VOLVO
BCM-U300316 - Battery Voltage. General Electrical Failures. Circuit voltage below threshold
System
Brake Control Module (BCM)
Volvo models this fault code applies to
Applies to the following models:
13 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V50 (2004–2013), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (14)
- Volvo C30 (2007–2013)2011–2013Engine D4162T, D5204T, D5204T5 only
- Volvo C70 (2006–2013)2011Engine D5204T, D5204T5 only
- Volvo C70 (2006–2013)2012–2013All engines except: B5254T7
- Volvo S40 (2004–2013)2011–2012Engine D4162T, D5204T, D5204T5 only
- Volvo S60 (2011–)2011–2015
- Volvo S80 (2007–)2007–2015
- Volvo V40 (2013–)2013–2015
- Volvo V40 Cross Country (2013–)2013–2015
- Volvo V50 (2004–2013)2011–2012Engine D4162T, D5204T, D5204T5 only
- Volvo V60 (2011–)2011–2015
- Volvo V60 Cross Country (2015–)2015
- Volvo V70 (2008–)2008–2015
- Volvo XC60 (2009–)2009–2015
- Volvo XC70 (2008–)2008–2015
What does this fault code mean?
The brake control module (BCM) measures the battery voltage and sets the code when it is too low while the fastest-turning wheel is above the speed limit. Low voltage can affect the brake system's electronics, and the cause is most often the battery, the charging system or a poor connection.
Possible causes
- Contact resistance in the connections
- Battery voltage too low
- Fault in the charging system
- Break in the supply wire
- Blown fuse
- Internal fault in the brake control module
What you can do
- 1Start the engine and let it idle; the voltage should be normal system voltage
- 2If the voltage is too low, have a workshop check the charging system and the battery with diagnostic equipment
- 3Check the fuses for the brake system and the connectors at the brake control module for contact resistance and oxidation
- 4Check that the supply wire to the brake control module has no break
- 5The brake and stability systems are safety-critical, so have a workshop carry out any work on the electrical system and the brake control module
Symptoms you may notice5
- ABS warning lamp lit
- Brake circuit warning lamp lit
- Traction control warning lamp lit
- Stability function does not work
- Traction control does not work
What the fault can affect3
- Stability control is disabled
- Traction control is disabled
- Dynamic stability control (AYC) is disabled
General guidance for car owners. Diagnosis on the car can point to a different cause.