VOLVO
CEM-B1D1783 - Battery Backed Sounder. Bus Signal / Message Failures. Value of signal protection calculation incorrect
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 control module (CEM) exchanges messages with the alarm siren over the LIN bus, and the code is set when a message from the siren is incorrect. The fault can cause false alarms or stop the alarm from sounding, and poor contact in the connections is a common cause.
Mulige årsaker
- Poor contact, oxidation or high resistance in the connections
- Damaged siren
Hva du kan gjøre
- 1Read and clear the code, then arm the alarm and see whether the fault returns
- 2Check that the connectors at the siren connections are fully seated and free from oxidation
- 3Look for loose or damaged connectors in the wiring harness to the siren
- 4Use a multimeter to check whether the wires to the siren touch ground or voltage with the ignition off
- 5If the fault remains, have a workshop with diagnostic equipment check the siren and the bus
Symptomer du kan merke3
- The alarm gives false alarms
- The alarm does not sound, and no visible or audible signal appears
- Yellow warning symbol and text message in the display
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