VOLVO
CEM-DE23 - Communication with the trailer module (TRM). Signal missing
System
Sentral elektronikk (CEM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
5 modellerC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Hva betyr feilkoden?
The central module receives no communication from the trailer module (TRM), so functions controlled by it stop working. The cause may be a missing supply or earth to the module, contact resistance at connections, a break in the CAN low-speed network, or a module that is not intended for this car.
Mulige årsaker
- No voltage supply to the trailer module (TRM)
- Open circuit in the earth lead to the trailer module (TRM)
- Contact resistance at the connections
- Open circuit in the CAN low-speed network wiring to the trailer module (TRM)
- The trailer module does not belong to this car, e.g. a used unit with other software
- Several fault codes for communication with other modules on the low-speed network point to a common fault on the CAN network
Hva du kan gjøre
- 1Check that the main fuse at the battery and the fuse for the trailer module are intact, using the owner's manual
- 2With a multimeter, check that the supply wire to the trailer module has no break and no contact with ground
- 3With a diagnostic tool, try to read the module ID. If it can be read, CAN communication is probably fine and the fault may be temporary
- 4If the fault remains, have a workshop check the earth point and replace the module if needed
Symptomer du kan merke1
- Functions controlled by the trailer module do not work
Generell veiledning for bileiere. Feilsøking på bilen kan peke på en annen årsak.