VOLVO
CEM-B1C9013 - Auxillary Driving Lamps Relay. General Electrical Failures. Circuit open
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
The central electronic module (CEM) switches the auxiliary lights on through a control signal. The code is linked to an open circuit in the control signal wire, and The fault is therefore usually noticed first when you try to switch the auxiliary lights on.
Possible causes
- Open circuit on the control signal wire
What you can do
- 1Read and clear the code, then switch on the auxiliary lights and see whether they work
- 2Check that the fuse for the auxiliary lights is intact
- 3Look for loose, corroded or broken connectors on the control signal wire to the auxiliary light relay
- 4Use a multimeter to check that the control signal wire is continuous between its two ends
- 5If the wire is intact, have a workshop with diagnostic equipment check the relay and the control signal from the module
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.