VOLVO
CEM-B108786 - LIN Bus "A". Bus Signal / Message Failures. Signal invalid
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 CEM talks to the light switch module (LSM), the left steering wheel buttons (SWSL) and the steering wheel module (SWM) over a shared LIN bus. The fault shows that messages on the bus are corrupted, so the connected functions may work erratically.
Mulige årsaker
- Loose, corroded or high-resistance connections in the connectors
- The light switch module (LSM) is damaged
- The steering wheel module (SWM) is damaged
- The left steering wheel buttons (SWSL) are damaged
Hva du kan gjøre
- 1Read off and note the code, clear it and run the lights, indicators, wipers and washers to see which functions do not work
- 2Check that the fuses for the lighting and wiper functions are intact
- 3Check that the connectors to the light switch module and the steering wheel buttons are fully engaged and not corroded
- 4Use a multimeter (ignition off, connectors unplugged) to check that the LIN wire has no connection to ground or to battery positive
- 5If you have a diagnostic tool, read the light switch and steering wheel button status in live data and check that they change when you use them
- 6If the fault remains, have a workshop check the control modules on the bus
Symptomer du kan merke5
- The headlights do not work
- Front or rear turn signals do not work
- The windscreen wiper or windscreen washer does not work
- The trip computer does not work correctly
- The cruise control cannot be engaged
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