VOLVO
CEM-B112B87 - Steering wheel module. Bus Signal / Message Failures. Missing message
Układ
Centralny moduł elektroniczny (CEM)
Modele Volvo, których dotyczy ten kod błędu
Dotyczy następujących modeli:
9 modeliS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Co oznacza ten kod błędu?
The CEM both sends and receives information over the LIN bus, a standardised serial communication method. The code is stored when communication with the steering wheel module (SWM) is lost for a set time. The turn signals, wipers and washer then do not work, and the trip computer may show faults.
Możliwe przyczyny
- Open circuit on the power feed to the steering wheel module (SWM)
- Break in the ground lead to the steering wheel module (SWM)
- Contact resistance in the connections
- Break or short circuit on the LIN bus to the steering wheel module (SWM)
- Damaged steering wheel module (SWM)
- Internal fault in another unit on the same part of the LIN network
Co możesz zrobić
- 1If you have a diagnostic tool: check whether the CEM has other fault codes ending in 86 or 88 and deal with those first, since they point to the LIN bus
- 2Check that the relevant fuses are intact. Their locations are in the owner's manual or on the fuse box cover
- 3Check that the connectors in the steering wheel and the connections to the steering wheel module are secure and not oxidised
- 4If you have a diagnostic tool: read the steering wheel module status in live data and check that it responds
- 5If the fault returns, have a workshop with diagnostic equipment check the LIN bus, the power supply and the steering wheel module
Objawy, które możesz zauważyć5
- Rear turn signal does not work
- Windshield washer does not work
- Trip computer has other problems
- Front turn signal does not work
- Windshield wiper does not work
Ogólne wskazówki dla właścicieli. Diagnostyka na samochodzie może wskazać inną przyczynę.