Signal Too Low. Permanent Fault

Signal too low. Permanent fault

Checking the signal cable








- Ignition off.
- Disconnect the connector from the central electronic module (CEM).

Hint: The signal line goes from the Central electronic module (CEM) to ground via glass breakage circuit left, glass breakage circuit right and glass breakage circuit tailgate.

Check the signal cable. Check for a short-circuit to ground.
Begin by measuring at the grounding point and then go backward along the circuit to find the defect.
Remedy as necessary.









Other information
- Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- Signal specification Pinout Values and Diagnostic Parameters
- Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- For further information, see the wiring diagram.
- Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault

Is the signal cable OK?

Yes - Fault-tracing information

No - Verification

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Verification




Verification

Verification

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




- Ignition off.
- Reinstall the connectors, components etc.
- Shut all the doors. Activate the alarm.
- Deactivate alarm.
Check that the diagnostic trouble code (DTC) status displays Intermittent.





Does the diagnostic trouble code (DTC) status display Intermittent?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - 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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - No Fault Found

Attempt New Test - Checking the signal cable

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