VOLVO
CEM-B1D3914 - Rear Wiper Motor Connection 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:
6 modelsS60 (2011–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
The central electronic module (CEM) supplies and controls the rear wiper. The code is set when the signal from the wiper is too low, which can be caused by the signal cable being shorted to ground or having an open circuit.
Possible causes
- The signal cable is shorted to ground
- Open circuit in the signal cable
What you can do
- 1Read and clear the code, then run the rear wiper
- 2Check that the rear wiper fuse is intact
- 3Use a multimeter to check that the signal cable has no contact with ground (the bodywork)
- 4Check that the connectors at the wiper motor are fully seated and not corroded
- 5If the wire is intact, have a workshop with diagnostic equipment check the module output
Symptoms you may notice1
- The rear wiper does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.