VOLVO
CEM-B1A7901 - Rear Fog Lamp Circuit. General Failure Information. General electrical failure
Układ
Centralny moduł elektroniczny (CEM)
Modele Volvo, których dotyczy ten kod błędu
Dotyczy następujących modeli:
4 modeleS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Pokaż modele wg rocznika i silnika (4)
Co oznacza ten kod błędu?
The CEM supplies the rear fog lamps directly from an output. The fault is stored when the supply wire has a break or is short-circuited to earth, and then the rear fog lamps do not work.
Możliwe przyczyny
- The supply wire is short-circuited to earth
- Open circuit in the supply wire
Co możesz zrobić
- 1Check that the fuses for the fog lamps are intact
- 2Switch on the fog lamps and see whether the rear lamps light, then clear the fault code and road test
- 3Check the supply wire to the rear fog lamps for breaks, chafing and pinch damage
- 4Use a multimeter to check that the supply wire is continuous between the connector ends and has no contact with earth
- 5If the fault returns, have a workshop with diagnostic equipment fault-trace the control module and the wiring
Objawy, które możesz zauważyć2
- The rear fog lamps do not work
- A message appears in the display
Na co może wpływać usterka3
- The output switches off during the driving cycle in which the fault is detected
- If the fault remains, the output is switched off permanently after 100 driving cycles where the fault was detected
- Erasing the fault codes and starting a new driving cycle resets the output
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.