Faulty Signal. Permanent Fault

Faulty signal. Permanent fault

Function test
Check that the SRS indicator lamp lights.

Does the lamp light?

Yes - Checking the connector and cable

No - Checking wiring

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Checking the connector and cable








- Ignition off.
- Disconnect the control module.
- Check the control module connector for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
- Ignition on.
Connect a voltmeter between control module #25 and ground. Check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Voltage should be approximately 7 V.
If the value deviates, disconnect the combined instrument panel connector B and check #B11 for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Check the cable between combined instrument panel #B11 and control module #25 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Remedy as necessary.

Other information:
- To disconnect / replace the control module, see Sensor module, replacement Service and Repair.
- To access / replace the combined instrument panel, see Driver information module (DIM), installation/removal, component replacement Driver Information Module (DIM), Installation/Removal, Component Replacement.













Select "Continue" when the fault has been remedied.

Continue - Verification

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Checking wiring








- Check that the bulb is intact.
- Ignition off.
- Disconnect the control module.
Connect an ohmmeter between control module #25 and ground, measure for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
If there is a short-circuit to ground, the cable must be repaired or replaced. Otherwise the fault is in the combined instrument panel.
Remedy as necessary.

Other information:
- To access / replace the control module, see Sensor module, replacement Service and Repair.
- To access / replace the combined instrument panel, see Driver information module (DIM), installation/removal, component replacement Driver Information Module (DIM), Installation/Removal, Component Replacement.









Select "Continue" when the fault has been remedied.

Continue - Verification

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Verification




Verification

Verification

Hint: After carrying out the repair, check that the fault has been remedied.




- Ignition off
- Disconnect the battery negative lead
- Reinstall the connectors, components etc.
- Ignition on
- Connect the battery negative lead.

Warning! There must not be anyone inside the passenger compartment when the battery is connected.

- Read off diagnostic trouble codes (DTCs).
The fault is no longer present if the status of the diagnostic trouble code (DTC) has changed to intermittent.





Does the status change?

Yes - VERIFIED

No - VERIFICATION FAILEDPAPER

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.

Do you want to exit fault-tracing?

Yes - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Function test

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