1999 BMW 540i door

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51 5-1 6
Central Locking and Anti-Theft
DOOR HANDLES AND LOCKS
In the procedures that follow, door handle removal, door lock
cylinder removal and door latch removal are covered for the
left front door. Other doors are similar although simpler, due
to the
lack of lock cylinder.
Inside door release removal is covered in the procedure for
inner door
ane el removal. See 411 Doors.
Door handle (outer), removing and
installing
NOTE-
IfBMWspecial tools 51 3201 and51 3 203 are available, the
door handle can be removed without removing the door trim
panel or door
airbag. Use the access hole behind the rubber
sealing plug on the door edge.
- Close window on front door.
- Disconnect battery negative (-) cable.
CAUTlOG
Prior to disconnecting the batter)! read the battery discon-
nection cautions given
in 001 General Warnings and Cau-
tions.
Remove front door trim panel. See 411 Doors.
Remove door-mounted air bag. See 721
Airbag System
(SRS).
Remove rubber sealing plug (arrow) from door edge
NOTE-
In the photo below, door handle and lock cylinder carrier are
shown on the work bench for clarity.
Working inside door cavity:
- Use long thin screwdriver to release locking tab A. Push
screwdriver through hole for rubber sealing plug.
Slide locking plate
B toward front of door.
Working on outside of door, lift out lower edge of handle and
pull down to remove.
Installation is reverse of removal,
Tightening torques
Airbag to door (replace screws) 8.5 Nrn (75 in-lb)

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Central Locking and ~nti-~heel
Door latch, removing and installing
- Close window on subject door and open all other windows.
- Disconnect battery negative (-) cable
CAUTION-
Prior to disconnecting the batterl: read the battery discon-
nection cautions given in
001 General Warnings and Cau-
tions.
- Remove door trim panel. See 411 Doors.
- Remove air bag. See 721 Airbag System (SRS).
- Remove outer door handle. See Door handle (outer), re-
moving and installing.
< Working inside door cavity, release loclting tabs (arrows)
and open protective cover.
Pull down on electrical harness connector (arrow) to re-
lease.
< Working inside door cavity, next to outside door sltin:
Disconnect door lock cylinder Bowden cable from latch as-
sembly arm
(A) and support (B).
Disconnect microswitch connector (arrow).

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51 5-1 8
I Central Locking and Anti-Theft
< Working at outer door edge:
Disconnect inside door release
Bowden cable guide by
sliding mounting clip (A) forward.
Remove latch mounting fasteners
(B) and (C) and remove
latch.
NOTE-
In the photo below, door handle assembly and latch assem-
bly are shown removed from the car
for clarity.
Installation: Slide latch into position in door making sure that
cross-shaped tip of door
loclc cylinder mechanism fits cor-
rectly into corresponding opening in latch mechanism (in-
set).
Remainder of installation is reverse of removal. Operate
loclc
using key before installing door trim panel.
Tightening torques
Airbag to door (replace screws) 8.5 Nm (75 in-lb)
Outer door lock cylinder, removing and
installing
- Close window on subject door. Open all other windows
- Disconnect battery negative (-) cable.
CA UTIOIG
Prior to disconnecting the baffeg read the battery discon-
nection cautions given in
001 General Warnings and Cau-
tions.
- Remove door trim panel. See 411 Doors.
- Remove door air bag. See 721 Airbag System (SRS).
- Remove outer door handle. See Door handle (outer), re-
moving and installing.
- Remove door latch. See Door latch, removing and install-
ing.

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Central Locking and Anti-Theft
4 Remove lock cylinder carrier mounting screws (arrows).
- Working inside door cavity, turn cylinder carrier assembly
counterclockwise and carefully pull down to remove.
- Installation: Place lock cylinder carrier in position in door. In-
stall and tighten mounting screws.
- Remainder of installation is reverse of removal.
Tightening torques
Airbag to door (replace screws) 8.5 Nm (75 in-lb)
Trunk lock, removing and installing
< Remove plastic trim panel:
- Remove screw cap and screw (A).
Remove expansion rivets (B).
* Gently pry out mount clips (C).
4 To remove trunk lock:
Disconnect electrical harness
(A).
* Snap actuator rod out of mounting clip (B).
Remove fasteners (C) and remove lock assembly.
- Installation is reverse of removal
Trunk latch, removing and installing
4 Remove plastic trim panel:
Remove screw cap and screw
(A).
Remove expansion rivets (B).
Gently pry out mount clips (C).

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51 5-21
Central Locking and Anti-Theft
Trunk lid gap
measurements 4 When installing, or adjusting trunk lid alignment, adjust posi-
tion of trunk
loclc striker with mounting bolts finger tight.
* Check trunk lid loclc operation with lid open.
Adjust trunk lid alignment. See
412 Trunk Lid, Tailgate for
lid adjustment specifications.
NOTE-
Do not lubricate lock or lock striker with grease.
Tailgate lock, emergency release
4 In case of electrical failure, there is an emergency tailgate
loclk release. The release is located in the tailgate behind the
tool door.
- With tool door open, remove access cover and pull to the
right to release tailgate.
ELECTRONIC ~MMOBILIZATION (EWS)
E39 cars are equipped with a passive theft-prevention sys-
tem. The Electronic Immobilization System (EWS) makes it
impossible to
startthe engine using any means other than the
special lkeys furnished with the vehicle.
NOTE-
Replacement EWS control modules or DME control modules
must be electronically aligned to each before the vehicle will
start. This requires the use of the BMW Service Tester
(DIS-
plus, GT1, or MoDiC). Without alignment, the engine will not
crank (for example: swapping a
known good DME control
module into another vehicle for test purposes will result in a
no crank situation).
In the EWS system, the ignition key is embedded with
acom-
puter chip (EEPROM) and coded. The key communicates
with the vehicle using a transponder in the lkey and a ring an-
tenna surrounding the steering lock cylinder. Up to
6 replace-
ment keys are permissible. Only an authorized
BMW dealer
can provide replacement keys.

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51 5-24
l~entral Locking and Anti-Theft
ANTI-THEFT SYSTEM (DWA)
When the anti-then system (DWA) is armed, the doors, hood,
windows, trunk lid or tailgate are monitored against forcible
entry by switches and sensors. The vehicle is protected
against being jacked up or towed away by a tilt sensor.
The control electronics for DWA are integrated in the General
Module (GM). In addition to the control electronics, the sys-
tem includes the following components.
* DWA horn
DWA LED indicator
- Tilt sensor
- Monitoring switches and sensors
The system can be armed or disarmed from the driver's door
lock,
trunklid lock, tailgate lockorthe remote transmitter (FZV
Itey). When armed, the alarm horn
soundsfor30seconds and
the low beam headlights and turn signals flash for
5 minutes.
The electronic immobilizer (EWS) is also activated when
DWA is activated.
The alarm is switched off immediately if key is inserted in door
loclt or FZV key button is used.
DWA LED Status
The DWA status LED is located in the rear view mirror (ar-
row). When DWA is armed, the LED flashes slowly to indi-
cate armed status.
The LED and exterior lights flash once and the alarm horn
sounds when the system is successfully armed ordisarmed.
The LED will continue to flash slowly denoting the armed sta-
tus. If any monitored input is not closed when the system is
armed, the LED will flash rapidly for
10 seconds to indicate
the fault.
Tilt sensor
-
4 The tilt sensor, located on the left side of trunlt or cargo com- -
partment, consists of a conductive liquid chamber, a proces-
sor board and metal probes. The probes are submersed in
the liquid and produce a resistance value dependent on the
tilt of the sensor (angle of the vehicle). This resistance be-
comes the reference value when the DWA system is armed.
.-

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51 5-26
Central Locking and Anti-Theft
Interior sensor UIS (2000 and later models)
The
UIS system uses ultrasonic sound waves instead of elec-
tromagnetic waves. Ultrasonic sound waves are less suscep-
tible to magnetic interference.
Every time the DWA system is armed, the sensor adapts to
whatever objects might be stationary in the interior. The sen-
sor emits ultrasonic waves in a programmed timed cycle. It re-
ceives echoes of the emitted waves. The
UIS amplifies the
received sound wave signals and compares them to the ech-
oes of the transmitted waves. The
UIS also checits the incom-
ing echoes for background hiss (wind noise through a
partially open window) and adapts for this.
If the echoes are consistently similar, no movement is de-
tected.
If the echoes are altered, (inconsistent), the UIS deter-
mines motion in the interior compartment.
If motion is detected, the
UIS changes to a constant cycle
and the echo is compared again.
If the inconsistency is still present the
UIS sends the acti-
vate siren signal to the GM.
Glass breakage sensors
The doorwindows are monitored by inductive sensors mount-
ed on the inside of the door behind the trim panel. A closed
window is recognized by a magnetic plate
on the glass lining
up with the sensor. If the glass is broken, the plate falls away
and the signal from the sensor changes. This causes the GM
to activate the alarm.
Emergency disarming
- An emergency procedure is provided to cancel the DWA in
the event that a fault occurs within the system. The procedure
is as follows:
Driver's door mechanically
unloclted and open within 30
seconds. This will cause triggering of alarm.
All doors closed.
Ignition switch turned to
KL R (ACCESSORY). LED indica-
tor will come on.
- After 10 minutes, alarm is disarmed

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ZKE seat/mirror/steering
column memory
operational diagram
1. General module Ill
2. Steering column adjustment
switch
3. Seat memory module with
adjustment switches
4. Headrest motor
5. Backrest motor
6. Seat base tilt angle motor
7. Seat base up - down motor
8. Seat forward - back motor
9. Steering column length motor
10. Steering column tilt motor
11. Driver's (left) door module
12. Memory switch