3233098 - K80 AIRBAG FAILURE WARNING LIGHT ON

During starting, the air bag failure warning light comes on and remains on for more than 4 seconds. (after carrying out the initial control unit test, the warning light should go out, ...)In the case of a reasonably serious impact which has caused the activation of the complete system (Air Bag and pretensioners), the warning light stays on. The control unit memory cannot be cleared, so the control unit must always be replaced.If, on the other hand, only the pretensioners have been activated, the memory can be cancelled using the diagnostic equipment (Examiner or other instruments) twice. In this case, the "Air Bag failure" warning light goes out. The control unit only has to be replaced if it is activated a third time.
Results of the tests
1CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket

Check:

  • there are no faults in the air bag control unit
  • plausibility of all the parameters
 Continue to Step 2 An error is detected in the control unitContinue according to the instructions for the diagnostic equipment
Lack of dialogue with the control unit

Restore:

  • the connection between the Air Bag control unit and the diagnostic connector
( See   E7030  AIRBAG ).
2CHECK CONTROL INSTRUMENT SUPPLY CHECKAll OKProblems metOperation
The air bag warning light is fitted with an interior circuit that monitors the connection between warning light and control unit.
Check the connection between the Air Bag control unit and the check control instrument ( See   E7030  AIRBAG ). 		Continue to Step 3 Connections not correctRestore the connections
Instrument not working Replace the check control instrument Op.   5560C60 
3CHECK CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'