VOLVO
CEM-U001600 - Medium Speed 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 negative (low) wire in the medium-speed CAN bus has contact with ground, meaning the car body. The bus is the network the control modules use to exchange information, and a grounded wire disturbs those messages. The instrument and button lighting, gauges, central locking and climate control can then stop working as they should.
Mulige årsaker
- Chafed or pinched wiring lets the negative MS-CAN wire touch the car body
Hva du kan gjøre
- 1Read and note the fault codes in the control modules, clear them and road test the car to see whether the code returns
- 2Switch the ignition off and check the negative wire for chafing and pinch damage, especially where it can touch body metal
- 3With the battery negative lead disconnected, use a multimeter to confirm the wires have no contact with ground. Wiggle connectors 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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