VOLVO
SUM-0023 - Acceleration sensor, suspension right front. Signal missing
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)
Show models by year and engine (7)
What does this fault code mean?
No signal comes from the acceleration sensor on the right front shock absorber. The sensor gives the suspension control module information about the vertical movement of the wheel, so that information is missing.
Possible causes
- Open circuit in the signal cable
- Open circuit in the ground lead
- The signal cable has contact with the power supply cable
- Poor contact in the connections
- Defective acceleration sensor
What you can do
- 1Check the connectors at the sensor and at the control module for loose, corroded or chafed wires
- 2Use a multimeter to check that the signal and ground leads from the sensor on the right front shock absorber are continuous, meaning there is no break
- 3If you have a diagnostic tool: read live data for the right front sensor; if the value is missing or does not change at all, the signal is absent
- 4Check that the suspension system fuses are intact; the owner's manual shows where they are
- 5If the wiring is intact, the sensor is probably defective. Have a workshop replace it
Symptoms you may notice3
- The general warning lamp lights
- Message in the 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.