VOLVO
SUM-U010000 - Lost Communication With Engine control module. General Failure Information. No sub type information
System
Suspension Module (SUM)
Volvo models this fault code applies to
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
The SUM regularly receives a torque message from the engine module (ECM) over CAN. The fault code is set when the expected message is missing, which limits the Four-C function.
Possible causes
- Contact resistance or oxidation in the connectors
- A break in one of the wires in the CAN network
- One of the wires in the CAN network is short-circuited to ground
- One of the wires in the CAN network is short-circuited to voltage
- The wires in the CAN network are short-circuited to each other
What you can do
- 1Read the fault codes in all control modules and note them; communication faults often occur together
- 2Clear the fault codes and road test; some codes only disappear in the next operating cycle, so check again after a while
- 3Check that the relevant fuses are intact; their locations are in the owner's manual
- 4Examine the connectors and wiring in the CAN network for loose connections, chafing and pinch damage
- 5Have a workshop with diagnostic equipment check communication with the engine control module and the rest of the CAN network
Symptoms you may notice1
- No noticeable symptoms for the driver
What the fault can affect1
- The Four-C function is limited
General guidance for car owners. Diagnosis on the car can point to a different cause.