VOLVO
CEM-U300801 - Control Module Ground "A". General Failure Information. General electrical failure
System
Zentralelektronik (CEM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
4 ModelleS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Modelle nach Baujahr und Motor anzeigen (4)
Was bedeutet der Fehlercode?
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.
Mögliche Ursachen
- Contact resistance or oxidation in the terminals
- Open circuit in the earth cable
Was Sie tun können
- 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
Symptome, die Sie bemerken können3
- The combined instrument panel does not work
- The front seat power adjustment does not work
- The passenger compartment lighting does not work
Was der Fehler beeinflussen kann3
- 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
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.