sunroof adjustments

SUNROOFS
Subject
Page
Single Panel Sunroof (SHD)
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sunroof Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Components
• Motor/Drive Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
• Sunroof Panels And Headliner . . . . . . . . . . . . . . . . . . . . . . . . . .
Steel Panel Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessing Adjustment Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sunroof Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Repair Manual Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sunroof Components By Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
3
4
4
6
8
10
12
14
16
Double Panel Sunroof (DSHD)
Overview . .
Features
..
Components
Operation . .
Adjustments .
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
20
21
22
23
24
Sunroof Specific SI Bulletins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
DSHD Repair Manual Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Sunroofs - 1
SINGLE PANEL SUNROOFS (SHD)
OVERVIEW
All current single panel sunroofs (with the exception of 318ti cloth foldable sunroof) incorporate the "low noise vent" feature. When the sunroof is driven to the vent position (rear of
panel up), the inside headliner moves rearward approximately 120 mm. This provides cabin
ventilation with little noise.
A water channel is incorporated into the sunroof assembly. It automatically rises when the
sunroof panel is in the vent position and prevents water from entering the interior during
braking.
VENT POSITION
PANEL
WATER CHANNEL
INTERIOR PANEL
CLOSED
FULLY OPEN
There are currently two types of sunroof panels available; Steel or Glass. Service
Procedures are different for each type. Always follow the Repair Manual procedures for the
type being services.
Sunroofs - 2
Sunroofs provide similar functionality when it comes to their various positions and features.
When looking closer, their operation and service procedures are in some cases quite
unique.
VEHICLE
E38
STEEL
Yes
GLASS
Yes
E39
Yes
Yes
E36
Yes
No
E46
No
Yes
E31
Yes
No
COMMENTS
• First vehicle to offer Glass Roof as an
option (1996 Model Year) standard on 750iL.
• Glass vs Steel panel -Headliner drive
operation different for each
• Glass roof uses “Rubber Gaiter” to conceal
drive mechanism and panel screws when in
the Vent position.
• Similar to the E38 sunroof system
• Glass vs Steel panel -Headliner drive
operation different for each
• Glass panel “Gaiter” mounting different
than E38
• Two versions of sunroof system
n up to 11/94
n 11/94 and later production
• Early version has unique mechanism for
moving headliner panel
• Later version similar to E38 style.
• ti california roof (cloth foldable sunroof
system)
• Similar to the E39 system
• No Rubber Gaiters used
• Panel “Sealing” function
• Unique system, unique service procedures
SUNROOF FEATURES
Anti Trap: This feature uses a hall sensor to detect obstructions while the sunroof is closing (pulse frequency slowed down) in the automatic close function. The anti-trap feature is
shut down prior to full closing (4mm from full closed) to allow the sunroof to seat into the
seal. Caution; the anti-trap feature is not functional when the switch is held in the manual close position.
Unloading: If the sunroof is running during engine starting, the sunroof will be deactivated. This function is to provide maximum starting power to the engine starter motor. The
SHD receives the consumer cut off signal via the K or P bus or dedicated wire.
Panel Sealing Function (E46 Only): The E46 sunroof includes a mechanical feature
designed to improve panel sealing to minimize wind noise. When closing from the vent
position, the panel moves quickly up and down close to the fully closed position. This is
due to the mechanism design but helps seat the seal evenly around the perimeter of the
panel to optimize sealing.
Sunroofs - 3
COMPONENTS (GENERAL)
MOTOR/DRIVE CABLES
The sunroof assembly utilizes two separate bowden
cables sheathed by metal
tubes. One cable is used
to drive the headliner, the
other drives the roof panel
mechanism.
The sunroof motor drives
the sunroof cables via a
gear connection.
CABLES
MOTOR
EMERGENCY
OPERATION
HEX KEY
MOTOR CONTROL
Sunroof motors of the E36 (up to 11-95 production), the california roof of the 318ti and the
tilt only roof of the Mcoupe are manually
switched power controlled motors.
Refer to ETM for specific power supply and
control circuitry.
Note: Refer to E36 Repair Manual 54 13 010
for information on sunroof motor installation.
EXAMPLE: EARLY E36
Sunroofs - 4
The motors of all other sunroof systems are connected with a sunroof module, giving them
the name “Motor/module”. The module controls the sunroof motor based on signals it
receives:
• The motor itself (hall sensor - anti-trap feature),
• The sunroof switch
• ZKE - General Module
- The comfort closing feature when the key is held in the lock position in one of the
door lock cylinders.
- Unloader signal. This signal informs the sunroof motor module to stop running the
sunroof motor when the GM receives a KL 50 start signal.
These signals are either individual circuits as on the E36 or via the K or P bus for the E38,
E39 or E46 vehicles
The module also provides diagnosis information to the General Module of ZKE for the E38.
E39 and E46 vehicles.
Sunroofs - 5
SUNROOF PANELS AND HEADLINER
Steel Panel Sunroof & Headliner:
The steel panel is made of body gauge sheet metal on a support frame. Except for the E31,
all steel panels are attached to the drive mechanism via a rear support/adjustment carriage
rail.
The headliner of these systems
is automatically driven along with
the sunroof panel when fully
open and automatically driven
closed when the sunroof is
closed.
When the sunroof panel is
placed in the vent position, the
headliner is driven back a distance of approximately 120mm
by the drive cable.
HEADLINER
PANEL
ROTARY CATCH
LINK
ARM
The headliner is linked to the
drive cable on the driver side of
the vehicle by a “link arm”.
On early (<11/94) E36 sunroofs a “rotary catch” connects the headliner to the drive cable.
When the vent position is selected the Link Arm engages the inner cable and the headliner panel is moved rearward towards the vent position.
Sunroofs - 6
Glass Panel Sunroof & Headliner:
The glass panel is made of 5mm break resistant glass. The rear support/adjustment carriage rail of the steel panel system is not used with the glass panel. The glass panel is
attached to the sunroof drive mechanism by four or six self tapping screws (system dependent). The mounting screws are also used to adjust the glass panel height.
The headliner for these systems is made of aluminum. It contains a small recessed grab
handle at the front for manual operation.
When the sunroof is moved to the vent or open position, the headliner moves to the same
positions as the steel panel system.
The link arm of a glass panel system is different
than that of the steel panel system. The closing
catch found on a steel panel sunroof link arm is
deleted from the link arm of glass panel sunroofs.
This modification allows the manual opening of the
headliner when glass panel is closed as well as
allowing the glass panel to close without automatically sliding the headliner forward.
GLASS
The headliner is however moved forward slightly by
the drive mechanism to reveal the recessed handle
for manual closing.
STEEL
With the exception of the E46, a rubber “Gaiter” (ie: bellows in repair manual) is attached
to the sunroof drive assembly and glass panel on both sides to conceal the drive linkage
when the panel is in the vent position with the headliner open.
The “Gaiter” must be removed to access adjustments.
Sunroofs - 7
STEEL PANEL OPERATION - All except E31
When the open position is selected at the switch, the motor drives the cables. The top
mechanism drops the rear support onto the headliner panel causing a metal tab on the rear
support bar to engage with a slot on the top surface of the headliner panel.
Simultaneously, the rotary catch or link arm (model year dependent) disengages from the
inner cable. Since the crossmember is connected to the outer bowden cable, the sunroof
and headliner are driven rearward by the outer bowden cable.
Sunroofs - 8
When the Vent position is selected at the switch the motor drives the cables in the other
direction. The link arm or rotary catch fully engage with the rearward driven cable pulling
the headliner back approximately 120mm.
Simultaneously, the outer cable drives the panel mechanism upward raising the rear support rail and sunroof panel to the vent position.
Sunroofs - 9
ACCESSING ADJUSTMENT POINTS (Steel Panel)
The headliner panel must be disengaged from the drive assembly and moved rearward in
order to access the roof panel attaching screws.
To do this, start with a fully closed sunroof.
Then, using the hex tool from the vehicle’s
tool kit, remove the motor access cover
and insert the hex key into the motor drive,
turning it 90O counter clockwise.
The sunroof panel will drop at the rear by
approx. 2-3 mm. At this point, the metal
tab on the crossmember will disengage
from the headliner panel, and the headliner
panel can be pushed rearward by hand.
This exposes the roof panel attaching
screws.
To re-engage the headliner panel, insert the hex tool and turn it clockwise 90 degrees. The
rear of the sunroof panel should move flush with the roof panel. The headliner panel can
now be manually moved forward until locked.
E31: The sunroof assembly for the E-31 is different. To disengage the headliner for access
to the panel attaching hardware, the following procedure must be followed:
• Start with the sunroof in the fully closed
position.
• Drive the sunroof to the vent position.
• Push outward on the left and right
metal rods located at the inside forward
edges of the headliner.
• Push the headliner back to expose the
attaching screws.
CAUTION: The sunroof panel must never be moved toward the open position when the
headliner is disengaged. Mechanical damage can occur.
Sunroofs - 10
ACCESSING ADJUSTMENT POINTS (Glass Panel)
Raise the glass panel to the vent position. Manually slide the headliner rearward to expose
the rubber gaiters (excluded on E46).
Grasp the center section of the gaiter (1)
and gently pull from its slotted mounting
on the glass panel (2). Gently work forward and rearward (A-B). The gaiters
“tear” easily if pulled from their edge.
Remove gaiter from other side of sunroof.
Do not attempt to pull the gaiter from the
slide mechanism on the lower edge. The
gaiter is attached to the slide mechanism
by screws (Refer to Repair Manual).
With the gaiters removed, the panel
adjustment screws are exposed.
Example - E39: Two screws at the rear of
the panel on each side (1) are visible. An
additional screw (2) on each side is also
located at the front edge.
Sunroofs - 11
SUNROOF ADJUSTMENTS
The adjustment dimensions for all sunroof panels are:
Achieving these adjusted dimensions is different for Steel and Glass Panels.
STEELS PANEL (except E31)
The rear height adjustment is achieved by
removing each nut and screw (2) and sliding the adjustment wedge (1) in or out on
the rear support (3) to achieve the correct
height. A little trial and error is usually
required to achieve the desired position.
Once correct, replace bolts and nuts and
tighten to correct torque specification
(refer to technical data).
The front height adjustment is achieved by
removing screws (1) on each forward
bracket. Push the panel up or down to
achieve the correct height.
Replace screws with new or use old
screws coated with loctite 270. Tighten to
specification
Sunroofs - 12
E31 STEEL PANEL
The E31 steel panel is attached to the
drive mechanism on each side by
three nuts.
The center nut is a pivot allowing the
panel to rock in the slotted mounting
tabs at the front and rear.
Loosen the panel nuts slightly so the
panel can be positioned into adjustment by pivoting.
Example:
Early E31
Once desired adjustment is achieved, tighten screws
GLASS PANEL ADJUSTMENT
Glass sunroof panel adjustment is similar to the
E31. The panel is attached by three screws on
each side.
Using special tool 002 130, loosen screws slightly.
Move panel up or down into correct position.
Tighten screws.
Glass Panel Adjustment Tool:
Special tool 00 9 315 can be used as a depth
gauge when placed on the front edge of the
sunroof opening.
Sunroofs - 13
REPAIR MANUAL
The repair manual of TIS contains
adjustment procedures and sunroof component R&R procedures
for all model vehicles except the
E31 and prior.
When servicing an E31 sunroof,
refer to E31 Repair Manual
Microfiche #5.
Additionally, the repair manual contains “Notes” on gasket (seal)
repair and installation.
INITIALIZATION
Sunroofs controlled by a control
module
require
initialization.
Initialization allows the control
module to learn the end positions
of the motor's travel. The hall sensors provide pulses for motor rotation, the control module counts the
pulses and determines where the
panel is by memorizing the stored
pulses.
If the system is not initialized, the
sunroof will only operate in the tilt
up and slide close positions.
INITIALIZATION PROCEDURE
• Press and hold the sunroof switch in either the tilt up or slide close positions for 15 seconds.
• The sunroof motor operate momentarily signifying initialization acceptance.
The control module memorizes the pulses from the hall sensors on the next activation of
the motor by driving the panel to its end run positions. The control module senses an
amperage increase and determines the end run position. The counted number of pulses is
then used as the basis for calculating the panel position.
Sunroofs - 14
ADJUSTMENTS
Group 54 12 of the repair manual
includes:
• Adjusting glass sliding/tilting
sunroof
• Adjusting sunroof (steel)
• Adjusting both drive cables for
actuation of sunroof
Group 54 12.. of the repair manual
includes the following procedures
for sunroof service:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Replacing left or right rubber gaiters for glass slide/tilt sunroof
Removing and installing sunroof lid (steel)
Removing and installing glass sliding/tilting sunroof lid
Replacing seal fro glass sliding/tilting sunroof lid
Replacing seal for sunroof lid (steel)
R&R headliner for glass slide/tilt sunroof cover
R&R headliner (steel)
R&R water channel for glass sliding/tilting sunroof
R&R complete slide/tilt sunroof frame
R&R complete glass sliding/tilting sunroof
Replacing control rail for left/right glass slide/tilt sunroof
R&R wind deflector
R&R wind deflector for glass sliding/tilting roof
Replacing sliding/tilting sunroof frame
Replacing glass sliding/tilting sunroof frame
Sunroofs - 15
SUNROOF COMPONENTS BY MODEL
E38
Sunroofs - 16
E31 Frame Assembly
E31 Steel Panel/Headliner
Sunroofs - 17
E36
318ti California Roof
Sunroofs - 18
M coupe/Z3 2.8 coupe - Tilt Panel Only
E46/E39
Sunroofs - 19
DOUBLE PANEL SUNROOF (DSHD)
The Double Panel Sunroof is found on E34 Touring vehicles only, and was offered as an
option. Features include:
• Multiple positioning of both sunroof panels
• One touch control for both panels
• Anti-trap protection and convenience closing through Central Locking.
Possible panel positions are shown below:
Vent - Front Panel raised a the rear,
floating headliner slid rearward for cabin
venting.
Front Panel Open - Front panel can be
opened to approximately 450mm.
Rear Panel Open - Rear panel can be
opened to approximately 450mm.
Combined Panel Opening - Both
Panels can be opened together, to vary
the amount of opening front and rear, up
to a combined total of approximately
450mm.
Sunroofs - 20
FEATURES
One Touch: Sliding the switch forward or rearward momentarily will result in the appropriate panel being driven to it’s next end of travel. Pushing the switch upward momentarily
will result in the sunroof moving to the completely closed position non-stop. Any one touch
operation can be immediately stopped by touching the switch again.
NOTE: One touch operation will not work unless the Control Unit has been successfully initialized.
Anti-trap Protection: The anti-trap feature only works in the closing direction. Sunroof
movement will immediately stop and reverse itself when an obstruction is detected by the
Control Unit. In order to allow full sunroof panel closure, the anti-trap feature is deactivated 4mm before full panel closure is reached.
Note: The anti-trap feature will not work unless the Control Unit has been successfully
initialized. Remaining on the switch will override the anti-trap feature.
Convenience Closing. The Double Panel Sunroof and all Door Windows can be fully
closed by holding the door key in the full locking position after the doors have been locked.
Releasing the key before closing is completed will stop all convenience closing action.
Unloading during startup: The double panel sunroof motors receive their power from the
power protection relay. During engine starting, ZKE removes power from the power protection relay. The sunroof will not move during engine starting.
Failsafe. In the case of electrical faults, it is possible the Control Unit may only allow motor
operation in the closing direction. In the case of electrical failure, the sunroof can be manually closed using the hex tool found in the vehicle’s tool kit.
Diagnosis: The Control Unit is fully diagnosible using the DIS Tester or MoDiC.
Initialization: Initialization begins with a fully closed sunroof. It allows the Control Unit to
learn a starting point for all sunroof panel movement. Initialization is accomplished by placing both sunroof panels in the fully closed positions and along with the key on, holding the
switch in the closed position for approx. 5-10 seconds.
Sunroofs - 21
COMPONENTS
•
•
•
•
•
Two separate outer panels.
Two inside floating headliner panels.
Two drive motors (one for each panel) with two separate cable drives.
Single multi position control switch
Fully diagnosible sunroof module.
Sunroofs - 22
OPERATION
All Double Panel Sunroof operations are controlled from a single switch located in the headliner.
The switch is identical to single panel sunroofs of the E32/E34, Although it resembles the switch
used for single panel sunroofs, the DSHD control module interprets the signals differently:
• Beginning from a fully closed position, movement of the switch either forward or back
will result in raising the front panel to the vent position. (This is necessary before any
other panel movement can begin.)
• Once the front panel is in the vent position, moving the switch forward will move the rear
panel forward and moving the switch rearward will move the front panel rearward.
• For combined panel opening, the rear panel must be driven under the front panel (forward). Then the front and rear panels can be driven rearward together.
•
Closing - Regardless of roof panel position, the sunroof can always be closed by holding the center of the switch in the upward direction.
Sunroofs - 23
ADJUSTMENTS
The steel panels of the DSHD system are adjusted similarly to the steel panel of SHD systems. The E34 is not included in the Repair Manual of TIS. Refer to the Repair Manual
Micro fiche for all DSHD R&R and adjustment procedures.
PANEL HEIGHT MEASUREMENTS:
Front Panel:
• Front edge of panel = 1.5mm down
• Rear edge of panel = 1.5 mm up
Rear Panel:
• Front edge of panel = 1.5mm down
• Rear edge of panel = 1.5mm up
Sunroofs - 24
SUNROOF SPECIFIC SI BULLETINS
• E38 MOONROOF repair instructions. SIB 54 07 96.
• DOUBLE PANEL SUNROOF NOISES . SIB 54 01 96.
• 318ti LIMITED OPERATING SUNROOF TRAVEL. SIB 54 09 95.
• REVISED SUNROOF PANEL MOUNTING. SIB 54 08 96.
• E36 SUNROOF REPLACEMENT CASSETTE. SIB 54 03 95.
• E36 SUNROOF WIND DEFLECTOR RATTLES. SIB 54 01 94.
Sunroofs - 25