Electrical Child-Proof Lock (Option)
The electrical child-proof locking function involves an additional lock motor in each rear lock unit. The lock motor disengages the inner door handle on each rear door so that the door cannot be opened from the inside. The central electronic module (CEM) also deactivates the rear electrical window lift mechanisms while the function is activated. This function is activated using a switch on the control panel in the driver's door. The control panel is serially connected via LIN to the driver door module (DDM). The switch has an alternating function which engages or disengages the function every other time the switch is pressed. The activation switch has a built-in LED to indicate activated function.
The central electronic module (CEM) receives information from the rear door control modules, via the front door control modules, that the lock motors have reached their locked position. The position of the lock motors using a contact breaker in the lock unit. The function for child-proof locks can be activated or deactivated in all ignition positions and up to 1 minute after the remote key has been removed from the starter module. During deactivation, the inner door handles are re-engaged and the rear power window lift mechanisms are activated. The LED in the switch goes out and the driver information module (DIM) displays a message indicating that the function had been deactivated.
A diagnostic trouble code (DTC) is stored in the central electronic module (CEM) if the indication from the lock motors is incorrect or missing, or if deactivation or activation fails. A message is also shown in the driver information module (DIM).