Function

Function

The airbag control module -J234- is located behind the console on the central tunnel, and is equipped with Diagnostic Trouble Code (DTC) memory. The Data Link Connector (DLC) is located in the center console.

The control module detects malfunctions in the airbag system and stores them as DTCs in permanent memory.

Malfunctions which can be attributed to a temporary open circuit in the wiring or a loose connection 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- lights up for approx. 4 seconds, and then goes out again. If the airbag Malfunction Indicator Lamp (MIL) -K75- does not go out again after 4 seconds, the voltage supply to airbag control module -J234- is faulty. Check DTC memory.

A malfunction is present if the airbag Malfunction Indicator Lamp (MIL) -K75- lights up again. Check DTC memory.

To begin troubleshooting, initiate On Board Diagnostic (OBD) and retrieve the stored information with the VAG 1551 scan tool.

The malfunction information displayed is used to refer to a DTC table with notes on the possible causes of malfunctions and specific corrective actions.

WARNING!
- Check the airbag system wiring by visual inspection only.
- Do not check continuity or resistance of the airbag igniter circuits.
- Only check the wiring with the ignition switched off.
- Follow applicable safety precautions before servicing any component of the airbag system

On Board Diagnostic (OBD) Functions

The following functions are possible:
01 - Check Control Module Versions
02 - Check DTC Memory
03 - Output Diagnostic Test Mode
05 - Erase DTC Memory
06 - End Output
07 - Code Control Module
08 - Read Measuring Value Block


NOTE:
- A list of possible functions is printed out after pressing the "HELP" button.
- Do not select further functions, which can be printed out after pressing the "HELP" button.
- After the function is completed the VAG 1551 returns to the start position.


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