Symptom Related Diagnostic Procedures

1. Check fuse 4.
2. Switch off the ignition and disconnect the negative lead from the battery. Undo the bolts securing the steering wheel airbag. Unplug the connector on the back of the airbag. Plug reference resistor 84 71 153 into the connector.

On Cars With A Passenger Airbag
a. Remove the lower cover plate and unplug connector H2-77 to the passenger airbag.
b. Connect reference resistor 84 71 153 to pin connector H2-77 using cable assembly 86 11 378.

Proceed to point 3.

3. Unplug the SRS control module connector and check pin 5 for breaks and bad connections.

Refit the connector to the SRS control module. Refit the battery negative lead and switch on the ignition.
The SRS lamp should light for 3-4 seconds and then go out.
If the lamp goes out: The fault was in the connector. Return the car to good order.

NOTE: If no fault was found in the connector, the fault may be intermittent. Try to provoke any intermittent fault and see if the SRS lamp lights. If the lamp does not go out: Proceed to point 4.

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4. Switch off the ignition. Unplug the connector from the SRS control module and connect a BOB to the cable assembly. Switch on the ignition and connect a voltmeter between contact 5 on the BOB and a safe grounding point.
The voltmeter should show 7-16 V.

If the value is OK: Description of On-Board Diagnostics
If the value is incorrect: If there is no battery voltage, inspect the cable assembly between fuse 4 and the SRS control module for breaks. If there is a fault, change the cable assembly.