Trunklid/Tailgate

Trunk Lid Close (E38 SCA)/Tailgate and Window Latching System (E39/E53)







The tailgate/trunk lid is opened by any of the three input signals: FZV, remote button and unlock switch pad (push - trunk lock cylinder E38).

These inputs request the rear latch actuator control circuit to be switched to ground (exception: presence of road speed signal, key on with FZV request.)

The rear latch actuator unlatches the mechanism and signals the GM of the open latch status. The SCA motor rotates the striker 180°. Feed-back signalling stops the motor. E38 - When closing the trunk lid the trunk latch microswitch signals the GM to activate the SCA motor to pull the lid down.

Rear window unlatching is requested by the rear window switch ground signal. This signal initiates activation of the rear window actuator relay control circuit which activates the rear window actuator. The actuator unlatches the mechanism opening the window. The latch simultaneously provides an open window signal for the rear window wiper motor module as well as an interior light on request (via the wiper module).