Remote Control Function for Comfort Access

When the unlocking or locking button on the ID transmitter is pressed, it emits an encrypted remote control signal. The antenna in the rear window forwards the remote control signal to the diversity module. The diversity-module remote control receiver demodulates, processes and then sends the signal to the Car Access System on the LIN bus.

If the vehicle is in sleep mode, the remote control receiver wakes the Car Access System to reduced consumption mode via the LIN bus. The Car Access System thus receives the request that was sent using the ID transmitter. The ID transmitter is checked by the remote control receiver at this stage. If the result of the check is positive, the remote control receiver forwards the request via the LIN bus. If the request is authenticated, the Car Access System wakes the vehicle and initiates the unlocking or locking of the vehicle. To do so, the Car Access System issues the release signal for the junction box electronics to actuate the central-locking drive.

The ID transmitter can also be used to open the trunk separately. For this, only the button with the open trunk symbol need be pressed.

The Car Access System is responsible for communication via the LIN bus. The diversity module therefore only forwards the LIN bus signal if prompted to do so by the Car Access System 4. This applies to a vehicle that is not in sleep mode.