Airbag system, On Board Diagnostic (OBD): Function: Notes

The Airbag Control Module -J234- is located behind the console on the tunnel. 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 detects malfunctions in the airbag system and stores them in a permanent memory.

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".

After the ignition is switched on, the Airbag Malfunction Indicator Lamp (MIL) -K75- comes on for about 4 seconds and then goes out again. If the lamp then flashes for a further 15 seconds this signals that the airbags or the belt tensioners are electronically blocked.

• If the warning lamp -K75- does not go out again after about 4 seconds, then the voltage supply to the Airbag Control Module -J234- is malfunctioning. Check DTC memory. Refer to Check DTC Memory  .
• A malfunction is present if the warning lamp -K75- lights up again. Check DTC memory. Refer to Check DTC Memory  .
• If the warning lamp -K75- flashes continuously then the control module -J234- must be replaced.

To commence troubleshooting, initiate self-diagnosis and retrieve the stored information with the V.A.G 1551 scan tool.

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