VOLVO
ECM-U100386 - System Timer. Bus Signal / Message Failures. Signal invalid
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS60 (2011–), S80 (2007–), V60 (2011–), V70 (2008–), XC60 (2009–)
Show models by year and engine (12)
- Volvo S60 (2011–)2011Engine B4204T6, B4204T7 only
- Volvo S60 (2011–)2012–2014Engine B4204T7 only
- Volvo S80 (2007–)2010Engine B4204T6 only
- Volvo S80 (2007–)2011–2014Engine B4204T6, B4204T7 only
- Volvo V60 (2011–)2011Engine B4204T6, B4204T7 only
- Volvo V60 (2011–)2012–2014Engine B4204T7 only
- Volvo V70 (2008–)2010Engine B4204T6 only
- Volvo V70 (2008–)2011Engine B4204T6, B4204T7 only
- Volvo V70 (2008–)2012–2014Engine B4204T7 only
- Volvo XC60 (2009–)2010Engine B4204T6 only
- Volvo XC60 (2009–)2011–2012Engine B4204T6, B4204T7 only
- Volvo XC60 (2009–)2013–2015Engine B4204T7 only
What does this fault code mean?
The engine control module (ECM) should receive a real-time clock time signal from the central electronic module (CEM), but the signal has not reached the ECM some time after the ignition is switched on. The code may be caused by interference in the CAN network or by a damaged CEM.
Possible causes
- Interference in the CAN network
- Damaged central electronic module (CEM)
What you can do
- 1Check that the fuses are intact. Read the fault codes in the engine control module and the CEM, and remedy the other faults first.
- 2If the code returns, have a workshop read out and check the CEM and the CAN network, as this requires diagnostic equipment.
- 3After a repair, check that the code does not come back on a new drive.
Symptoms you may notice1
- No noticeable symptoms for the driver
General guidance for car owners. Diagnosis on the car can point to a different cause.