Fault-Tracing Information

Fault-tracing information

Checking diagnostic trouble codes (DTCs) in the central electronic module (CEM)

Hint: This diagnostic trouble code is generated in combination with other trouble codes.

Check to see if diagnostic trouble code CEM-U021400 is stored. Fault-trace this diagnostic trouble code (DTC) first.
Select an alternative below

Are there relevant diagnostic trouble codes (DTCs)?

Yes - DONE

No - Downloading new software

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Downloading new software
Try fixing the problem by downloading new software in Keyless vehicle module (KVM).
When downloading, codes for immobilizer function will also be downloaded to Keyless vehicle module (KVM).
Check after downloading if the vehicle can be started via the keyless function.





Is the function OK?

Yes - Verification

No - Replacing the control module

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Replacing the control module
An internal problem has occurred in Keyless vehicle module (KVM). Replace the control module.

Other information
- Keyless vehicle module (KVM) 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, components etc.
Check that the vehicle can be started without a key.

Is the function OK?

Yes - FAULT FOUND

No - Downloading new software

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