2888408 - 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 an impact which has cause the system to be activated, the warning light stays on The control unit memory cannot be cleared, so the control unit must always be replaced.
If the vehicle is not fitted with an Air Bag, a specific bridge is located on the back of the instrument, against the symbol indicating the relevant system: the warning light will stay on permanently if this missing.
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 2An error is detected in the control unitContinue according to the instructions for the diagnostic equipment
Lack of dialogue with the control unitRestore the connection between Air Bag control unit and diagnostic connector ( See   E7030  AIRBAG )
2CHECK INSTRUMENT POWER SUPPLYAll 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 betwen air bag control unit and instrument ( See   E7030  AIRBAG ). 		Continue to Step 3Connections not correctRestore the connections
Instrument not workingChange the instrument Op.   5560B10 
3CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'