Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-B1A7901

Condition
The central electronic module (CEM) powers the rear fog lamp directly via an output.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- The cable for voltage feed has an open circuit or is short-circuited to ground.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Ignition switch position I and II.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.

Substitute value
- None.

Possible source
- Short-circuit to ground in the power supply cable.
- Open-circuit in the power supply cable.

Fault symptom[s]
- Rear fog lamp not working
- Message in display