VOLVO
CEM-DE1A - Communication with DEM control module. 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 four-wheel drive module (DEM), so four-wheel drive does not work. A text message and a warning symbol may also show in the display. The cause may be a missing supply or earth, contact resistance at connections, a break in the CAN wiring, or a module that is not intended for this car.
Mulige årsaker
- No voltage supply to the four-wheel drive module (DEM)
- Open circuit in the earth lead to the four-wheel drive module (DEM)
- Contact resistance at the connections
- Open circuit in the CAN low-speed network wiring to the four-wheel drive module (DEM)
- The four-wheel drive 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 the connectors to the four-wheel drive module and look for corrosion or loose connectors
- 2With a multimeter, check that the supply wire to the module has no break and no contact with ground
- 3Also check the earth wire for a break and for a short to voltage
- 4Have a workshop check the CAN wiring and read the module ID, since faults on the CAN network need workshop equipment
Symptomer du kan merke2
- Four-wheel drive does not work
- Text message and warning symbol in the display
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