VOLVO
DEM-U012900 - Lost Communication With Brake System Control Module. General Failure Information. No sub type information
System
Firehjulsdrift (DEM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
1 modellXC90 (2003–)
Vis modeller per årsmodell og motor (6)
- Volvo XC90 (2003–)2005Kun girkasse: TF-80SC AWD
- Volvo XC90 (2003–)2006Kun motor: B8444S · Kun girkasse: TF-80SC AWD
- Volvo XC90 (2003–)2007–2010Kun motor: B6324S, B8444S · Kun girkasse: TF-80SC AWD
- Volvo XC90 (2003–)2011Kun motor: B6324S5, B8444S · Kun girkasse: TF-80SC AWD
- Volvo XC90 (2003–)2012Kun motor: B6324S5 · Kun girkasse: TF-80SC AWD
- Volvo XC90 (2003–)2013–2014Kun motor: B6324S5, D5244T18 · Kun girkasse: TF-80SC AWD
Hva betyr feilkoden?
The four-wheel drive control module (DEM) gets ongoing data from the brake control module (BCM) over the CAN network, including wheel speed. If the signal from the brake control module is missing or faulty, the code is set. The fault may lie in the brake control module, in the communication cable, or in the connectors between them.
Mulige årsaker
- Damaged brake control module (BCM)
- Damaged CAN network
- Open circuit in the communication cable
- Communication cable shorted to ground
- Communication cable shorted to voltage
- Contact resistance or oxidation in the connections
Hva du kan gjøre
- 1Read off the fault codes in the brake control module first and remedy them before clearing this code
- 2Check that the fuses are intact; their locations are in the owner's manual or on the fuse box cover
- 3Check the connectors and wiring in the CAN network for oxidation, loose connections and chafing
- 4If you have a diagnostic tool, check that the brake control module responds when you connect the tool
- 5Test drive the vehicle to see if the fault returns, and note whether the brakes feel different
- 6The braking system is safety-critical: if the fault remains or the brakes feel different, have a workshop check the brake control module and the CAN network
Symptomer du kan merke1
- Four-wheel drive does not work
Hva feilen kan påvirke1
- Four-wheel drive is disengaged
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