VOLVO
ECM-U210782 - Collision Mitigation By Braking. Bus Signal / Message Failures. Alive / sequence counter incorrect / not updated
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
10 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (42)
- Volvo S60 (2011–)2011All engines except: B5254T5, D5204T2, D5244T10
- Volvo S60 (2011–)2012All engines except: B5254T5, D5204T3, D5244T11, D5244T15
- Volvo S60 (2011–)2013All engines except: D5204T3, D5204T7, D5244T11, D5244T15
- Volvo S60 (2011–)2014Engine B4164T, B4164T2, B4164T3, B4204T7, B5204T8, B5204T9, B5254T12, B5254T14, B6304T4, D4162T only
- Volvo S60 (2011–)2015Engine B4164T, B4164T2, B4164T3, B5204T8, B5204T9, B5254T12, B5254T14, B6304T3, B6304T4, B6304T5, D4162T only
- Volvo S80 (2007–)2007Engine B6324S, B8444S only
- Volvo S80 (2007–)2008–2009Engine B6304T2, B6324S, B8444S only
- Volvo S80 (2007–)2010Engine B4204T6, B6304T2, B6324S, B6324S2, B8444S only
- Volvo S80 (2007–)2011Engine B4164T, B4204T6, B4204T7, B6304T4, B6324S4, B6324S5, B8444S only
- Volvo S80 (2007–)2012All engines except: B5254T10, D5204T3, D5244T11, D5244T15
- Volvo S80 (2007–)2013All engines except: D5204T3, D5204T7, D5244T11, D5244T15
- Volvo S80 (2007–)2014All engines except: B4204T11, B4204T12, B4204T15, D4204T5, D5204T3, D5204T7, D5244T11, D5244T15
- Volvo S80 (2007–)2015Engine B4164T, B6304T4, B6324S4, B6324S5, D4162T only
- Volvo V40 (2013–)2013–2014All engines except: D5204T4, D5204T6
- Volvo V40 (2013–)2015All engines except: B4204T11, D4204T14, D5204T6
- Volvo V40 Cross Country (2013–)2013–2014All engines except: D5204T4, D5204T6
- Volvo V40 Cross Country (2013–)2015All engines except: B4204T11, D4204T14, D5204T6
- Volvo V60 (2011–)2011All engines except: D5204T2, D5244T10
- Volvo V60 (2011–)2012All engines except: D5204T3, D5244T11, D5244T15
- Volvo V60 (2011–)2013All engines except: D5204T3, D5204T7, D5244T11, D5244T15, D5244T17, D82PHEV
- Volvo V60 (2011–)2014Engine B4164T, B4164T2, B4164T3, B4204T7, B5204T8, B5204T9, B5254T12, B6304T4, D4162T only
- Volvo V60 (2011–)2015Engine B4164T, B4164T2, B4164T3, B5204T9, B5254T12, B6304T3, B6304T4, B6304T5, D4162T only
- Volvo V60 Cross Country (2015–)2015
- Volvo V70 (2008–)2008–2009Engine B6304T2, B6324S only
- Volvo V70 (2008–)2010Engine B4204T6, B6304T2, B6324S, B6324S2 only
- Volvo V70 (2008–)2011Engine B4164T, B4204T6, B4204T7, B6304T4, B6324S5 only
- Volvo V70 (2008–)2012All engines except: B5254T10, D5204T3, D5244T11, D5244T15
- Volvo V70 (2008–)2013All engines except: D5204T3, D5204T7, D5244T11, D5244T15, D5244T17
- Volvo V70 (2008–)2014Engine B4164T, B4164T2, B4204T7, B5204T9, B6304T4, B6324S5, D4162T only
- Volvo V70 (2008–)2015Engine B4164T, B4164T2, B5204T9, B6304T4, D4162T only
- Volvo XC60 (2009–)2009Engine B6304T2 only
- Volvo XC60 (2009–)2010All engines except: D5244T10, D5244T14, D5244T16
- Volvo XC60 (2009–)2011All engines except: D5204T2, D5244T10, D5244T16
- Volvo XC60 (2009–)2012All engines except: D5204T3, D5244T11, D5244T15, D5244T17
- Volvo XC60 (2009–)2013–2014Engine B4204T7, B6304T4, B6324S4, B6324S5 only
- Volvo XC60 (2009–)2015Engine B4204T7, B5204T9, B5254T12, B5254T14, B6304T4, B6324S4, B6324S5 only
- Volvo XC70 (2008–)2008Engine B6324S only
- Volvo XC70 (2008–)2009Engine B6304T2, B6324S only
- Volvo XC70 (2008–)2010Engine B6304T2, B6324S, B6324S2 only
- Volvo XC70 (2008–)2011–2015Engine B6304T4, B6324S4, B6324S5 only
- Volvo XC90 (2003–)2007–2010Engine B6324S only
- Volvo XC90 (2003–)2011–2014Engine 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, as part of the adaptive cruise control function. The code is set when one of the input signals from the CEM or the FSM is lost. The brake support for collision risk then stops working. Although the fault is named a sequence counter problem, the code concerns a missing signal.
Possible causes
- The fault is in the forward sensing module (FSM)
- The fault is in the central electronic module (CEM)
- Open circuit in the communication cable
- Communication cable short-circuited to ground or to voltage
- Contact resistance, oxidation, open circuit or short-circuit in the connections
- The software in the engine control module has not been upgraded
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 CEM and remedy them first. The code in the engine control module is then a follow-on fault.
- 3Check that the connectors in the CAN network between the engine control module, the FSM and the CEM are secure and clean. Look for loose or chafed wiring.
- 4Have a workshop check whether the engine control module software needs upgrading, as this requires programming.
- 5Do not replace the CEM for a CAN fault unless a workshop has confirmed an internal fault in it.
Symptoms you may notice4
- Message in the display
- Warning symbol and message in the display
- Cruise control cannot be engaged
- Cruise control does not hold the set speed or disengages
What the fault can affect1
- Brake support for collision risk is lost
General guidance for car owners. Diagnosis on the car can point to a different cause.