VOLVO
CEM-4F31 - Battery temperature. Signal too low
System
Sentral elektronikk (CEM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
5 modellerC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Hva betyr feilkoden?
The CEM treats it as a fault when the signal wire from the battery temperature sensor is shorted to ground. The code is then set, and the battery may discharge. The battery temperature may also be shown incorrectly.
Mulige årsaker
- The signal wire is shorted to ground
- A damaged battery temperature sensor
Hva du kan gjøre
- 1With a diagnostic tool, if you have one, check that the battery temperature in live data is reasonable
- 2Check that the connectors at the battery and at the CEM are seated and not corroded
- 3Use a multimeter to check that the signal wire from the battery sensor is not shorted to ground
- 4If the fault remains, have a workshop replace the battery temperature sensor
- 5After the work, clear the code and check that the battery charges normally
Symptomer du kan merke1
- The battery discharges
Hva feilen kan påvirke1
- The battery temperature is shown incorrectly
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