Air Bag Systems: Testing and Inspection

1. Functional check of airbag lettering. Turn on ignition. The airbag lettering must light up for approx. 5 seconds. If the lettering remains dim, check bulb and/or supply voltage.

2. Disconnect connector for contact unit (below instrument panel).

3. Turn on ignition.




The airbag lettering must now indicate a fault. Read out fault memory and check if 27; Ignition pill circuit 1 - open circuit; is indicated (with new control unit: 49).

Note
In addition to the airbag lettering, the central warning lamp and the Fasten Seatbelts symbol (US models only) must light its fault is Stored in the fault memory.

3a. Alternate fault simulation: Remove fuse for power supply to the instrument cluster for approx. 30 seconds with the ignition switched on.
- In this case, fault code 30 (with new control unit: 58) Warning light: short circuit to battery + or ground; fault currently not present, must be indicated.

4. Reconnect connector and erase fault memory.

5. Make sure no covers, decals or similar items are fitted to the steering wheel and in the passenger airbag area.

6. Visual inspection of components for darnages and modifications.

7. After checking the system, confirm the check in the appropriate fields of the warranty and maintenance booklet.