VOLVO
ECM-U012900 - Lost Communication With Brake System Control Module. General Failure Information. No sub type information
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
14 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–), XC90 (2003–)
Show models by year and engine (41)
- 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–)2011–2012All engines except: B5254T5
- Volvo S60 (2011–)2013
- Volvo S60 (2011–)2014–2015All engines except: B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5
- Volvo S80 (2007–)2007Engine B6324S, B8444S only
- Volvo S80 (2007–)2008All engines except: B5254T6, D5244T4, D5244T5
- Volvo S80 (2007–)2009All engines except: B5254T6, B5254T8, D5244T4, D5244T5
- Volvo S80 (2007–)2010–2011All engines except: B5254T10, B5254T11, B5254T8, D4164T
- Volvo S80 (2007–)2012All engines except: B5254T10
- Volvo S80 (2007–)2013
- Volvo S80 (2007–)2014–2015All engines except: B4204T11, B4204T12, B4204T15, D4204T5
- Volvo V40 (2013–)2013–2014
- Volvo V40 (2013–)2015All engines except: B4204T11, D4204T14
- Volvo V40 Cross Country (2013–)2013–2014
- Volvo V40 Cross Country (2013–)2015All engines except: B4204T11, D4204T14
- Volvo V50 (2004–2013)2011–2012Engine D4162T, D5204T, D5204T5 only
- Volvo V60 (2011–)2011–2012
- Volvo V60 (2011–)2013All engines except: D82PHEV
- Volvo V60 (2011–)2014All engines except: B4204T11, B4204T12, B4204T15, B4204T9, D4204T5, D82PHEV
- Volvo V60 (2011–)2015All engines except: B4204T11, B4204T12, B4204T15, B4204T9, D4204T5, D82PHEV, D87PHEV
- Volvo V60 Cross Country (2015–)2015
- Volvo V70 (2008–)2008All engines except: B5254T6, D5244T4, D5244T5
- Volvo V70 (2008–)2009All engines except: B5254T6, B5254T8, D5244T4, D5244T5
- Volvo V70 (2008–)2010–2011All engines except: B5254T10, B5254T11, D4164T
- Volvo V70 (2008–)2012All engines except: B5254T10
- Volvo V70 (2008–)2013
- Volvo V70 (2008–)2014–2015All engines except: B4204T11, D4204T5
- Volvo XC60 (2009–)2009Engine B6304T2 only
- Volvo XC60 (2009–)2010–2013
- Volvo XC60 (2009–)2014–2015All engines except: B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5
- Volvo XC70 (2008–)2008Engine B6324S only
- Volvo XC70 (2008–)2009Engine B6304T2, B6324S only
- Volvo XC70 (2008–)2010–2013
- Volvo XC70 (2008–)2014–2015All engines except: B4204T11, D4204T5
- 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–)2012–2014Engine B6324S5 only
What does this fault code mean?
The engine control module (ECM) receives brake pedal position information from the brake control module (BCM) over the CAN network. The code is set when the engine control module has no communication with the brake control module and an expected message from it is missing. The code affects the cruise control.
Possible causes
- Break in one or more CAN wires
- Short circuit between the CAN wires, or to ground or supply voltage
- Contact resistance or oxidation in the contacts
- Internal fault in the brake control module (BCM)
- Fault inside the engine control module (ECM)
- The engine control module or brake control module does not have the correct software for the car
What you can do
- 1Read the codes in the central electronics control module and other affected control modules and fix them first. Then clear this code
- 2Check that the fuses are intact
- 3Check the connectors on the CAN network for contact resistance and oxidation
- 4Look for chafed wiring. Use a multimeter to check that the CAN wires have no break or short to ground or supply voltage
- 5Clear the code, start the engine and check whether it is set again
- 6Do not work on the braking system yourself. If the fault returns: have a workshop with diagnostic equipment check the brake control module and the CAN network
Symptoms you may notice3
- Cruise control does not work at all
- Text message and warning symbol in the display
- The engine does not start
What the fault can affect1
- The cruise control is switched off for as long as the fault is active
General guidance for car owners. Diagnosis on the car can point to a different cause.