VOLVO
CEM-B1D1314 - Interior lights #1 circuit. General Electrical Failures. Circuit short to ground or open
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
4 modelsS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (4)
What does this fault code mean?
The central electronic module (CEM) supplies the interior lighting. The code is set when the signal from the output is too low, which can be caused by a short to ground or an open circuit in the supply wire.
Possible causes
- The supply wire to the interior lighting is shorted to ground
- Open circuit in the supply wire to the interior lighting
What you can do
- 1Read and clear the code, then switch on the interior lighting and see whether it works
- 2Check that the fuse for the interior lighting is intact
- 3Look for loose, corroded or broken connectors in the supply wire
- 4Use a multimeter to check that the supply wire has no contact with ground (the bodywork)
- 5If the wiring is complete, have a workshop with diagnostic equipment check the module output
Symptoms you may notice1
- The interior lighting does not work
What the fault can affect3
- The function switches off during the driving cycle in which the fault is detected
- After repeated driving cycles with the fault, the function is switched off permanently
- Clearing the fault codes and starting a new driving cycle resets the output
General guidance for car owners. Diagnosis on the car can point to a different cause.