VOLVO
CEM-U021400 - Lost Communication With Keyless vehicle module. General Failure Information. No sub type information
System
Zentralelektronik (CEM)
Volvo-Modelle, für die dieser Fehlercode gilt
Dieser Fehlercode hat je nach Modell, Modelljahr oder Motor unterschiedliche Bedeutungen. Wählen Sie die Bedeutung, die für Ihr Fahrzeug gilt.
Gilt für folgende Modelle:
7 ModelleS60 (2011–), S80 (2007–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Was bedeutet der Fehlercode?
The fault code means that the control module storing the fault has lost, or has disturbed, its communication with the keyless vehicle module (KVM). Locking with the remote and the keyless function may then fail. Tire pressure warning can also be affected. The fault concerns the communication in the network.
Mögliche Ursachen
- Supply voltage to the keyless vehicle module (KVM) is missing
- Break in the KVM ground lead
- Contact resistance in the connections
- Open or shorted CAN wiring
- A module not intended for the car, such as a used unit with other software or hardware
Was Sie tun können
- 1Look for the KVM fuse in the rear relay and fuse centre and confirm it is intact
- 2Check the power wire to the KVM for breaks and shorts to ground, and the ground wire for breaks
- 3Check the body ground connection for contact resistance and oxidation
- 4If the fault returns, have a workshop check the CAN wiring. Replace the CEM only if testing shows it is damaged
Symptome, die Sie bemerken können3
- Remote control cannot lock or unlock the car
- Keyless function does not work or is reduced
- Tire pressure warning with no function
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.