VOLVO
CEM-B112E21 - Twilight sensor. General Signal Failures. Signal too low
System
Sentral elektronikk (CEM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
2 modellerV40 (2013–), V40 Cross Country (2013–)
Vis modeller per årsmodell og motor (2)
Hva betyr feilkoden?
The central electronic module (CEM) reads the outside light level from the twilight sensor and uses it to set the brightness of the instrument lighting and the button lighting. The code is set when the signal from the sensor is too weak for the system to trust, and the lighting control may then behave incorrectly.
Mulige årsaker
- Signal wire shorted to ground
- Twilight sensor not working
- Poor contact at the sensor or in the wiring harness
Hva du kan gjøre
- 1Check that the fuses for the lighting and the central electronic module are intact; their locations are in the owner's manual or on the fuse box cover
- 2Check whether the instrument and button lighting works in different light conditions
- 3Check the sensor connector and its wire for chafing, short circuits to ground and loose connections
- 4Read the sensor signal with diagnostic equipment and replace the sensor if it does not respond correctly
Symptomer du kan merke1
- Instrument and button lighting does not work
Generell veiledning for bileiere. Feilsøking på bilen kan peke på en annen årsak.