Fault-Tracing Information

Fault-tracing

Checking the voltage and ground terminal
Check that the fuse for Combustion preheater module (CPM) on the relay and fuse box engine compartment is intact.
Check the cable for the supply voltage for breakage and a short-circuit to ground. Also check the intermediate connectors. Check for contact resistance and oxidation
Check the ground cable for the Combustion preheater module (CPM) for open circuit and loose connection.

Other information
- Checking wiring and terminals Checking Wiring and Terminals. Permanent Faults

Was a fault detected?

Yes - Verification

No - Checking CAN cables

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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 - 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 - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking the voltage and ground terminal

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Checking CAN cables

No Fault Found - Fault-tracing information

DONE - DONE

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