VOLVO
CEM-B1C9014 - Auxillary Driving Lamps Relay Coil 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) controls the auxiliary lights through a relay. The code is set when the voltage on the control signal wire is low, even when the control module is not sending an activation signal.
Possible causes
- Blown fuse
- Damaged relay
- The supply wire is shorted to ground
- Open circuit on the supply wire
What you can do
- 1Read and clear the code and check whether it comes back after a new driving cycle
- 2Check the auxiliary light fuse; if it is blown, find the cause before a new one is fitted
- 3Use a multimeter to check that the supply wire has no contact with ground (the bodywork)
- 4Use a multimeter to check that the supply wire is continuous between its two ends
- 5If the fuse and wire are sound, have a workshop check the auxiliary light relay
Symptoms you may notice1
- The auxiliary lights do not work
General guidance for car owners. Diagnosis on the car can point to a different cause.