VOLVO
CEM-DE1A - Communication with DEM control module. Signal missing
System
Zentralelektronik (CEM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
5 ModelleC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Modelle nach Baujahr und Motor anzeigen (5)
Was bedeutet der Fehlercode?
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.
Mögliche Ursachen
- 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
Was Sie tun können
- 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
Symptome, die Sie bemerken können2
- Four-wheel drive does not work
- Text message and warning symbol in the display
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.