VOLVO
CEM-B112E21 - Twilight sensor. General Signal Failures. Signal too low
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 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.
Mögliche Ursachen
- Signal wire shorted to ground
- Twilight sensor not working
- Poor contact at the sensor or in the wiring harness
Was Sie tun können
- 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
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.