VOLVO
CEM-U300801 - Control Module Ground "A". General Failure Information. General electrical failure
System
Sentral elektronikk (CEM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
4 modellerS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Vis modeller per årsmodell og motor (4)
Hva betyr feilkoden?
The CEM has two earth connections, one for electronics and one for power. The fault is stored when the electronics earth has no connection to the car body, which can make some functions, such as the instrument panel, stop working.
Mulige årsaker
- Contact resistance or oxidation in the terminals
- Open circuit in the earth cable
Hva du kan gjøre
- 1Check the earth connection at the module and at the body: it should be tight and free from rust and dirt
- 2Follow the earth cable from the module to the body and look for breaks, chafing and loose connectors
- 3Use a multimeter to check that the earth cable is connected to the body; if it is not, have a workshop repair the connection
- 4Reconnect connectors and components, switch the ignition on and check that the instrument panel works as it should
- 5Clear the code and road test; if it returns, have a workshop check the body earth connection
Symptomer du kan merke3
- The combined instrument panel does not work
- The front seat power adjustment does not work
- The passenger compartment lighting does not work
Hva feilen kan påvirke3
- The function turns off during the driving cycle in which the fault is detected
- If the fault stays present over many driving cycles the function is switched off permanently
- Erasing the trouble codes and starting a new driving cycle resets the function
Generell veiledning for bileiere. Feilsøking på bilen kan peke på en annen årsak.