VOLVO
CEM-U004400 - Extended CAN Communication Bus (-) High. General Failure Information. No sub type information
System
Sentral elektronikk (CEM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
2 modellerV40 (2013–), V40 Cross Country (2013–)
Vis modeller per årsmodell og motor (2)
Hva betyr feilkoden?
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.
Mulige årsaker
- A chafed spot in the wiring, or a pinched wire, lets the negative extended-network wire touch voltage
Hva du kan gjøre
- 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
Symptomer du kan merke3
- Park assist camera does not work
- Blind spot monitoring (BLIS) does not function
- Cross Traffic Alert (CTA) does not work
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