VOLVO
CEM-B1A7911 - Rear Fog Lamp Circuit. General Electrical Failures. Circuit short to ground
System
Zentralelektronik (CEM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
7 ModelleS60 (2011–), S80 (2007–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Was bedeutet der Fehlercode?
The CEM supplies the rear fog lamps directly from an output, and the fault is stored when the wire supplying the fog lamps is short-circuited to earth.
Mögliche Ursachen
- The supply wire is short-circuited to earth
Was Sie tun können
- 1Check that the fuses are intact
- 2Check the wiring from the CEM to the rear fog lamps for chafing and pinch damage, particularly where it may have touched the body
- 3Use a multimeter to check that the supply wire has no contact with earth (the body) with the connectors disconnected
- 4Clear the fault code and check whether it returns when the fog lamps are switched on
- 5If the fault returns, have a workshop with diagnostic equipment fault-trace the control module and the wiring
Symptome, die Sie bemerken können2
- The rear fog lamps do not work
- A message appears in the display
Was der Fehler beeinflussen kann3
- The fog lamps switch off during the driving cycle in which the fault is detected
- If the fault remains, the function is switched off permanently after 100 driving cycles where the fault was detected
- Erasing fault codes or starting a new driving cycle resets the output
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.