VOLVO
CEM-9F31 - Dimmer. Signal too high
Układ
Centralny moduł elektroniczny (CEM)
Modele Volvo, których dotyczy ten kod błędu
Dotyczy następujących modeli:
5 modeliC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Co oznacza ten kod błędu?
The dimmer, meaning the rheostat for the instrument lighting, sends either too high a signal or no signal at all to the central electronic module (CEM). The fault code is then stored. The fault can cause the instrument lighting to stay on at full brightness or not work at all.
Możliwe przyczyny
- Rheostat shorted to supply voltage
- Open circuit in the signal wire
- Damaged light switch
Co możesz zrobić
- 1Turn the dimmer control with the lights on and see whether the instrument lighting changes brightness. If it does not react at all, this suggests a fault that is still present
- 2With the ignition off, check the wire from the rheostat and the connectors to the light switch for chafing, pinching and loose connections
- 3With the ignition off, use a multimeter to check whether the signal wire from the rheostat has voltage to earth; voltage there may mean a short circuit to supply voltage
- 4Remedy any wiring faults that are found and clear the fault code
- 5If the fault remains with the wiring intact, have a workshop replace the light switch
Objawy, które możesz zauważyć2
- The instrument lighting does not work
- The instrument lighting stays on at full brightness all the time
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.