VOLVO
CEM-5F31 - Coolant temperature sensor Open circuit or short circuit to supply
System
Sentral elektronikk (CEM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
5 modellerS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Vis modeller per årsmodell og motor (10)
- Volvo S60 (2001–2009)2001, 2005–2009
- Volvo S60 (2001–2009)2002Alle motorer unntatt: D5244T2
- Volvo S60 (2001–2009)2003Alle motorer unntatt: B5244S6, D5244T2
- Volvo S60 (2001–2009)2004Alle motorer unntatt: B5244S6, B5254T4, D5244T2
- Volvo S80 (1999–2006)1999–2002, 2005–2006
- Volvo S80 (1999–2006)2003–2004Alle motorer unntatt: B5254T2
- Volvo V70 (2000–2008)2000–2003, 2005–2008
- Volvo V70 (2000–2008)2004Alle motorer unntatt: B5254T4
- Volvo V70 XC / XC70 (2001–2007)2001–2007
- Volvo XC90 (2003–)2003–2015
Hva betyr feilkoden?
The central electronic module (CEM) monitors the water temperature sensor in the heater. If the circuit is broken or has contact with voltage supply, the control unit treats this as a fault and sets the code. The fault shows when the heater is active, and it causes poor heating in the passenger compartment.
Mulige årsaker
- Open circuit in the signal wire or a short-circuit to voltage supply in it
- Open circuit in the signal ground wire
- Contact resistance in the control unit connector
- Defective water temperature sensor
Hva du kan gjøre
- 1Read and note the code, clear it and start the heater to see whether the fault returns
- 2If you have a diagnostic tool, read the water temperature in live data and compare it with the engine temperature once the engine is warm
- 3Check the connectors at the control unit and at the water temperature sensor for loose connections and corrosion
- 4If the heater works again after the connectors are repaired, the fault was probably poor contact
- 5Use a multimeter to check the water temperature sensor wires for breaks or contact with voltage; if they are intact and the fault remains, a workshop should replace the sensor
Symptomer du kan merke1
- Poor heating in the passenger compartment
Generell veiledning for bileiere. Feilsøking på bilen kan peke på en annen årsak.