VOLVO
CEM-B13DF01 - Main Battery Diode Or Relay. General Failure Information. General electrical failure
System
Sentral elektronikk (CEM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
9 modellerS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Hva betyr feilkoden?
This fault code only applies to cars with automatic engine start/stop. The CEM monitors the main battery relay, the main battery diode and the secondary battery relay. The fault is stored when the supply voltage to the CEM is too low on a restart after an auto stop. The causes lie in the relays, the diode, the fuse or the wiring to the secondary battery, or in a battery with poor capacity.
Mulige årsaker
- The main battery relay has stuck in the closed position
- The secondary battery relay is damaged or has stuck in the open position
- Damaged main battery diode
- Damaged fuse for the secondary battery
- Open circuit in the wire to the secondary battery
- The secondary battery has poor capacity
Hva du kan gjøre
- 1Check that the fuse for the secondary battery is intact
- 2Check that the battery is fully charged and has good capacity, and that the terminals and cables are clean and intact
- 3Check the wire to the secondary battery for breaks and loose connectors
- 4If you have a diagnostic tool, check in live data what voltage the CEM sees when the engine is restarted after an auto stop
- 5If no fault is found, have a workshop check the relays and the diode and replace them if needed
Symptomer du kan merke2
- The automatic start/stop function does not work while driving
- The automatic start/stop function does not work at idle
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