VOLVO
SUM-U201011 - Switch Illumination. General Electrical Failures. Circuit short to ground
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 supplies and grounds the lighting in the Four-C switches and monitors the voltage to the lighting. The fault code is set when the voltage is too low, which can mean the lighting supply wire is short-circuited to ground.
Possible causes
- The lighting supply wire has a short circuit to ground
- Damaged Four-C switch
What you can do
- 1Read the code, clear it and check whether it comes back
- 2Check that the relevant fuses are intact; their locations are in the owner's manual
- 3Check that the connector at the Four-C switches is firm and clean
- 4Inspect the wiring to the switches for chafing and pinch damage
- 5With the switches disconnected, use a multimeter to check that the lighting supply wire has no contact with ground
- 6If the fault returns, have a workshop with diagnostic equipment check the switches and the wiring
Symptoms you may notice1
- The lighting in the Four-C switches does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.