Fault Code 5540

Fault Code 5540

DME: fault stored in ECM

NOTE: The fault is sent via the CAN bus. The PSM system switches off for safety reasons. The PSM is not faulty.

Diagnostic conditions
- Ignition on
- Internal control module test
- DME fault memory contains a fault

Possible cause of fault
- Fault in DME

Diagnosis/troubleshooting