VOLVO
CEM-8F23 - Relay, windshield wiper. Signal too high. Intermittent fault
System
Central Electronic Module (CEM)
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:
5 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
What does this fault code mean?
The fault is intermittent: the wiper relay registered a signal that was too high on an earlier occasion, but the fault is not present now. It can be caused by a damaged relay with a short in its coil, and then activating the wipers may stop working.
Possible causes
- Defective relay with a short in its coil
What you can do
- 1Clear the code and check whether it returns; an intermittent fault can be a temporary disturbance
- 2Check that the wiper relay is seated properly in its socket and that the contacts are clean
- 3Check that the fuse for the wipers is intact
- 4Activate the wipers: if they work now, the fault has occurred earlier but is not active at the moment
- 5If the fault returns, have a workshop replace the wiper relay and check the wiring
Symptoms you may notice1
- The windscreen wiper motor does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.