VOLVO
CEM-B112E22 - Twilight sensor. General Signal Failures. Signal too high
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 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.
Mulige årsaker
- The signal cable touches supply voltage
- The twilight sensor does not operate
Hva du kan gjøre
- 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
Symptomer du kan merke1
- Instrument and button lighting does not work
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