VOLVO
BCM-U000100 - High Speed CAN Communication Bus. General Failure Information. No sub type information
System
Brake Control Module (BCM)
Volvo models this fault code applies to
Applies to the following models:
12 modelsC30 (2007–2013), C70 (2006–2013), S40 (2004–2013), S60 (2011–), S80 (2007–), V50 (2004–2013), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (17)
- 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 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
- Volvo XC90 (2003–)2005–2006Engine B8444S only
- Volvo XC90 (2003–)2007–2010Engine B6324S, B8444S only
- Volvo XC90 (2003–)2011Engine B6324S5, B8444S only
- Volvo XC90 (2003–)2012Engine B6324S5 only
- Volvo XC90 (2003–)2013–2014All engines except: B5254T9
What does this fault code mean?
Control modules in the car send and receive information via CAN, a standardised serial communication method. The brake control module (BCM) has detected that the communication on the CAN network is disturbed by another module, or that its own messages are disturbing the network. The fault can only be read out when it is intermittent.
Possible causes
- Short circuit between the CAN wires
- Open circuit in one of the CAN wires
- Internal fault in the brake control module
- Internal fault in another module on the same part of the CAN network
What you can do
- 1Read codes in the central electronic module; if it shows a loss of power to a module, troubleshoot that module first
- 2Measure the CAN wires against ground, against supply voltage and against each other, looking for shorts and open circuits
- 3Have a workshop disconnect modules on the network one at a time to identify the one causing the disturbance, and replace it if it communicates incorrectly
- 4Clear the codes and check whether the communication fault returns after a road test
- 5The brake system is safety-critical, so have a workshop carry out all work on the network and the modules
Symptoms you may notice5
- ABS warning lamp lit and ABS does not work
- Brake circuit does not function and the warning lamp is lit
- Traction control warning lamp lit
- Traction and stability functions do not work
- Adaptive cruise control, collision warning and the electronic parking brake work incompletely
What the fault can affect2
- The brake control module switches itself off and stays off until the power supply is broken and restored
- Dynamic stability control (AYC) is disabled
General guidance for car owners. Diagnosis on the car can point to a different cause.