VOLVO
CEM-B1C7914 - Front Washer Pump Relay Coil Circuit. General Electrical Failures. Circuit short to ground or open
Układ
Centralny moduł elektroniczny (CEM)
Modele Volvo, których dotyczy ten kod błędu
Dotyczy następujących modeli:
7 modeliS60 (2011–), S80 (2007–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Co oznacza ten kod błędu?
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.
Możliwe przyczyny
- Open circuit on the signal wire from the CEM to the relay
- The signal wire is shorted to ground
- Damaged relay
Co możesz zrobić
- 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
Objawy, które możesz zauważyć2
- The windscreen washer does not work
- The windscreen washing is poor
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.