Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-B1A7911

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:
- Short-circuit to ground in the power supply cable.
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
- The function (the output) turns off during the driving cycle when fault is detected. The function (the output) switches off permanently after 100 operating cycles where the fault was detected. Erasing trouble codes as well as start of new driving cycle resets the output.

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

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