VOLVO
ECM-U210787 - Collision Mitigation By Braking. Bus Signal / Message Failures. Missing message
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
9 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (24)
- Volvo S60 (2011–)2011–2012Engine B6304T4 only
- Volvo S60 (2011–)2013–2014Engine B5204T8, B5204T9, B5254T12, B5254T14, B6304T4 only
- Volvo S60 (2011–)2015Engine B5204T8, B5204T9, B5254T12, B5254T14, B6304T3, B6304T4, B6304T5 only
- Volvo S80 (2007–)2010Engine B6304T2, B6324S, B6324S2, B8444S only
- Volvo S80 (2007–)2011Engine B6304T4, B6324S4, B6324S5, B8444S only
- Volvo S80 (2007–)2012, 2015Engine B6304T4, B6324S4, B6324S5 only
- Volvo S80 (2007–)2013–2014Engine B5254T12, B5254T14, B6304T4, B6324S4, B6324S5 only
- Volvo V40 (2013–)2013–2014Engine B5204T8, B5204T9, B5254T12, B5254T14 only
- Volvo V40 (2013–)2015Engine B5204T8, B5204T9 only
- Volvo V40 Cross Country (2013–)2013–2015Engine B5204T8, B5204T9, B5254T12, B5254T14 only
- Volvo V60 (2011–)2011–2012Engine B6304T4 only
- Volvo V60 (2011–)2013Engine B5204T8, B5204T9, B6304T4 only
- Volvo V60 (2011–)2014Engine B5204T8, B5204T9, B5254T12, B6304T4 only
- Volvo V60 (2011–)2015Engine B5204T9, B5254T12, B6304T3, B6304T4, B6304T5 only
- Volvo V60 Cross Country (2015–)2015
- Volvo V70 (2008–)2010Engine B6304T2, B6324S, B6324S2 only
- Volvo V70 (2008–)2011–2012Engine B6304T4, B6324S5 only
- Volvo V70 (2008–)2013–2014Engine B5204T9, B6304T4, B6324S5 only
- Volvo V70 (2008–)2015Engine B5204T9, B6304T4 only
- Volvo XC60 (2009–)2010Engine B6304T2, B6324S, B6324S2 only
- Volvo XC60 (2009–)2011–2014Engine B6304T4, B6324S4, B6324S5 only
- Volvo XC60 (2009–)2015Engine B5204T9, B5254T12, B5254T14, B6304T4, B6324S4, B6324S5 only
- Volvo XC70 (2008–)2010Engine B6304T2, B6324S, B6324S2 only
- Volvo XC70 (2008–)2011–2015Engine B6304T4, B6324S4, B6324S5 only
What does this fault code mean?
The engine control module (ECM) gets signals from the forward sensing module (FSM) and the central electronic module (CEM) and applies braking help when a collision threatens. The code is set when one of the input signals from the FSM or the CEM is lost, which means an expected message is missing. The fault may lie in the FSM or the CEM, or in the communication between them and the engine control module.
Possible causes
- The fault is in the forward sensing module (FSM)
- Open circuit in the communication cable
- Communication cable short-circuited to ground or to voltage
- Contact resistance or oxidation in the connections
- Open circuit or short-circuit in the connections
- The fault is in the central electronic module (CEM)
What you can do
- 1Read the fault codes in the engine control module. If any of ECM-U012088, ECM-U000188, ECM-U1A1400, ECM-U000108 or ECM-U000100 is stored, check it first.
- 2Read the fault codes in the FSM and the CEM and remedy any faults there first. The engine control module code is then a follow-on fault.
- 3Check that the connectors in the CAN network are secure and clean, and look for chafed wiring.
- 4Do not replace the CEM for a CAN fault unless a workshop has confirmed an internal fault in it.
Symptoms you may notice2
- Warning symbol and message in the display
- Message in the display
General guidance for car owners. Diagnosis on the car can point to a different cause.