VOLVO
CEM-B112E22 - Twilight sensor. General Signal Failures. Signal too high
Układ
Centralny moduł elektroniczny (CEM)
Modele Volvo, których dotyczy ten kod błędu
Dotyczy następujących modeli:
2 modeleV40 (2013–), V40 Cross Country (2013–)
Pokaż modele wg rocznika i silnika (2)
Co oznacza ten kod błędu?
The CEM receives information about the light conditions from the twilight sensor and uses it for the brightness of the symbols and instrument lighting. The code is stored when the signal level from the twilight sensor is too high, which is caused by the signal cable touching supply voltage or by the sensor not working. The instrument and button lighting then does not work.
Możliwe przyczyny
- The signal cable touches supply voltage
- The twilight sensor does not operate
Co możesz zrobić
- 1Check that the relevant fuses are intact. Their locations are in the owner's manual or on the fuse box cover
- 2Use a multimeter to check whether the signal cable to the twilight sensor has voltage when the ignition is off
- 3Look for chafing and pinch damage on the signal cable to the sensor
- 4If you have a diagnostic tool: read the twilight sensor value in live data and check that it changes when the light changes
- 5If the fault returns, have a workshop with diagnostic equipment check the sensor and the wiring
Objawy, które możesz zauważyć1
- Instrument and button lighting does not work
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.