VOLVO
BECM-C105B00 - Hybrid/EV Battery Aux Contactor Circiut Stuck Closed. General Failure Information. No sub type information
System
Battery Energy Control Module (BECM)
Volvo models this fault code applies to
Applies to the following models:
1 modelV60 (2011–)
Show models by year and engine (2)
What does this fault code mean?
The BECM controls and monitors the contactors of the high voltage battery at the same time. The code is stored when there is voltage in the auxiliary circuit (AUX) even though the contact on the positive side has been commanded open, which means the contact is stuck in the closed position. The fault may be caused by a damaged high voltage battery.
Possible causes
- The high voltage battery is damaged
What you can do
- 1Read and note the fault code, clear it and road test to check whether it returns
- 2Check that the car's ordinary battery is charged and in good condition
- 3Have a workshop with diagnostic equipment check the contactors and the high voltage battery
- 4The high voltage system should only be handled by qualified personnel, so have a workshop carry out all work on the battery and other high voltage parts
Symptoms you may notice4
- Red warning symbol and message in the display
- Charging of the high voltage battery stops or works poorly, especially while driving
- The battery may be discharged or charge poorly
- Low voltage in the battery or a dead battery
What the fault can affect1
- The high voltage battery cannot be charged
General guidance for car owners. Diagnosis on the car can point to a different cause.