Fault-Tracing Information

Fault-tracing

Checking software
Diagnostic trouble code CEM-U300004 indicates a fault in the central electronic module (CEM) internal processes.

Action
- Delete diagnostic trouble codes in the central electronic module (CEM).
- Download new software to the Central electronic module (CEM).

Choose Continue to proceed to verification.

Continue - Verification

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Verification




Verification

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








- Ignition off
- Reinstall the connectors, components etc.
- Switch on the ignition for at least 10 seconds.
Try communicating with the control module by selecting one of the functions for vehicle communication under the Diagnostic tab.

Is communication established?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFIED - FAULT FOUND

VERIFICATION FAILED - Checking software

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