184000541 - K80 AIRBAG FAILURE WARNING LIGHT ON
 | The Air Bag failure warning light is lit up by a command sent via the C-CAN from the Air Bag Node to the Body Computer. The latter, sends the signal to the Instrument Panel Node via the B-CAN |
| Results of the tests | ||||
| 0 | PRELIMINARY CHECKS | All OK | Problems met | Operation |
|---|---|---|---|---|
Connect the EXAMINER diagnostic equipment and check the CAN NETWORK INFORMATION:
| Continue to Step 1 | Presence of faults in the CAN | Continue as instructed by the tester | |
| Impossible to converse with the Body Computer | Continue to Step 7 | |||
| 1 | CHECK WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
Keeping the diagnostic equipment connected, check for the following at the AIR BAG NODE:
| Continue to Step 2 | System/component fault | Continue according to the instructions for the diagnostic equipment | |
| Presence of C-CAN faults | Continue to Step 9 | |||
| 2 | CHECK WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
| Using the Examiner check, in the Instrument Panel Node ambient, that there are no errors and the following parameters are present. | Continue to Step 3 | There are errors | Continue in accordance with the instructions for the diagnostic equipment | |
| 3 | ELECTRIC POWER SUPPLY CHECK | All OK | Problems met | Operation |
| Check that the Instrument Panel Node electrical power supply is correct. | Continue to Step 4 | Positive and/or earth electrical power supply fault. | Replace the defective component (if a fuse is involved, search for the cause of the problem). | |
| 4 | CHECK ELECTRICAL CONNECTIONS | All OK | Problems met | Operation |
| Check the electrical connections between the Body Computer and the Instrument Panel, in particular that each individual pin is correctly connected. | Continue to Step 5 | Electrical connections not working. | Restore damaged electrical connection. | |
| 5 | CHECK WITH ACTIVE DIAGNOSIS | All OK | Problems met | Operation |
| With the Examiner in the Instrument Panel Node ambient, check, in active diagnosis, that the Air Bag warning light is correctly activated | Continue to Step 6 | The Air Bag warning light is not working properly | Replace the instrument panel Op. 5560B11 | |
| 6 | CHECK WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
| Using the Examiner, check, in the Body Computer Node ambient, that there are no errors and that the warning light status varies | Continue to Step 9 | Impossible to connect with the Body Computer control unit. | Continue to Step 7 | |
| Errors present. | The parameter values do not change | |||
| The parameter values do not change | Continue to Step 9 | |||
| 7 | ELECTRIC POWER SUPPLY CHECK | All OK | Problems met | Operation |
| Check that the Body Computer Node electrical power supply is correct. | Continue to Step 8 | Positive and/or earth electrical power supply fault. | Replace the defective component (if a fuse is involved, search for the cause of the problem). | |
| 8 | CHECK WITH DIAGNOSTIC EQUIPMENT | All OK | Problems met | Operation |
| Using the Examiner, check the possibility of connecting with the Body Computer Node. | Continue to Step 6 | Impossible to connect with the Body Computer control unit. | Replace the Body Computer Op. 5505A32 | |
| 9 | CHECK ON CORRECT OPERATION | All OK | Problems met | Operation |
| Check that the fault is no longer present | End of diagnosis | The fault persists | Replace the Body Computer Op. 5505A32 | |