VOLVO
CEM-4F30 - Battery temperature. Signal too high
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 calculates the battery temperature from the battery temperature sensor. If the sensor circuit is shorted to supply voltage or has a break, the code is set. The battery may then discharge, and the battery temperature may be shown wrongly.
Mulige årsaker
- Contact resistance in the control module connector
- An open circuit in the signal ground wire
- An open circuit in the signal wire, or the signal wire is shorted to supply voltage
- A damaged battery temperature sensor
Hva du kan gjøre
- 1With a diagnostic tool, follow the battery temperature in live data and check that the value 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 has no break or short to supply voltage
- 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 wrongly
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