Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-B10F311

Condition
The Central electronic module (CEM) powers the front left-hand parking lamps 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:
- Activated lamp.

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 switches off permanently after 100 operating cycles where the fault was detected. Erasing diagnostic trouble codes (DTCs) resets the result.

Possible source

Hint: On XC60 before structure week 200946 front running lights and side running lights, on the same side of the vehicle, are supplied with voltage from a common output on the Central electronic module (CEM). In case the bulb for the side running light is damaged, this is detected by Central electronic module (CEM), which turns off the output so that the front running light also turns off.

- Damaged side running light front.
- Defective running light front.
- Short-circuit to ground in the power supply cable.

Fault symptom[s]
- Side marking lights/Does not work
- Text window and warning symbol/Text message