VOLVO
CEM-1B02 - Main Battery Relay, General electrical failure
System
Sentral elektronikk (CEM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
5 modellerC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Hva betyr feilkoden?
The main battery relay is a disconnector that, during a restart after an auto stop, isolates the battery and starter circuit from the other electrics. This stops the brief voltage dip from affecting the rest of the car. The code concerns the relay's function in cars with automatic start/stop and can stop the auto stop from working.
Mulige årsaker
- The main battery relay has stuck in the open position
- A broken wire between the main battery and the relay
Hva du kan gjøre
- 1Check that the fuses are intact. The instruction book or fuse list shows their locations. Replace a blown fuse once
- 2Check that the connections at the battery and at the relay are seated and not corroded
- 3Use a multimeter to check that the wire between the battery and the relay has no break
- 4If you have a diagnostic tool, read the fault codes after a drive with auto stop and see whether they return
- 5After the work, clear the code and drive for a while to see whether auto stop works again
Symptomer du kan merke2
- Auto start/stop does not work while driving
- Auto start/stop does not work at idle
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