Signal Missing. Permanent Fault

Signal missing. Permanent fault

Checking the signal cable




- Ignition off
- Disconnect the connector from the central electronic module (CEM)
- Disconnect connector group B from the engine control module (ECM).
Check the signal cables between central electronic module (CEM) terminal #14B and engine control module (ECM) terminal #45B. Check for an open-circuit.
Also check connector 54/3. Check for contact resistance and oxidation.
Remedy as necessary.

Other information:
- To access or replace the central electronic module (CEM) connector, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- To access or replace the engine control module (ECM) connector, see Engine control module (ECM), replacing Service and Repair
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- For information about signals, see Signal specification Pinout Values and Diagnostic Parameters
- Checking wiring and terminals Checking Wiring And Terminals.









Select Continue

Continue - Verification

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Verification




Verification

Verification

Hint: After the repair it is necessary to check that the fault has been rectified.








- Ignition off.
- Connect connectors, install components, etc.
- Start the engine.
Check that diagnostic trouble code status changes from permanent to intermittent.





Is the diagnostic trouble code status intermittent?

Yes - VERIFIED

No - VERIFICATION FAILED

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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 - No Fault Found

Attempt New Test - Checking the signal cable

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