VOLVO
CEM-U025200 - Lost Communication With Lighting Control Module - Rear "B". 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 its link to a module on the network; although the code is named after the rear lighting module "B", it concerns the trailer module (TRM). Trailer lamps may then work wrongly. The fault concerns the network rather than one individual control module.
Mögliche Ursachen
- No voltage supply to the trailer module (TRM)
- Broken ground wire to the TRM
- Poor contact 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
- 1Check the supply voltage and body ground point to the TRM, and confirm the connectors are secure
- 2Check the ground wire to the TRM for breaks or a short to voltage
- 3Check the trailer hitch connector 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 können1
- Trailer lamps do not work correctly
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.