VOLVO
ECM-U016700 - Lost Communication With Vehicle Immobilizer 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 (27)
- 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–)2011–2013
- Volvo S60 (2011–)2014–2015All engines except: B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5
- Volvo S80 (2007–)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–)2008–2013
- Volvo V70 (2008–)2014–2015All engines except: B4204T11, D4204T5
- Volvo XC60 (2009–)2009–2013
- Volvo XC60 (2009–)2014–2015All engines except: B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5
- Volvo XC70 (2008–)2008–2013
- Volvo XC70 (2008–)2014–2015All engines except: B4204T11, D4204T5
- Volvo XC90 (2003–)2007–2010Engine B6324S only
- Volvo XC90 (2003–)2011–2012Engine B6324S5 only
- Volvo XC90 (2003–)2013–2014All engines except: B5254T9
What does this fault code mean?
The immobilizer is built into the central electronics control module (CEM). Before the engine can start, the engine control module (ECM) checks that the immobilizer code matches the CEM. The code is set when communication between the CEM and the engine control module stops so that this check cannot be made. This can stop the engine from starting.
Possible causes
- Break in the communication between the central electronics control module and the engine control module
- A central electronics control module that is not programmed and has no immobilizer code
- Faulty central electronics control module
- Break in one of the CAN wires
- Short circuit between the CAN wires
- Internal fault in another control module on the same part of the CAN network
What you can do
- 1Read the codes in the central electronics control module first. If codes are stored there, troubleshoot according to them
- 2Check that the fuses are intact and that the battery has good voltage
- 3Check the CAN connections between the engine control module and the central electronics control module for oxidation and loose contacts
- 4Look for chafed wiring. Use a multimeter to check that the CAN wires have no break or short circuit
- 5If no codes are stored in the central electronics control module: have a workshop decide whether it needs programming or replacing
- 6After repair: start the engine and check that the code is not set again
Symptoms you may notice4
- Starter cranks but the engine fails to start
- Message in the text display
- The engine is hard to start and is cranked slowly
- The starter does not crank and there is no click when starting is attempted
General guidance for car owners. Diagnosis on the car can point to a different cause.