VOLVO
CEM-B112E21 - Twilight sensor. General Signal Failures. Signal too low
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 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.
Możliwe przyczyny
- Signal wire shorted to ground
- Twilight sensor not working
- Poor contact at the sensor or in the wiring harness
Co możesz zrobić
- 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
Objawy, które możesz zauważyć1
- Instrument and button lighting does not work
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.