Faulty Signal

Faulty signal

Information
The immobilizer function is integrated in the central electronic module (CEM).
This diagnostic trouble code (DTC) indicates that the immobilizer code does not match between the engine control module (ECM) and the central electronic module (CEM). This may be because:
- The immobilizer code in the engine control module (ECM) is incorrect i.e. the code does not match that stored in the central electronic module (CEM)
- The immobilizer code in the central electronic module (CEM) is incorrect.
- The engine control module (ECM) is damaged.

Note! A programmed engine control module (ECM) or central electronic module (CEM) cannot be moved from one vehicle to another.

Hint: Reading diagnostic trouble codes (DTCs) in the central electronic module (CEM)

For further information about this diagnostic trouble code (DTC), select Information, then DTC information.

Other information
- Signal specification, B5254T7 Signal Specification, Engine Control Module (ECM)
- Engine control module (ECM), B5254T7 Service and Repair

Continue - Verification

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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 - Information

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Verification

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




- Ignition off
- Reinstall connectors, components etc.
- Start the engine.

Did the engine start?

Yes - FAULT FOUND

No - Fault-tracing information

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