VOLVO
SUM-0207 - Control module
System
Suspension Module (SUM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
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 suspension module (SUM) has found that it cannot control the power supply to the solenoids in the Four-C system. The fault code is stored and Four-C control is switched off until the fault is put right.
Possible causes
- Short circuit to ground in the supply cable that feeds one of the solenoids
- Short circuit to ground inside one of the solenoids
- Damaged control module
What you can do
- 1Read the fault code, clear it and road test the car to see whether it returns
- 2Check that the connectors to the suspension module and to the solenoids are fully seated and not corroded
- 3Look for chafed or pinched wiring at the solenoids, and check whether any wire has come into contact with the body
- 4Use a multimeter to check that the solenoid wiring has no contact with ground, with the ignition switched off
- 5If the wiring and solenoids are sound: have a workshop replace the suspension control module
Symptoms you may notice3
- General warning lamp on
- Message in the text display
- Four-C does not work
What the fault can affect1
- Four-C control is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.