VOLVO
SUM-0172 - Keypad, COMFORT indication. Signal too high
System
Suspension Module (SUM)
Volvo models this fault code applies to
Applies to the following models:
4 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007)
What does this fault code mean?
The signal for the COMFORT indication in the keypad is too high. The fault lies in the indication wire or in the keypad, and the Four-C function is blocked.
Possible causes
- Open circuit in the wire for the indication in the keypad
- Open circuit in the ground wire for the indication in the keypad
- Short to voltage in the wire for the indication in the keypad
- Defective keypad
What you can do
- 1Check the connectors at the keypad and at the control module for oxidation
- 2Use a multimeter to check that the indication wire and its ground wire are not broken, and that the indication wire has no contact with positive voltage
- 3If you have a diagnostic tool: read live data for the COMFORT indication and see whether the value changes when you change mode
- 4If the wiring is intact, have a workshop replace the keypad
Symptoms you may notice3
- The general warning lamp lights
- Message in the display
- Four-C does not work
What the fault can affect1
- The Four-C function is blocked
General guidance for car owners. Diagnosis on the car can point to a different cause.