The airbag control unit -J234- is located behind the console on the tunnel. It is equipped with a fault memory. The self-diagnosis connection point is located behind the cover under the heating and ventilation controls.
The control unit detects faults in the airbag system and stores them in a permanent memory.
When the ignition is switched on, the airbag warning lamp -K75- lights up for about 3 seconds and then goes out again.
If the airbag warning lamp -K75- does not go out again, then there is an open circuit in the voltage supply to the airbag control unit -J234-. Fault rectification → Chapter.
If there is a fault, the airbag warning lamp -K75- lights up again.
To commence fault finding, initiate self-diagnosis and retrieve the stored information with the fault reader -V.A.G 1551-.
The fault information displayed is used to refer to a fault table with notes on the possible causes for directed repair measures.
Only visual check of wiring!
Do not carry out electrical continuity tests or measurements to ignition circuits!