Signal Missing. Permanent Fault

Signal missing. Permanent fault

Checking wiring








- Ignition off.
- Disconnect the collision sensor connector.
- Disconnect the control module connector.









Hint: The sensor transmits a live signal to the control module. This allows the control module to check communication with the side impact sensors. If the signal is missing, a diagnostic trouble code (DTC) is stored.

Check the connectors for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check the cable between side impact sensor connector #1 and control module connector #21 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and for a short-circuit to ground.
Now repeat the reading on the cable between side impact sensor connector #2 and control module connector #46.
Remedy as necessary.

Other information
- To access the collision sensor connector, see Side impact sensors Service and Repair.

Was a fault detected?

Yes - Verification

No - Replacing the component

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Replacing the component




Try a new side impact sensor according to Side impact sensors Service and Repair.
Remedy as necessary.

Other information
- To access the control module connector, see SRS control module Service and Repair.

Continue - Verification

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Verification

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








- Ignition off.
- Reinstall the connectors etc.
- Ignition on.
Read off the signal from the collision sensor. The sensor transmits a live signal if there is no fault.





Is there a live signal from the collision sensor?

Yes - FAULT FOUND

No - Fault-tracing information
No Fault Found

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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 - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking wiring

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