VOLVO
DEM-U012900 - Lost Communication With Brake System Control Module. General Failure Information. No sub type information
System
Allradantrieb (DEM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
1 ModellXC90 (2003–)
Modelle nach Baujahr und Motor anzeigen (6)
- Volvo XC90 (2003–)2005Nur Getriebe: TF-80SC AWD
- Volvo XC90 (2003–)2006Nur Motor: B8444S · Nur Getriebe: TF-80SC AWD
- Volvo XC90 (2003–)2007–2010Nur Motor: B6324S, B8444S · Nur Getriebe: TF-80SC AWD
- Volvo XC90 (2003–)2011Nur Motor: B6324S5, B8444S · Nur Getriebe: TF-80SC AWD
- Volvo XC90 (2003–)2012Nur Motor: B6324S5 · Nur Getriebe: TF-80SC AWD
- Volvo XC90 (2003–)2013–2014Nur Motor: B6324S5, D5244T18 · Nur Getriebe: TF-80SC AWD
Was bedeutet der Fehlercode?
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.
Mögliche Ursachen
- 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
Was Sie tun können
- 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
Symptome, die Sie bemerken können1
- Four-wheel drive does not work
Was der Fehler beeinflussen kann1
- Four-wheel drive is disengaged
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.