• A remote luggage compartment button is installed in the left kick panel (center console
in the E53) to open the luggage compartment from inside the vehicle.
• The EWS is interfaced for double lock monitoring and unlock function. With the presence
of an accepted EWS key in the ignition, the vehicle will be unlocked and disarm DWA.
• The automatic locking feature (> 99 MY) activates the door locks when a road speed
signal of 5 MPH and engine RPM is detected via the K-Bus. The factory default setting
of this feature is off (can be encoded on for individual users with Key Memory function).
• In the event of an accident (ignition on), the GM will be signalled to unlock all doors.
Hardware Features:
• The external lock cylinders are located in the
driver’s door and luggage compartment lid
(E53/E39 Sport Wagon does not have a tail-
gate lock cylinder).
• The driver’s door and luggage compartment
incorporates an overrunning lock cylinder. The
lock cylinder will free wheel or spin If any key
other than the vehicle key or tool, such as a
screw driver, is inserted into the cylinder. The
lock cylinders can be manually locked/un-
locked by turning the key “past” lock/unlock.
• The door lock buttons are mechanically uncoupled from the
lock actuators when locked.
The door lock buttons “mechanically” lock the individual
doors. This provides manual locking in the event of a central
locking malfunction.
• Child safety locks (located in
the rear doors) are actuated
by inserting a key in the slot on
the door latch or by sliding a
lever (dependent on model).
The door can now only be
opened from outside.
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Central Body Electronics ZKE III
Door
Button
Lock
12520117.eps
12520119.eps
12510121.eps
12520120.eps
Rear Window Child Lockout Switch: The rear window child lockout switch is incorpo-
rated in the driver's side window switch block. It provides a constant ground signal to the
GM preventing the windows from being operated from the rear door switches.
The lockout switch ground signal is overridden by the GM if the MRS crash signal is acti-
vated (MRS III equipped vehicles).
Window Anti-Trap Detection: Each pressure guard at the top edge of each door frame
consists of two contact strips that close when subjected to pressure. This provides anti-
trap for the full travel of the window.
When the contact strips close, the window will reverse direction. The contact strip does not
require that the anti-trap feature be initialized prior to operation.
The finger guard has a resistance of 1.2 KOhm and it is monitored for open circuits. Faults
with the anti-trap system require that the window switch be held to close the window.
The example shown represents the driver’s door window control and monitoring carried out
by the Driver’s Door Switchblock Module (PM- FT/ SB).
The passenger door window is controlled and monitored by the Passenger door module
(PM-BT) and the rear door windows are both controlled and monitored by the General
Module.
44
Central Body Electronics ZKE III
