VOLVO
CEM-U001700 - Medium Speed 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 medium-speed CAN bus has contact with voltage. The bus links the control modules in the car together, and a wire lying against voltage stops messages from getting through properly. The instrument lighting, gauges, central locking and climate control may therefore work poorly or not at all.
Mulige årsaker
- Chafed or pinched wiring lets the negative MS-CAN wire touch a live wire
Hva du kan gjøre
- 1Read the fault codes from all control modules, clear them and road test the car to see whether the code returns
- 2Switch the ignition off and inspect the negative wire for chafing, pinch damage and loose connectors near live cables
- 3With the ignition on, use a multimeter to confirm the negative wire has no contact with voltage. Move the wiring during the test
- 4If the code returns, have a workshop with diagnostic equipment check the bus. Replace the CEM only if testing shows it is faulty
Symptomer du kan merke4
- Instrument or button lighting does not work
- Gauges in the instrument panel do not work properly
- Central locking cannot lock or unlock the car
- Temperature control and air conditioning do not work
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