K80 Airbag failure warning light on
- Make
- Alfa Romeo
- Model
- 156 Factory Service Manual
- Year
- 1997–2002
- Section
- Instruments › K80 Airbag failure warning light on
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.
| Step | Test procedure | Result | Action |
|---|---|---|---|
| 1 | CHECK WITH DIAGNOSTIC EQUIPMENT Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Check:
| OK | |
| An error is detected in the control unit |
End of diagnosis | ||
| Lack of dialogue with the control unit | Restore:
End of diagnosis | ||
| 2 | CHECK CONTROL INSTRUMENT SUPPLY CHECK NOTE: 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 | OK | |
| Connections not correct |
End of diagnosis | ||
| Instrument not working |
End of diagnosis | ||
| 3 | CHECK CORRECT OPERATION Check that the fault is no longer present | OK | End of diagnosis |
| Fault persists | Incorrect selection of diagnostic procedure |
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