Hva betyr feilkode CEM-DF04?

Diagnose og feilkodedefinisjon for CEM-DF04 (Volvo C30 (2007–2013), Volvo C30 Electric (2011–2013), Volvo C70 (2006–2013)). Bestill reparasjon hos OBD Tuning.

VOLVO

CEM-DF04 - CAN-L, low speed network. Signal too low

System

Sentral elektronikk (CEM)

Volvo-modeller feilkoden gjelder for

Feilkoden har ulik betydning avhengig av modell, årsmodell eller motor. Velg betydningen som gjelder din bil.

Gjelder følgende modeller:

10 modeller

C30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), S60 (2001–2009), S80 (1999–2006), V50 (2004–2013), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)

Vis modeller per årsmodell og motor (10)

Hva betyr feilkoden?

The CEM detects a short to earth on CAN L in the low speed network, and the signal becomes too low. Communication between the control modules can then break down, and central locking and the radio may be affected. The fault most often lies in the cable or a connector in the network.

Mulige årsaker

Short to earth on the CAN L wire in the low speed network, for example where the insulation has worn through
Contact resistance in the connections in the network

Hva du kan gjøre

1Read the fault codes from every control module you can reach, and note which ones also show communication faults
2Gently flex the cable harness and tug the connectors with the ignition on. If the communication faults change, that shows where in the network the fault is
3Use a multimeter to check that the CAN L wire has no contact with earth or the body along its length
4Check the connectors on the CAN network for loose connections, corrosion and moisture
5Check that the harness is not chafed or worn against the body, especially at grommets and sharp edges
6The CEM should not be replaced for a CAN fault unless a workshop has confirmed an internal fault in the CEM

Symptomer du kan merke2

The central locking does not work at all
Radio interference

Generell veiledning for bileiere. Feilsøking på bilen kan peke på en annen årsak.

VOLVO

CEM-DF04 - CAN-L, low speed network. Signal too low

System

Sentral elektronikk (CEM)

Volvo-modeller feilkoden gjelder for

Feilkoden har ulik betydning avhengig av modell, årsmodell eller motor. Velg betydningen som gjelder din bil.

Gjelder følgende modeller:

10 modeller

Vis modeller per årsmodell og motor (10)

Hva betyr feilkoden?

Mulige årsaker

Short to earth on the CAN L wire in the low speed network, for example where the insulation has worn through
Contact resistance in the connections in the network

Hva du kan gjøre

1Read the fault codes from every control module you can reach, and note which ones also show communication faults
2Gently flex the cable harness and tug the connectors with the ignition on. If the communication faults change, that shows where in the network the fault is
3Use a multimeter to check that the CAN L wire has no contact with earth or the body along its length
4Check the connectors on the CAN network for loose connections, corrosion and moisture
5Check that the harness is not chafed or worn against the body, especially at grommets and sharp edges
6The CEM should not be replaced for a CAN fault unless a workshop has confirmed an internal fault in the CEM

Symptomer du kan merke2

The central locking does not work at all
Radio interference

Generell veiledning for bileiere. Feilsøking på bilen kan peke på en annen årsak.

CEM-DF04 - CAN-L, low speed network. Signal too low

Volvo-modeller feilkoden gjelder for

CAN-L, low speed network. Signal too low

CAN-L, low-speed network. Signal too low. Intermittent fault

Gjelder følgende modeller:

Hva betyr feilkoden?

Mulige årsaker

Hva du kan gjøre

Symptomer du kan merke2

CEM-DF04 - CAN-L, low speed network. Signal too low

Volvo-modeller feilkoden gjelder for

CAN-L, low speed network. Signal too low

CAN-L, low-speed network. Signal too low. Intermittent fault

Gjelder følgende modeller:

Hva betyr feilkoden?

Mulige årsaker

Hva du kan gjøre

Symptomer du kan merke2