VOLVO
CEM-B109719 - Heated Windshield Relay. General Electrical Failures. Circuit current above threshold
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 controls the front windscreen defroster through a relay. The fault shows that the relay cannot be activated when the defroster is switched on with the engine running, which suggests the control signal to the relay is shorted to voltage.
Mulige årsaker
- The control wire for the defroster relay is shorted to voltage
Hva du kan gjøre
- 1Read off and note the code, clear it and check whether it returns when you switch the defroster on with the engine running
- 2Check that the fuses for the front windscreen defroster are intact
- 3Check that the connectors in the defroster wiring harness are fully engaged and not damaged
- 4Use a multimeter (ignition off, connector unplugged) to check that the relay control wire is not at battery voltage
- 5If you have a diagnostic tool, activate the front windscreen defroster with the tool and check that it starts
- 6If the fault remains, have a workshop check the relay and the wiring
Symptomer du kan merke1
- Windscreen defog and defrost does not work
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