1999 BMW 540i trunk release

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51 5-4
I Central Locking and Anti-Theft
Driver's door lock
The
lock/unlock signals are sent as input to the door module
from two microswitches on the lockcylinder. The driver's door
module carries out the locking
/ unlocking functions of the
driver's door through its final stage control.
The signal to lock the remaining doors, trunk or tailgate and
fuel flap is sent over the P-Bus to the GM and the passenger
door module. Activation of the passengers door
loclt is carried
out by the passenger door module. The rear doors, trunlt or
tailgate and fuel flap are
locked by the f~nal stage in the GM.
When
locked from the outside, all doors are set to the double
lock position and the GM will not carry out any unlock com-
mands from the central
loclc button or remote trunk release
button.
Selective unlocking
When unlocking with the key or the remote transmitter, the
first unloclcrequestwill only unlock the driver'sdoor. A second
unlock request will unlock the remaining doors, trunk or tail-
gate and fuel flap.
Trunk locking
I
The vehicle can be locked/unlocked from the trunlc loclc cylin-
der. The GM locks the trunk or tailgate, rear doors and fuel fill-
er. The locking command is passed over the P-Bus to the
respective door modules to lock the driver's and passengers
doors.
Locking the trunk and removing the key in the
hor~zontal posi-
tion will set the valet lock and prevent opening of the trunlt
with the central locking system.
Central locking switch
-
< The central locking master control switch (arrow) is located
in the center console behind the shifter.
The central locking button will only single
loclt the doors
and trunk. The filler flap remains unloclted for refueling pur-
poses.
If a door is opened from inside while centrally locked, the
remaining doors remain locked.
The open door can be relocked, when closed, by manually
locking or pressing the central locking button twice. This
synchronizes the door
locks.

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Central Locking and Anti-Theft
Trunk lock
6 Tr~nk ftey pos~rions for eecir'cal mama, locking and
-nlock~ng are:
1. Manual unock .. - - - ........ - ..- .- ................. s.=.=-- 2. Unlock. DWA oisarmed, conven:ence open
(nold
un1:l aclivaledj
3. Ne~tral posit'on
1. -ocn. DWA armeo, Convenience closng
(hold ~nti activated)
5. Valet .oc,t position
. -- .............-... .- . - -.....
Key memory
< The remote trunk button (arrow) is located in the lefl lticlc
panel.
- The trunk can be opened from this remote release when the
doors are locked from the central locking button. The
trunk
remote button is disabled when the trunkis loclted in the valet
position or when a speed signal of
4 mph is present at the
GM.
Remote entry (FZV)
< The €39 remote (keyless) entry system (FZV) uses a tiny ra-
dio transmitter in the vehicle key to
lock and unlock the doors
and the trunk by remote control. There are a number of other
features incorporated in FZV:
Locltinglunloclting of fuel filler lid
Selective unlocking of driver's door (as with key in lock)
Armingldisarming of DWA alarm system
Remote unlocking of
trunk lid or tailgate
Comfort opening of windows and sunroof
* Interior lighting activation
Panic mode alarm activation
* Models to 1999: Key incorporates LED. LED informs oper-
ator that an FZV signal is being transmitted. LED is also
useful indicator of key initialization status and lkey self-test.
Keys delivered with four different colored labels. This is
helpful to differentiate FZV keys during initialization,
pre.
venting possibility of misassigning key ID which would
change coded Key Memory functions.

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SCA subsystem
1. Battery power (term. 30)
2. Battery power (term. 30)
3. SCA actuator
4. Ground (term. 31)
5. Feedback OPEN
6. Ground (term. 31)
7. General Module (GM)
8. Trunk contact switch
9. Trunk opening switch
502515990
SCA operation
Three microswitches are used to operate trunk latching sys-
tem.
Microswitch mounted on lock cylinder. Pushing lock cylin-
der in will signal GM to activate actuator and open trunk.
Q Microswitch in actuator signals GM when trunlc has re-
leased. Actuator shuts off.
When closing trunk, third microswitch (on trunk latch) sig-
nals GM to activate actuator. Cam turns to pull lid closed.
Foroverload protection,
ON duration of actuator is limited to a
max.
5 seconds.
Emergency opening of trunk is provided by a mechanical link
from the lockcylinder.
If the trunlc has been opened by the
emergency release, it can be
reclosed as a conventional lid
with normal pressure.
Tailgate and rear window locks
The Sport Wagon tailgate can be opened from:
0 Remote lkey (FZV)
Interior tailgate release button at driver's lkick panel
Unlock microswitch above rear license plate

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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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WARNING
Your common sense, good
judgement, and general alertness are
crucial to saie and
successiul sewice
work. Beiore attempting any work on
your BMW be sure to read 001
General Warnings and Cautions
and the copyright page
a1 the iront of
the manual. Review tliese warnings
and cautions each time you prepare
to work on your
BMW. Please also
read any warnings and
cautions that
accompany the procedures in the
manual.
Towing 010-20
Traction control
see Brakes, ABS, ASC or DSC
system
Traction strut
see Rear suspension, suspension
arms
Transmission fluid
200-4
see Maintenance
see also Automatic transmission
see also Manuai transmission
Transmission
fluid heat exchanger
see Cooling system
Transmission input shaft oil seat
see Manual transmission
Transmission lubricant
200-4 see also Automatic transmission
see also Manual
lransmission
Transmission output shafl oil seal
see Manual transmission
Transmission pilot bearing
replacing 210-16
Transmission service see Manual transmission, oil seals
Trim, interior
see interior trim
see also Steering, steering column
trim
Trunk lid
412-2 soft close (SCA) 515-13
see also Trunkltailgale loci(
see also Central iocl TrunWtailgate lock
tailgate loci( emergency release
400-5, 515-21 tailgatelrear window locl(ing 515-14
trunk lock 51 5-1 9
lrey positions 515-7
Turn signai assembly
see Switches
see also Lights
UIS see Interior protection
U-joint
see Driveshaft
Upholstery see Maintenance, leather upholstery
and trim Vacuum
booster
see Brakes
Valve guides
see Cylinder
head and valvetrain
Valve seals
see Cylinder head and valvetrain
Valve seats
see Cylinder head and valvetrain
Valves see Cylinder head and
vaivelrain
Valvetrain see Cylinder head and valvetrain
VANOS control unit,
removinglinstalling
M52 engine 117-14
M52 TU i M54 engine 117-36 double VANOS
function
117-34 timing chain service 113-46. 116-28
timing, adjusting
M52 engine 117-22
M52 TU l M54 engine 117-43
Vehicle identification number (VIN)
010-12
Ventilation microfilter
see
AIC
see also Maintenance
Viscous clutch see Cooling
system, cooling tan
Voitage and polarity
600-5
Voltage tests
see Electrical system, troubleshooting