VOLVO
CEM-B1C7914 - Front Washer Pump Relay Coil Circuit. General Electrical Failures. Circuit short to ground or open
System
Sentral elektronikk (CEM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
7 modellerS60 (2011–), S80 (2007–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Hva betyr feilkoden?
The central electronic module (CEM) activates the washer pump by connecting the control line of one of two pump relays in the passenger compartment fuse box to ground. The code is set when the control signal to the windscreen washer relay is low even though windscreen washing has not been activated, or when the control module detects an open circuit.
Mulige årsaker
- Open circuit on the signal wire from the CEM to the relay
- The signal wire is shorted to ground
- Damaged relay
Hva du kan gjøre
- 1Read and clear the code, then run the windscreen washer and see whether it works and whether the code returns
- 2Check the washer pump fuses in the passenger compartment fuse box and make sure they are intact
- 3Use a multimeter to check that the signal wire to the relay has no contact with ground (the bodywork) and is not broken
- 4Check that the connectors at the relay and in the passenger compartment fuse box are fully engaged and not corroded
- 5If the wire is sound, have a workshop with diagnostic equipment check the relay and the control signal
Symptomer du kan merke2
- The windscreen washer does not work
- The windscreen washing is poor
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