window BMW 540i 1998 E39 Owner's Guide

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51 2-4
I Door Windows
/ Anti-trap strip
Power window motors
The window motors are mounted on cable regulators. The
window motor control circuit consists of two wires for operat-
ing the motor in both directions.
The motors are activated by relays in the GM
Ill. The relays
provide either power or ground depending on the direction of
window travel. The GM
Ill controls the polarity based on a re-
quest to run the window from a window switch or a conve-
nience
openinglclosing signal.
Convenience openinglclosing
The GM Iii provides the convenience openlclose feature, pro-
viding control of the power windows (and sunroof) from out-
side the vehicle with the key in the driver's door lock. The FZV
(remote key) provides the same function for window opening
only.
Anti-trap protection is active during convenience closing from
the driver's door lock.
If the GM receives a request to operate convenience closing
or opening for more than
110 seconds, the function is deacti-
vated and a
fault code is stored.
Window anti-trap protection
4 A rubber pressure guard is located at the top edge of each
door frame. It consists of two contact strips that close when
subjected to pressure. When the contact strip closes (for ex-
ample, a hand is trapped between the top of the window and
the door frame), an anti-trap signal is sent to the GM
Ill. The
window immediately (within
10 milliseconds) reverses direc-
tion. This feature does not require
initialization.
The E39 pressure sensor finger guard has a resistance of 3
Kw and it is monitored for open circuits. When pressed, the
monitored resistance changes to
< 1 Kw. if anti-trap protection
becomes faulty the one touch window closing will not func-
tion.
Window anti-trap protection is
only active in the one touch
and convenience close modes of operation. If the window
switch is pulled and held, anti-trap protection will not function.
The anti-trap contact strip has a resistance of
1.2 K Ohm and
it is monitored for open circuits. Faults with the anti-trap sys-
tem will cancel the one touch feature requiring the window
switch be held to close the window.

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Door windows1
Window motor limit stop function
If repeated window activation (upldown cycles) exceeds one
minute, the
GM Ill deactivates the internal relays and disre-
gards any further
upldown requests. The GM Ill provides mo-
tor activation after a short duration but not for the full one
minute monitoring cycle.
The
GM Ill monitors the number of times a window motor is
activated. It counts each cycle and stores the number in
memory. Afler the stop function limit is reached and the win-
dow motor is deactivated, the
GM Ill slowly reverses the
stored count of activation until the stored number equals
0,
thus allowing the window motor to cool down.
WARNING-
* Always wear hand and eye protection when working with
brolen glass.
If a window is brolen, all of the glass bits should be
vacuumed out of the door cavity. Use a blunt
so-ewdi-iv-
er to clean out any remaining glass pieces from the
window guide rails.
When servicing the door windows, the harness con-
nector to the window regulator should always be dis-
connected to prevent pinching fingers in the moving
window mechanism.
Sedan and Sport Wagon doors are similar. Use the following
procedures for window service on these models.
WARNING-
E39 cars are iitted with side-impact airbags in the front
doors. Some are equipped with
airbags in the rear doors
as well. When
servicing the door windows on cars with
side-impact airbags, always disconnect the negative
(-)
battery cable. See 721 Airbag System (SRS) for cau-
tions and procedures relating to the
airbag system.
* Prior to disconnecting the battery, read the battery dis-
connection cautionsgiven
001 General Warnings and
Cautions.

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Door Windows
Window anti-trap strip, testing
- To test function of anti-trap strip on any window:
With key
ON and window down, pull up window switch to
second detent, thus activating one-touch close operation.
Insert wooden block or other soft object between glass
and upper door frame.
Window should contact block, then immediately reverse
direction and lower by approximately
25 mm (1 in).
NOTE-
Anti-trap strip is integrated into the molding strip of the door
window frame.
Front window anti-trap strip, removing
- Remove front door panel and vapor barrier as described in
411 Doors.
< Remove window frame mold~ng strlp and peel toward inside
7 of vehrcle.
Separate anti-trap electrical harness connector
top front of door.
NOTE-
Wire color for anti-trap strip is dark gray.
(arrow) at

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Door Windows
molding and
anti-trap strip
4 If replacing molding with new one, transfer mounting clips
and foam insulation as necessary.
1. Window frame molding
2. Clip
3. Door corner speaker cover
4. Foam insulation
- After installation, recheck anti-trap protection.
Rear window anti-trap strip, removing
- Remove rear door panel and vapor barrier as described in
411 Doors.
4 Remove window frame molding strip, peeling it off fixed win-
dow partition
(arrows). Do not tear strip in area (A).
Disconnect electrical harness connector (arrow).
After installation, recheck anti-trap protection.

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51 2-8
Door Windows
Door window, adjusting
Whenever the door window or window regulator is removed,
window adjustment should be checked. The glass should
contact the top of the window squarely and should seat
against the window seal uniformly.
NOTE-
If the window does not contact the window seal uniformly,
wind noise or water infiltration may result.
- Remove door panel as described in 411 Doors.
- Disconnect negative (-) cable from battery. Remove airbag
unit and vapor barrier from door. See 721 Airbag System
(SRS).
WARNING-
Prior to disconnecting the batteg read the battery discon-
nection cautions given in
001 General Warnings and
Cautions.
Longitudinal adjustment
- Adjustments are made with window in open position.
Loosen window guide rail mounting nuts (arrows), but do not
remove.
Slide window glass in longitudinal direction to adjust
Tighten guide rail nuts.
Tightening torque
Window regulator guide rail to door
10 Nrn (89 in-ib)

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512-9
Door Windows
Vertical adjustment
- Adjustments are made with window in open position
4 Loosen window clamping fasteners (arrows), but do not
remove.
Adjust rear clamp and tighten fastener.
Tighten front clamp fastener.
4 Raise door window up to stop:
Check gap (A) at window front edge,
Checlc gap (5) at window top edge.
NOJE-
Measure window frame between door window edge and
panel.
Front window gap settings
Front of window
(A) 5.4 mm (0.21 in)
Top of window
(6) 10 mm (0.39 in)
Tightening torque Window regulator guide
rail to door 10 Nm (89 in-lb)
Door window, removing and installing
- Remove door panel as described in 411 Doors
- Reconnect window switch and lower window down to conve-
nient height and disconnect window switch.
- Disconnect negative (-) cable from battery, then remove air-
bag unit and vapor barrier from door. See 721 Airbag Sys-
tem (SRS).
WARNING -
Prior to disconnecting the battery, read the battery discon-
nection cautions given
in 001 General Warnings and
Cautions.

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Door Windows
Worlting carefully with a plastic prying tool, remove window
trim strip from door.
Starting from rear of inner window trim strip, carefully
on trim strip clips
(arrows) to remove window trim.
< Loosen 1 clamping jaw ' fasteners (arrows)

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Door Windows
Tilt window glass carefully inside door cavity and lift out of
door.
Installation is reverse of removal.
Replace plastic window retainers once glass is inside door.
Use new mounting bolts when reinstalling side-impact
air-
bag to door.
Adjust window as described earlier,
Sedan and Sport Wagon doors are similar. There are two win-
dow rails in each front window regulator, only one in the rear.
Otherwise the front and rear regulators are similar.
WARNING-
E39 cars are Wed with side-impact airbags in the front
doors. Some are equipped with
airbags in the rear doors
as well. When servicing the door windows on cars with
side-impact airbags, always disconnect the negative
(-)
battery cable. See 721 Airbag System (SRS) for cau-
tions and procedures relating to the
airbag system.
Prior to disconnecting the battery, read the battery dis-
connection cautions given at the front
001 General
Warnings and Cautions.
NOTE-
Because window operation is electronically controlled, a win-
dow motor does not have mechanical endpositions. For this
reason it can be removed and installed with the window in
any position and does not need reinitialization.
Front window regulator removing and
installing
NOTE-
BMW recommends removing the window regulator and mo-
tor as one unit, then separating the two on the bench.
- Remove front door panel as described in 411 Doors.
- Disconnect negative (-) cable from battery, then remove air-
bag unit and vapor barrier from door. See 721 Airbag Sys-
tem (SRS).

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512-12
I Door Windows
- Disconnect window from window guide rail as described in
Door window, removing
and installing. Do not remove
window from door.
* Push window up and use wedge to hold in position.
- If necessary, remove speaker unit from door.
- Removing window regulator from door:
Disconnect window motor electrical harness connector.
4 Remove lower window regulator fasteners (arrows).
Remove window regulator fasteners (arrows)
Loosen fasteners (arrows) and slide regulator up to remove
from mounts.
- Remove window regulatorthrough opening in bottom of door,
checking for any wiring that might become snagged during
removal.
- Installation is reverse of removal.
Be sure to route wiring harnesses to keep them away from
moving window mechanism. Use new wire ties as neces-
sary.
-
Tightening torques -
Window motor to regulator 5 Nm (44 in-lb)
502512211
Window regulator to door 8 Nm (71 in-lb)
Adjust window
as described earlier.
- -
W~ndow to guide 8 Nm (71 in-lb)
--

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Door windows1
Rear window regulator, removing and
installing
NOTE-
BMW recommends removing the window regulator and mo-
tor as one unit, then separating the
two on the bench.
- Disconnect negative (-) cable from battery
- Remove door panel as described in 411 Doors
- Remove airbag unit and vapor barrier from door. See 721
Airbag System (SRS).
- Disconnect window from window guide rail as described in
Door window, removing and installing. Do not remove
window from door.
Push window up and use wedge to
hold in position.
Loosen fastener (arrow) and slide window regulator up and
out of mount.
Disconnect wiring harness connector (A) and remove fasten-
ers
(6).
Remove window regulator and motor through opening in
door.
- Installation is the reverse of removal.
Be sure to route wiring harnesses to keep them away from
moving window mechanism. Use new wire ties as neces-
sary.
Tightening torques
Window motor to regulator
5 Nrn (44 in-ib)
Window regulator to door
Window to guide
8 Nrn (71 in-lb)
8 Nrn (71 in-lb)