VOLVO
CEM-U003788 - Extended CAN Communication Bus. Bus Signal / Message Failures. Bus off
System
Zentralelektronik (CEM)
Volvo-Modelle, für die dieser Fehlercode gilt
Gilt für folgende Modelle:
2 ModelleV40 (2013–), V40 Cross Country (2013–)
Modelle nach Baujahr und Motor anzeigen (2)
Was bedeutet der Fehlercode?
The control module on the extended CAN network has received or sent faulty messages and shut off its communication, which is called bus-off. The fault is caused by a short circuit between the CAN wires, and it should be located before any control module is replaced. The park assist camera, blind spot system and cross traffic alert can be affected.
Mögliche Ursachen
- Short circuit between the two CAN wires in the extended network
Was Sie tun können
- 1Read and clear the fault codes in all control modules, road test the car and note whether the code comes back
- 2Switch the ignition off and check the extended-network CAN wires for chafing and pinch damage, especially where they are clamped
- 3With the battery negative lead disconnected, use a multimeter to confirm the two CAN wires have no contact. Twist the harness during the test
- 4If the code returns, have a workshop with diagnostic equipment check the network. Replace the CEM only if testing shows it is faulty
Symptome, die Sie bemerken können3
- Park assist camera does not work
- Blind spot monitoring (BLIS) does not function
- Cross Traffic Alert (CTA) does not work
Allgemeine Hinweise für Fahrzeughalter. Die Diagnose am Fahrzeug kann eine andere Ursache zeigen.