
7 A
GR
10A
RADIO
NO. 2
3
F13
FRONT DOOR
SPEAKER LH
1
2
LG
L
1
5 2F
9 1A
6 1D
3
R
9 2G
R
2
L
2
IG1
ACC 3
12 2B
I12
IGNITION SW
2 AM1
1
R adio and P layer (S /D )
W
1 1O
1
2
2 1D
W
P ow er S ource
20 IS 300
M OVERALL ELECTRICAL WIRING DIAGRAM
(Shielded)
21 IS 300
P ow er S ource
F ront W indow D eicer
1
2 AM1
R ear W indow D efogger and M irror H eater
S hift Loc k
3
4
2
ACC 3
R
IG1 4
L–R
R
R–L
11 1H
4 2H
1 2C
10 2H
10A
ECU–IG
10A
GAUGE
1
15A
MIR
HTR
13 2I
9 1A
2
A
B–R
DEICER
RELAY
1
4
2
3
1
RR DEF
RELAY
2
5
2
3
5
MIR HTR
RELAY
NOISE
FILTER
(DEF CDS)
1
1
2
4
IG
LG–B
1
GR–B
To Body ECU
<10–1>
40A RR DEF
1
3
G–W
A
2
40A
AM1
STP
NSSD
MT3
10
ACC
1
6
P1
5
P
1 1O
11 1K
10 1K
10 1L
G–R
G–R
SLS–
KLS+
G
2
G–W 1
L–R
L
4
5
SHIFT LOCK
SOLENOID
E
9
4
U1
KEY INTERLOCK
SOLENOID
[UNLOCK WARNING SW]
3
A
J7
JUNCTION
CONNECTOR
A
BR
W–B
W–B
(W/G)
REAR WINDOW
DEFOGGER
SHIFT LOCK
CONTROL SW
G–R 3
BR
2
8
L–R
1
R12
MIRROR HEATER RH
[REMOTE CONTROL MIRROR RH]
W–B
R11
MIRROR HEATER LH
[REMOTE CONTROL MIRROR LH]
G–R
1
2
W–B
W–B
(W/G)
W–B
B–L
7 2F
5 2B
A
Left side of the
back panel Upper
J5
JUNCTION
CONNECTOR
A
ID
Cowl side panel LH
W–B
BM
SLS+
3 2K
W–B
EC
To A/C Control
Assembly<24–6>
D
J11
JUNCTION
CONNECTOR
W–B
W–B
W–B
B
(S/D)
1
1 BK2
N2
NOISE FILTER
(Rear Window
Defogger)
D
P2
S5
SHIFT LOCK
CONTROL ECU
12 2K
13 ID2
7 1B
2 BK2
Left fender
apron
1 2G
G–O
7 1L
8 2L
B
(W/G)
3 BK2
BATTERY
3 2H
W–B
B
(S/D)
1 BJ1
B
(W/G)
3
1
W–B
(W/G)
W–B
1
2 1A
1 2D
B
(W/G)
1 B
5 1G
8 IB3
R19 A , R20 B
1 A
REAR WINDOW
DEFOGGER
B
120A
ALT
2
B
2
F17
FRONT WINDOW DEICER
1
B
(W/G)
1
1
3 1D
B
B
W
W
2002 LEXUS IS 300 (EWD451U)
2
J10
JUNCTION
CONNECTOR
GR
GR
NOISE
FILTER
(DEF CDS)
20A
FR
DEF
From Stop Light SW
<6–4><26–4>
10A
RADIO
NO. 2
From Engine Control Module
<14–7>
3 1H
6 1D
From A/T Indicator Light SW
[Park/Neutral Position SW]<14–7>
1 1D
B–R
2 1D
W
B–R
W
I12
IGNITION SW
IH
Cowl side panel RH
M
LG–B
2
1
2002 LEXUS IS 300 (EWD451U)
R
(M/T)
R–L
(M/T)
D
R–Y
(M/T)
B–L
R–L
(M/T)
BR–W
IE
SPEEDOMETER
Front floor panel center LH
Y
V9
VEHICLE SPEED SENSOR
(Combination Meter)
SI
Y
4 BC2
F15
FUEL
SENDER
3
2 1E
7
MPX1
MPX2
8
20 A
17 A
BUZZER
10A
GAUGE
1 1D
2 1H
7 1H
15 A
21 A
16 A
1
C
C
PKB
3 A
MPX+
10 B
Y–R
3
SE
R–L
(M/T)
R
(M/T)
2
R
(M/T)
R–Y
(M/T)
IG+
R–Y
(M/T)
1
(A/T)
8 EA2
TACHOMETER
2
MPX2
5 B
Y–R
6 EA2
1
BODY ECU
B5 A , B6 B
13 A
O
FR
14 A
FE
13 A
BR–W
14 IH3
FUEL
16 IA1
2
5
BC2
W–L
(M/T)
W–L
(A/T)
W–L
(M/T)
9 1K
L
11 IA3
F16
FUEL
SENDER
(Sub)
BR–W
MOMENTARY FUEL
CONSUMPTION
O
7 EA2
J2
JUNCTION
CONNECTOR
12 A 19 A
B
R–L
(M/T)
C 9 A , C10 B
Y–R
Y–R
C
C
P3
PARKING
BRAKE SW
Y–R
C
A/C CONTROL
ASSEMBLY
4
(Cont. next page)
From Skid Control ECU
<16–7><17–6>
From Daytime Running
Light Relay(Main)<3–4>
From Multi–Display
<25–2>
COMBINATION METER
A12 A , A13 B
DOOR
D
1 B
LCD
B
WATER TEMP.
BATTERY
1
1
1
W
2
B
1
W
1
1 1O
B
6 2M
B
B
J7
JUNCTION
CONNECTOR
W–L
(M/T)
W–L
(M/T)
W–L(A/T)
W–L
W–L
(A/T)
14 A
From Engine Control
Module<2–11>
From Multi–Display
<25–2>
From Navigation ECU
<25–2>
3
R–L
1 2C
From Engine
Control Module
<2–4>
1
40A
AM1
R–L
(M/T)
W–L
(A/T)
R–Y
120A
ALT
10A
MPX–B
2
IG1 4
L–R
2
LG–B
20A
ECU–B1
R–Y
2 1D
W
5 2H
I12
IGNITION SW
2 AM1
ACC
R–Y
LG–B
C ombination M eter
L–R
3 2G
1
P ow er S ource
R–Y
7. 5A
SRS–B
22 IS 300
M OVERALL ELECTRICAL WIRING DIAGRAM
R
M
J6
JUNCTION
CONNECTOR
Y–R
O
T6
THEFT DETERRENT ECU
VOLT
See VSC System or
ABS and Traction
Control System
<16–10><17–7>
22 IS 300 (Cont’ d)
C ombination M eter
BEAM LEVEL
SLIP
TRAC OFF
ABS
VSC
MALFUNCTION
INDICATOR LAMP
REAR LIGHTS
SRS
ILLUMINATION
BRAKE
CRUISE
FUEL
ECT PWR
SNOW
SEAT BELT
OIL LEVEL
OIL PRESSURE
CHARGE
Y
BR
See Headlight Beam Level
Control System<8–2>
See VSC System (w/ VSC)or
ABS and Traction Control
System(w/o VSC)<16–11><17–8>
See VSC System<16–11>
See Engine Control and
Engine Immobiliser System
<2–3>
See Taillight and
Stop Light System<6–3><26–3>
See SRS System
<18–3>
See Illumination
System<5–2>
See VSC System (w/ VSC)or
ABS and Traction Control
System(w/o VSC)<16–11><17–8>
To Daytime Running Light
Relay(Main)<3–4>
See Headlight
System<3–3>
BR
5 2B
BEAM
TURN RH
TURN LH
SECURITY
7 2F
See Illumination
System<5–2>
See Headlight
System<3–3>
See Turn Signal and
Hazard Warning Light
System<4–3>
See Theft Deterrent System
<11–3>
2002 LEXUS IS 300 (EWD451U)
W–B
IH
Cowl side panel RH
A
J7
JUNCTION
CONNECTOR
11 A
4 B
3 B
9 A
5 B
7 A
6 B
8 A
10 A
6 A
9 B
5 A
18 A
22 A
COMBINATION METER
4 A
3 A
2 A
8 B
8
7
6
5
C 9 A , C10 B
A
M
W
L
1
W
W4
WIRE TO
FFC HOLDER
W–B
2002 LEXUS IS 300 (EWD451U)
L–B
3
3
W–L
L–B
B–L
W–B
3
L–R
W–B
1
FAN NO. 3
RELAY
3
2
2
1
L–W
L–B
A
3
1
M
2
A
A
5
2
3
3
1
3
L–W
A4
A/C SINGLE
PRESSURE SW
W–B
W–B
W–B
3
L–W
3
5
3
L–B
L–B
R1
RADIATOR
FAN MOTOR
Cowl side panel RH
C
IH
1
2
C
C
W–B
W–B
EC
A2
A/C CONDENSER
FAN MOTOR
To A/C COMP
Relay<24–2>
2
M
1
3
B–R
L–B
Left fender apron
5
4
3
B–R
8 EA3
J3
JUNCTION
CONNECTOR
C L–B
L–B
BJ
3
3
3
L–Y
L–W
2
3
2
1
3
B–R
4
J3
JUNCTION
CONNECTOR
Front floor panel LH
1 IJ1
H
B–R
FAN NO. 2
RELAY
BATTERY
E
7 2A
10 2H
W–B
1
120A
ALT
I14
COMPASS
[INNER MIRROR]
L–W
1
30A
CDS
FAN
2
W
H
4
3 1H
10A
ECU–IG
3
FAN NO. 1
RELAY
1
30A
RDI
FAN
2
W
IG
1
B
B
3 1N
W4
WIRE TO
FFC HOLDER
1
L–R
B–R
1
40A
AM1
IG1 4
ACC
1 1D
L–R
W
L
R adiator F an and C onde nser Fan
W
1 1O
1
2
2 1D
I12
IGNITION SW
2 AM1
2
C ompass
L
1
1
P ow er S ource
W
B–R
2
23 IS 300
M OVERALL ELECTRICAL WIRING DIAGRAM
To Engine Control
Module<2–11>
W2
WATER TEMP.
SW
W–B
D7
DIODE(A/C)
L–B
MEMO
2002 LEXUS IS 300 (EWD451U)
24 IS 300
R–Y
L–W
W
B
2002 LEXUS IS 300 (EWD451U)
L–W
L–W
P
From Diode
(A/C)<23–3>
Front side of the
intake manifold
3
M
2
Instrument panel
reinforcement RH
R
B–L
B2
BLOWER MOTOR
M–
2 B
GND
1 A
B
M+
1 B
1
SI
W–B
W–B
W–B
W–L
BR
J19
JUNCTION
CONNECTOR
L
To Engine Control
Module<2–12>
L
EC
E3 A , E4 B , E7 E
18 A
TAM
1
2
C
C
34 B
E2
MPX1
21 B
ENGINE CONTROL MODULE
Left fender apron
A4
A/C DUAL PRESSURE SW
IG
4
1
25 A
PRE
34 E
LCK1
LG–R
EA
2
1
+B
2 A
L
3 A
3 IF2
1 IF2
V
2 IF2
W–L
L–Y
BATTERY
3
P
5 EA1
5
J10
JUNCTION
CONNECTOR
L
A
3
3
A
V
1
A
A
2
3
A
GR
W–B
1
120A
ALT
12 2I
A/C COMP
RELAY
3
GR
W–B
2
2 2D
3
1
9 1A
10A
RADIO
NO. 2
BR
2
20A
ECU–B1
2
1 2C
2
5
L–R
L–R
10A
ECU–IG
6 1D
J2
JUNCTION
CONNECTOR
1
1
W
40A
HEATER
HTR
RELAY
1
12 2H
9 1G
10A
A/C
3 1H
4
BR
1
40A
AM1
1
12 1H
1 1D
3
1 IA3
L
1
1 1O
1
2
L–R
L–R
6 2M
10A
MPX–B
W
2 1D
IG1 4
R
B–R
I12
IGNITION SW
W 2 AM1
ACC 3
2
A utomatic A ir C onditioning
R
6 2I
1
P ow er S ource
L
V
L
GR
B–R
R–Y
F
E
D
C
B
A
(Cont. next page)
M OVERALL ELECTRICAL WIRING DIAGRAM
L
A1
A/C AMBIENT TEMP.
SENSOR
LG–R
BLOWER MOTOR
CONTROLLER
B3 A , B4 B
A3
A/C MAGNETIC CLUTCH
AND LOCK SENSOR
24 IS 300 (Cont’ d)
A utomatic A ir C onditioning
See Electronically
Controlled Transmission and A/T
Indicator System(A/T) or
ABS and Traction Control
System(M/T)<14–7><17–7>
See Combination
Meter System<22–3>
L–R
B–R
GR–R
R–Y
BR–W
R–W
Y–G
GR–R
W–B
GR
A/C
THERMISTOR
GR–R
V–W
GR
P–L
L–R
GR
R–Y
BR–W
R–W
Y–G
BR–W
GR–R
GR–R
P–B
LG–R
BR–W
GR–R
GR–L
L–W
GR
W–B
A15
A/C SOLAR SENSOR
BR–W
7
6
3
P–B
LG–R
V–W
B–R
P–L
L–R
J8
JUNCTION
CONNECTOR
J10
JUNCTION
CONNECTOR
BR–W
BR–W
GR–R
GR
GR
5
1
7
6
3
5 2B
BR–W
BR–W
1 2I
7 IF1
6 IF1
9 IF1
10 IF1
1 IF1
3 IF1
See Electronically
Controlled Transmission and
A/T Indicator System<14–6>
G–O
GR–L
L–W
L
B
A14
A/C ROOM TEMP.
SENSOR
BR–W
Cowl side
panel RH
IH
A22
AIR MIX CONTROL
SERVO MOTOR
A23
AIR VENT MODE CONTROL
SERVO MOTOR
A21
AIR INLET CONTROL
SERVO MOTOR
GR–R
M
M
M
2
See Multiplex
Communication
System<10–3>
From Front Wiper
and Washer SW
[Comb. SW]<9–1>
From MIR HTR Relay
<21–3>
R–Y
B–R
V
L
B
B
See Turn Signal and
Hazard Warning Light
System<4–4>
B–R
GR
L
F
BR–W B
5
1
7
6
3
5
1
1
1
B
3 A
PKB
A12 A , A13 B
2002 LEXUS IS 300 (EWD451U)
B
2 IF1
8 IF1
2 IE1
1 IE1
B
BR–W B
4 IF1
GR–R
18 A
13 B
GND
AMC
AMH
TP
15 B
14 B
TE
12 B
7 B
AOF
AOD
S5
3 B
8 B
6 B
20 B
2 B
11 B
TPM
AIR
TPI
TS
5 B
16 B
TR
10 A
17 B
HR
BLW
MPX–
12 A
1 A
13 A
SNOW
5 A
P–S/B
10 B
MPX+
11 A
WIP
A/C CONTROL ASSEMBLY
AIF
SG
4 A
PWR
5 2I
8
7
6
5
1 B
HAZD
10 2H
6 A
MHTR
8 A
+B
16 A
IG
7 A
ACC
2
V
E
L
D
GR
C
B–R
B
R–Y
A
M
W–R
40A AM1
120A ALT
W
W
W–R
1
7. 5A STARTER
B–W
(A/T)
V
20A AM2
2002 LEXUS IS 300 (EWD451U)
B–W
(A/T)
B–R
10A ECU–IG
R–L
B–L
R–B
R–L
7. 5A TV
BR
From Back–Up Light SW
[Park/Neutral Position
SW](A/T) or
Back–Up Light SW(M/T)
<6–4>
B
B
W–B
(S/D)
To Stereo Component
Amplifier<20–2><28–4>
4 IH3
W–L
W–B
(S/D)
BK
Front floor panel RH
J16
JUNCTION
CONNECTOR
To Tweeter LH
<20–3><28–2>
5 IH4
6 IH4
AUO–
11 B
B
3 A
AUO+
2 B
SYNC
8 A
P
Front floor panel
center RH
From Clutch Start SW
<1–2>
R–B
1 IH3
GND
17 B
VG
P
V
IF
J6
JUNCTION CONNECTOR
V
BR
BR
REV
14 B
G
SPD
5 B
G–B
MUTE
15 B
(Shielded)
6 A
2 A
R
7 A
G
TX1–
10 A
NAVIGATION ECU
N4 A , N5 B
VR
1 A
B
AUI+
Y
1 B
TX1+
5 A
1 IH1
ACC
18 B
RE
SGND
GR
1
2 IH3
RE1
10 A
4
3 IH3
G–B
BATTERY
V
(Shielded)
AUI–
G
10 B
13 IH3
12 IH3
SGD1
22 A
G–B
1
B–R
11 IH3
CTX+
5 B
G–R
2
To Data Link
Connector 3
<2–9>
R
10 IH3
B
W
9 IH3
CTX–
10 B
G–R
+B
To Stereo
Component
Amplifier<20–2>
<20–3><28–4>
From Stereo Component
Amplifier<20–3><28–3>
VR
1 B
GR
9 B
To Parking Brake
SW<22–4>
2
V
1
(Shielded)
8 IH3
Y
14 IH4
G
13 IH4
R
2 B
R
5 IH3
G
7 B
W
1
B
3 B
(Shielded)
1
B–W
(M/T)
4 1A
Y–R
Y–B
1 1E
To Combination
Meter<22–2>
G
SYNC
8 B
O
1 2C
W–L
G–B
To Theft
Deterrent ECU
<11–4>
Y–R
A
A
VG
6 B
4
6
GND
ACC
3
A
A
ACC
14 A
GR
1 1O
L–R
1 1D
G–W
6 IH3
TC
16 A
GND1 GTX+ GTX– PKB SPD
DR
25 A 5 A 18 A 17 A 4 A 7 A
(Shielded)
1
B–W
4 1D
IG
ST1
+B1
1 A 3 A 15 A
3
M 4 A , M 5 B MULTI–DISPLAY
R–W
R–W
2
7 2E
R
2
GR
1
W
2 1D
V
ST2 8
IG2
IG1 4
ACC 3
LE X U S N avigation S ystem
R
A
A
9 1A
6 1D
10A RADIO NO. 2
20 IA3
1
I12
IGNITION SW
7 AM2
2 AM1
P ow er S ourc e
25 IS 300
M OVERALL ELECTRICAL WIRING DIAGRAM
J10
JUNCTION CONNECTOR
GR
GR
R15
REMOTE CONTROLLER
(Navigation)
(Shielded)
BR
W–B
(W/G)
To Combination
Meter<22–2>
26 IS 300
L–R
G–R
To Engine
Control Module
<2–12>
To Shift Lock
Control ECU
<21–4>
V–G
G–Y
G–W
G
W–B
G–B
G–B
J13
JUNCTION
CONNECTOR
G
H19
HIGH MOUNTED
STOP LIGHT
G–W
G–Y
G–W
G
N3
NOISE FILTER
(Stop Light)
W–B
R7
REAR COMBINATION
LIGHT RH
STOP
TAIL
TAIL
R6
REAR COMBINATION
LIGHT LH
STOP
TAIL
R8
REAR COMBINATION
LIGHT RH
STOP
TAIL
R5
REAR COMBINATION
LIGHT LH
STOP
G–W
G
G
G–R
J18
JUNCTION
CONNECTOR
R16
REAR SIDE MARKER LIGHT
RH
LH
J18
L1
JUNCTION
LICENSE PLATE
CONNECTOR
LIGHT LH
G–B
G–B
L2
LICENSE PLATE
LIGHT RH
G–B
F6
FRONT SIDE MARKER
LIGHT RH
W–B
F4
FRONT PARKING LIGHT RH
F3
FRONT PARKING LIGHT LH
F5
FRONT SIDE MARKER
LIGHT LH
B–L
W–B
W–B
W–B
BATTERY
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
W–B
G–W
G–W
G–R
V–G
R–L
G–B
G
G
G
G
2
G–R
G–W
10A GAUGE
REAR LIGHTS
WARNING LIGHT
[COMB. METER]
C 9 A , C10 B
3 1F
15A STOP
G–B
G
G
R–W
To Theft Deterrent
ECU<11–4>
120A ALT
2
BJ1
A
W–B
A
BM
Left side of the
back panel Upper
J15
JUNCTION
CONNECTOR
W–B
A
W–B
BL
W–B
W–B
Left quarter
panel LH
2
BK2
A
W–B
W–B
W–B
1
1
2
5
5
3
3
2
1
1
BN
Right side of the
back panel lower
IH
Cowl side
panel RH
EC
Left fender
apron
2
2
3 2B
B
1
1
1
1
W–B
5 2B
3
1
3
C
A
1
4
A
G
A
2
4
2
1
C
B
A
G–W
4 BJ2
A
J17
JUNCTION
CONNECTOR
A G–Y
C
3
BJ2
C
C J18
JUNCTION
CONNECTOR
B
2
2
2
2
E
G–R
3
BK1
E
G–R
C
C
G–R
1 BK1
1
E
G
2
BJ2
G
2
BK1
HS–
1
GND
J17
JUNCTION CONNECTOR
E
G
6 2B
1 2B
ST–
T–
2
9
1 BJ2
ST+
IL
2002 LEXUS IS 300 (EWD451U)
W
6 2H
7
L3
LIGHT FAILURE SENSOR
4
8
3
F
IG
T+
F
F
12 1I
40A AM1
1
G–W
1
J17
F
JUNCTION
CONNECTOR
1
G–B
5 IB1
6 1I
9 1I
13 1H
11
2
5
2
12 1K
2 1F
1 1O
6 B
7 1G
7 1F
10A
TAIL
To Skid Control
ECU<16–8><17–5>
ACC
G–W
1
2
G–R
3 1K
TAIL
RELAY
2 1E
1 1D
6 1K
2 1D
R–L
W
I12
IGNITION SW
4
3
2
1
17 A
2
3
1
S8
STOP LIGHT SW
L–R
IG1 4
2 AM1
W
Taillight and S top Light (W /G )
P ow er S ource
M
27 IS 300
W
1
BATTERY
ON
W–B
B–L
2002 LEXUS IS 300 (EWD451U)
W–B
ID
A
5 1G
9 1F
2
W–B
10
EC
12
Left fender apron
L
2
IB3
L
L
L–R
5
IB3
1
IB3
10 IA3
L
L–R
L–W
W1
M WASHER
MOTOR
3
2
6 1F
L–R
L
7
BJ2
L
8
BJ2
9
BJ2
8
BK1
9
BK1
4
BK1
LS
1 A
+B
3 A
R21 A , R22 B
C1
2 A
L
Right side of the
back panel lower
–
1 B
REAR WIPER MOTOR
BN
W–B
Cowl side
panel LH
A
13
WR
L–W
J5
JUNCTION
CONNECTOR
WASH
+1R
L
INT
CIR
15A
WASHER
OFF
EW
4 1G
1 1D
3
R ear W iper and W asher
L
2
120A
ALT
WASH
C13
REAR WIPER AND WASHER SW
[COMB. SW]
L–R
2
L
1
40A
AM1
IG1 4
I12
IGNITION SW
2 AM1
ACC
25A
WIPER
1
1 1O
1
2
2 1D
W
1
P ow er S o urc e
4
M OVERALL ELECTRICAL WIRING DIAGRAM
L–R
28 IS 300
R adio and P layer (W /G )
P ow er S ource
1
W
2 AM1
3
2
ACC 3
R
F13
FRONT DOOR SPEAKER LH
1
2
IG1
R
W
R
Y
B
A
J16
B
JUNCTION
CONNECTOR
B
W
R
B
A
A
Y
J13
B
JUNCTION
CONNECTOR
W
R
Y
B
L
LG
G
(*1)
G–B
(*1)
V(*1)
3 IB3
9 IB3
10 IH4
11 IH4
W
R
Y
B
1 A
STEREO COMPONENT AMPLIFIER
ACC+
8 A
FL+
L+
R+
L–
R–
8 B
9 B
17 B
18 B
GND(S)
15 B
GND(E)
14 B
TX+
1 B
TX–
10 B
2 A
FL–
9 A
FR+
MUTE
WL–
7 B
3 A
FR–
11 A
WL+
4 A
10 A
RL+
WR–
15 A
5 A
WR+
GND(E)
6 A
12 A
14 A
RR+
RL–
NAVI–MUTE
5 B
RR–
CTX+
2 B
CTX–
11 B
L
15
TX–
7
MUTE
3
6
5
2
4
1
AMP+
MTR
WF–
WF+
WF–
WF+
3
AMP+
GND
E
+B
W5
WOOFER
8
20
7
BR
L–Y
W–B
B
BR
BATTERY
L–Y
TX+
R2
RADIO AND PLAYER
13
Y–R
5
From Multi–Display
<25–2>
16
S–GND
ANT+B
Y–B
R–
From Navigation ECU
<25–1>
18
R–L
L–
BR
19
1 IH4
R–W
R+
7 IH4
W–L
8
8 IH4
B–W
L+
9 IH4
Y–R
9
13 IH1
L
11
ACC+B
R–W
2 IH1
W–L
B–L
1
W–L
L
R–W
R–Y
Y
B
R
G
W
GR
(Shielded)
W–L
1
BU+B
B–W
Y–R
L
20A
RADIO
NO. 1
2
1
B
A
P(*1)
1
120A
ALT
9 II1
P
(*2)
2
A
A
S6 A , S7 B
16 A
BU+B
1
GR
L–Y
L–Y
L–Y
W
2002 LEXUS IS 300 (EWD451U)
A
7 A
J10
JUNCTION
CONNECTOR
A
1 II1
V
(*2)
A
GR
1
From Navigation
ECU<25–3>
GR
L–Y
L–Y
5 ID2
S21
SQUAWKER RH
1
3
B
9 1A
2
S20
SQUAWKER LH
1
3
L
5 2F
1
LG
V
P
9 2G
1 1O
1 ID2
4
R18
REAR SPEAKER RH
1
2
B
2
1
3
T13
TWEETER RH
1
R17
REAR SPEAKER LH
1
2
W
10A
RADIO
NO. 2
12 2B
4
To Navigation
ECU<25–2>
40A
AM1
3
T12
TWEETER LH
2
R
6 1D
I12
IGNITION SW
4
F14
FRONT DOOR SPEAKER RH
1
2
B
Y
2 1D
* 1 : w/ LEXUS Navigation System
* 2 : w/o LEXUS Navigation System
3 IH4
1
B
L–Y
A26
ANTENNA
AMPLIFIER
BR
BK
XX floor
Front
panel RH
IF
Front floor panel
center RH
M