Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-C111B11

Condition

Note! On V70 and XC70 the same output supplies both left and right brake lights.

The central electronic module (CEM) powers the left-hand stop lamp directly via an output.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- Signal too low from the output.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Activated stop 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 (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
- Contact resistance, oxidation or poor contact in connections.
- The signal cable is short-circuited to ground.

Fault symptom[s]
- Tail light/Brake light does not work
- Text window and warning symbol/Text message