Functional Description

Functional Description

The locking units located in the doors (door lock) have an electric motor.

The motor locks the door and also takes care of the "Safe" condition, i.e. after locking at an external lock (door lock, tailgate, radio remote control) the vehicle is protected against theft and can no longer be unlocked from the interior. The feedback on the respective condition in control module occurs via the contact switch in the locking unit.

All the known convenience functions can be performed with the electric convenience system, interior lights control, ATA with interior monitoring, electric windows, mirror and the radio remote control. Interior Monitoring System, Description

If the Airbag Control Module is triggered, a signal is sent to the convenience control module to unlock the doors.







The Convenience System Control Module -J393- is located under the instrument panel and is secured with a bracket to the steering column. It is equipped with a DTC memory. The On Board Diagnostic (OBD) connection is located under the driver's knee bar to left of the steering wheel.

The control module recognizes DTC's and malfunctions in the central locking convenience system (convenience system includes central locking, anti-theft alarm, electric windows, radio wave remote control, mirror) and stores them in a nonvolatile memory.

Testers V.A.G 1551 and 1552 can be used to check the DTC memories and code the control modules as well as the function On Board Diagnostic (OBD) of the VAS 5051.

The function "Guided Troubleshooting" of the VAS 5051 should be used for troubleshooting in diagnostic capable systems. Using this system a systematic malfunction check is guaranteed, from the fuses via wiring, connections.

The malfunction information displayed is used to refer to a DTC table with notes on the possible causes for directed repair measures.

Malfunctions which can be attributed to a temporary open circuit in the wiring or a loose contact, will also be stored. These malfunctions will be displayed as sporadic DTCs "SP".

Only statistical malfunctions are considered:
- Central locking inoperative
- Mirror positioning motor inoperative
- Electric window positioning motor inoperative
- CAN-bus communication inoperative

NOTE: Before changing a component erase DTC memory, perform functional checks and check DTC memory again.