tailgate lock BMW 540i 2000 E39 Workshop Manual

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400 Body-General
........................ General ........................... .40 0.2 Roof paddin~ 400-7
Body Assembly ................... .40 0.2
Body dimensions (in inches)
............ .40 0.2
Bodyshell
........................... 400-3
Exterior and aerodynamics
............. .40 0.3
Sport Wagon ...................... .40 0.4
Tailgate
............................ .40 0.5
Tailgate lock system
.................. .40 0.5
Rear wiper system ................... .40 0.6
Antenna and sound system ............ .40 0.6
Safety and Security Features ....... .40 0.7
Safety cage
......................... .40 0.7
Door locks and door handles
........... .40 0.7
.
........................... Seat belts 400-7
Airbags ............................ 400-8
Battery safety terminal (BST)
........... 400-9
Security
............................ 400-9
Interior Features ................... 400-9
............................. Seats 400-10
Instruments and controls .............. 400-10
Central body electronics
.............. 400-1 1
Heating and Air
Conditioning (IHKA)
............... 400-12

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400-5
Body-General
Tailgate
The E39 Sporl Wagon tailgate is large with a low sill for easy
cargo loading. The tailgate opens to an angle of
88" mea-
sured from the rear roof pillar (D-pillar) and to a height of
2029
mm (79.8 in) measured from the ground to the upper edge of
the raised tailgate.
The rear window is bonded to a load bearing frame and can
be opened separately from the main tailgate. Tailgatesupport
gas springs are recessed into cavities in the roof.
Tailgate lock system
A mechanical tailgate lock cylinder is not used; the tailgate is
opened by the unlock pad above the license plate, the remote
tailgate switch located in the drivers kick panel, or via
FZV
(Iteyless entry) control.
4 An emergency release mechanism is incorporated into the
latch assembly to open the hatch from the vehicle interior if a
malfunction occurs.
The tailgate lock assembly includes an automatic soft close
(SCA) feature. The electrical operation of SCA is a function of
central body electronics
(ZKE Ill). The SCA actuator is locat-
ed in the rear cowl panel below the tailgate. The actuator is
controlled by a load relay in the General Module. A locking
cam is mounted on an eccentric that is driven by the actuator.
4 The SCA cam always turns in the same direction to open or
close the tailgate. The cam turns
180" to open or to close.
When the cam turns in the up direction the notch in the cam
SCA actuator pushes on a lever on the back of the latch in the tailgate. This
mechanically unlocks the latch. The tailgate is raised up and
can be opened.

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41 2-1 4
l~runk Lid, Tailgate
< Loosen left and right lateral guide to body fasteners (arrows)
until guide can be moved.
4 Loosen left and right tailgate lateral guide fasteners (arrow)
and fully retract guides.
Check fulcrum pads (arrows) on lower section of tailgate
lock for damage. Replace if necessary.

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Trunk Lid, ~ail~atel
4 Loosen lower tailgate lock fasteners (arrows) so that tailgate
lock can center itself.
CAUTION-
The lower section of tailgate lock must not scrape against
the upper section.
The eccentric pin on the lower section of the tailgate
loclc rotates
when being locked from upper section of
tailgate lock.
- Disconnect tailgate latch actuator motor by squeeze locking
tabs on electrical harness connector and disconnecting.
CAUTION-
Eccentric pin in lower section of trunk lid lock must be at
lower dead center.
After disconnecting plug connector from actuator mo-
tor, tailgate is opened by electric
unloclcing fixture of up-
per section of tailgate loclc.
. For this reason, the cable connections to the upper
section of the tailgate loclc must remain connected.
Othe~tise the tailgate can only be opened by the emer-
gency handle. Eccentric pin of lower section of tailgate
loclc remains at bottom dead center point after unlock-
ing.
Tailgate alignment, height adjustment
4 Loosen left and right tailgate hinge fasteners (arrows) to al-
low tailgate to be adjusted.
CAUTION-
. When the hinge screws for the tailgate are released, the
position of the overall assembly changes with respect to
the body.
The position of the rear window frame to the tailgate re-
mains unchanged.
- Close tailgate carefully and check gap dimensions. See Tail-
gate alignment specifications below.
- Tighten hinge screws when gap dimensions are correct.

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Trunk Lid, Tailgate
4 To periorm contact pattern test, coat lower latch areas A, 6
and C with grease.
Carefully close and reopen tailgate.
Check that upper section of tailgate lock does not scrape
against lower latch.
* Eccentric pin in lower section of tailgate loclc must not
scrape against upper section
(B) of tailgate lock.
The contact pattern (C) of upper section of tailgate lock on
eccentric pin should be centered.
- To adjust height of upper section of tailgate lock, loosen fas-
teners, move upper section of lock and retighten fasteners.
Repeat contact pattern test after height adjustment.
Tailgate lateral guide, adjusting
< If necessary, loosen lateral guide to body fasteners (arrows)
to allow it to move.
Move lateral guides to center position.
< Loosen lateral guide to tailgate fasteners to allow it to move.
- Close tailgate to center guides with respect to each other.
NOTE-
The bracket of the lateral guide continues to touch against
the body without clearance as does the lateral guide against
the tailgate.
- Open tailgate and tighten guide fasteners.

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41 2-21
Trunk Lid, ~ailaatel
Rear window, adjusting
NOTE- Three versions of rear window are used on
Sport Wagon
models.
Tailgate must be correctly adjusted before rear window ad-
justments are made.
- . . . . . .. .. 4 With tailgate closeo ano rear window open, oosen ninge fas-
teners (arrows) to allow ninge to move.
- LoosL'n fasteners n lower section of ock to al ow movement.
- Care& ly c ose rear window:
Ad.~st gap dmensions and poston of rear window relative
to Oody panel. See Tailgate alignment specifications. .
FA-UTION- I
On transition area between rooflailgate, tailgate must not ex-
tend above height of roof
othe~lise wind noise will be creat-
ed.
- If necessary, adjust height of rear window frame by inserting
spacers between the hinge and the frame.
- Carefully open rear window, taking care not to alter adjust-
ment.
Tighten left and right rear window fasteners.
Close rear window and check adjustment, repeat step if
necessary. See Tailgate alignment specifications.
Rear window locking pin, adjusting
NOTE-- Several versions of rear window
locldng pin are used on
Sport Wagon models.
1999 528i model is shown. Other
models are similar.
For rear window adjustment specifications,
seeTailgate
alignment specifications.
Loosen lower assembly fasteners (arrows)

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41 2-22
1 Trunk Lid, Tailgate
4 With rear window open, loosen loclc nut (A) so that inclination
of loclting pin
(B) can be adjusted.
- Carefully close rear window, while ensuring that locking pin
is centered in rotary latch in lower section.
NOTE-
When closing rear window, be sure that there is a gap of ap-
proximately
1 mm (0.04 in) between the locliing pin and the
rotary latch in the lower section of lock.
- Open tailgate and tighten lower loclc assembly fasteners. Be
careful not to alter inclination of loclting pin
(B) when tighten-
ing loclc nut
(A).
4 To adjust height of rear window at lock, loosen loclc nut (A)
and turn locking pin (B).
Be careful not alter position of loclting pin when tightening
lock nut
(A).
CA UTIOG
After adjusting rear window, always checlr position of wiper
axis relative to drive disc and limit stop on rear window wiper
motor. Adjust if necessary See 611 Wipers and Washers.

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51 5 Central Locking and Anti-Theft
........................... General .51 5.2
Central Locking ................... .51 5.2
General Module
..................... .51 5.2
Central locking inputs and outputs
....... .51 5.3
Doorlocks
........................... 515-5
Trunklock
........................... 515-7
Remote entry (FZV)
.................. .51 5.7
Remote entry (FZV) inputs and outputs ... .51 5.8
Car Memory I Key Memory ............ .51 5.12
Trunk lid soft close (SCA)
............. .51 5.13
SCA subsystem
.................... .51 5.14
........ Tailgate and rear window locks
.51 5.14
Sport Wagon tailgate and rear
window
lock schematic ............... .51 5.15
Door Handles and Locks .......... .51 5.16
Door handle (outer), removing
and installing
....................... .51 5.16
Door latch, removing and installing
..... .51 5.17
Outer door lock cylinder, removing
and installing
....................... .51 5.18
Trunk Lock Assembly ............. 515-1 9
Trunk lock. removing and installing
...... 515-19
Trunk lock striker plate. removing
and installing
....................... 515-20
Tailgate lock. emergency release
....... 515-21
... Electronic Immobilization (EWS) 515-21
EWS variations
..................... 515-22
......... EWS control module. replacing 515-23
Transmitter
1 receiver module .......... 515-23
....................... Ring antenna 515-23
Anti-theft System (DWA) ........... 51 5-24
DWA LED Status
.................... 51 5-24
Tilt sensor
......................... 515-24
Interior protection .................... 51 5-25
Glass breakage sensors
.............. 515-26
Emergency disarming
................ 51 5-26

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51 5-2
/Central Locking and Anti-Theft
This section covers repair information for door, trunk and car-
go compartment locks, central locking, electronic
immob~liza-
tion (EWS) and anti-theft alarm (DWA).
€39 cars are equipped with sophisticated self-diagnostic elec-
trical systems. When experiencing malfunctions relating to
central locking. EWS or anti-theft systems, start the diagnosis
process using the
BMW service tester DIS, GT 1, MoDiC or
equivalent scan tool. An advanced diagnostic scan tool can
usually pinpoint electrical faults quickly and safely.
Additional electrical information can be found in:
610 Electrical Component Locations
ELE Electrical Wiring Diagrams
Central locking in E39 vehicles controls the door
locks, trunk
or tailgate lock and fuel filler flap lock. The control module for
the Central Body Electronics system (ZKE
Ill), lknown as the
General Module (GM
Ill), controls central locking.
ZKE
Ill manages the following central locking related func-
tions:
Central locking
* Keyless entry
Key memory
Power trunk release
Electric opening of tailgate
DWA alarm system
Diagnosis
General Module
4 The General Module (GM) (arrow) is responsible for the op-
eration of central body electronics. The GM is located behind
the glove compartment.
Based on input information, the GM uses internal transistors
to switch current flow (providing voltage or ground) through
circuits and actuators. Actuators are the final controlling de-
vices used by GM to operate or control various output func-
tions such as relays and motors.
The accompanying schematic, Central locking inputs and
outputs, illustrates the GM central locking system.

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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.