VOLVO
CEM-5F4D - Diagnostic system. Too long
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) has lost contact with the parking heater control unit while the heater is running, because the heater's internal diagnostics do not respond in time. The fault lies in the communication between the two control units. It shows when the heater is active and may stop it from working as it should.
Mulige årsaker
- Contact resistance in the connections
- Open circuit in the communication wire
- Communication wire short-circuited to ground
- Communication wire short-circuited to voltage supply
Hva du kan gjøre
- 1Check whether the fault is limited to the heater or whether other control units also have communication problems
- 2Check the connectors in the communication wire for loose connections and corrosion
- 3Use a multimeter to check that the communication wire has no break and no contact with ground (the body) or voltage
- 4If other control units also have communication problems, a workshop should investigate them
- 5If the fault does not return after the connectors are repaired, it was probably poor contact
Symptomer du kan merke2
- Poor heating in the passenger compartment
- Parking heater does not work
Generell veiledning for bileiere. Feilsøking på bilen kan peke på en annen årsak.