VOLVO
CEM-U004400 - Extended CAN Communication Bus (-) High. General Failure Information. No sub type information
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 fault code means that the negative (high) wire in the extended CAN network has contact with voltage. The network is the part where the control modules for the park assist camera, blind spot system and cross traffic alert talk to the rest of the car. A wire lying against voltage disturbs the communication, and the systems may stop working.
Mögliche Ursachen
- A chafed spot in the wiring, or a pinched wire, lets the negative extended-network wire touch voltage
Was Sie tun können
- 1Read and note the fault codes in the control modules, clear them and road test the car
- 2Switch the ignition off and look for chafing, pinch damage and loose or corroded connectors in the extended-network wiring
- 3Use a multimeter to confirm the negative wire has no contact with voltage. Twist and wiggle the wiring during the test
- 4If the fault remains, have a workshop with diagnostic equipment measure the voltage. Replace a control module only once testing has shown 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.