Power Trunk / Liftgate Lock Switch: Description and Operation

210 Chassis shown

The remote trunk release (RTR) provides remote opening of the trunk lid. This function can be initiated via a switch in the interior or by pressing the button on the IR transmiffer for remote central locking (RCL) twice within 1 second. After activating the remote trunk release, the vehicle is centrally unlocked and subsequently the latch is actuated by a vacuum element. The trunk lid opens.

An opened trunk lid is indicated by an LED integrated into the remote trunk release switch.

Unintended actuation while driving is prevented via the recognition of the speed signal. The speed signal (above 3mph or 5km/h) is present at the combination control module (N10-1) and is transmitted from there via the CAN data bus to the PSE control module.

In order to ensure protection against theft, the opening of the trunk lid via the interior RTR switch is not possible if the vehicle has been locked from outside, the vehicle with the IR transmitter, or mechanical key.

System Networking Diagram:

Activation
When activated, the trunk lid release switch (S15) or the RCL control module (N54) transmit a signal to the combination control module (N10-1). This transmits the signal "open trunk lid" to the PSE control module via the CAN data bus. After that, the PSE control module supplies pressure and simultaneously activates the trunk lid release control valve (Y65/3). The remote trunk lid release pneumatic element actuates the latch by means of pressure and the trunk lid opens.

Note: Pneumatic or electrical faults of the RTR system are recognized by the PSE control module and are stored in the DTC memory. The DTC memory can be read and erased only with the HHT.