VOLVO
CEM-U004000 - Extended CAN Communication Bus (+) Low. 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 positive (low) wire in the extended CAN network has contact with ground. The network links the park assist camera, blind spot system and cross traffic alert with the rest of the car. Ground contact on the wire disturbs the signals, and the systems on the network can then stop working.
Mulige årsaker
- Chafed or pinched wiring lets the positive extended-network wire touch ground
Hva du kan gjøre
- 1Read the fault codes in all control modules, clear them and road test the car to see whether the code returns
- 2Switch the ignition off and inspect the positive wire of the extended network for chafing, pinch damage and loose connectors
- 3With the battery negative lead disconnected, use a multimeter to confirm the positive wire has no contact with the car body. Twist and wiggle wiring during the test
- 4If the code returns, have a workshop with diagnostic equipment check the voltage drop in the wires. Replace the CEM only if testing shows 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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