VOLVO
CEM-B112E22 - Twilight sensor. General Signal Failures. Signal too high
System
Zentralelektronik (CEM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
2 ModelleV40 (2013–), V40 Cross Country (2013–)
Modelle nach Baujahr und Motor anzeigen (2)
Was bedeutet der Fehlercode?
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.
Mögliche Ursachen
- The signal cable touches supply voltage
- The twilight sensor does not operate
Was Sie tun können
- 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
Symptome, die Sie bemerken können1
- Instrument and button lighting does not work
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.