VOLVO
SUM-U201663 - Control Module Main Software. Algorithm Based Failures. Circuit / component protection time-out
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?
An algorithm fault in the main program of the SUM has caused the program to miss its allotted time, a so-called time-out. The fault is a software fault in the control module.
Possible causes
- Software fault
What you can do
- 1Has the control module recently been programmed? Tell the workshop if you take the car in
- 2Read and note the code, clear it and road test to see whether it comes back
- 3If the fault comes back, have a workshop program the SUM with new software and calibrate it
Symptoms you may notice2
- A message appears in the information display
- The Four-C function does not work
What the fault can affect1
- The Four-C function is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.