VOLVO
CPM-B12B215 - AUX Heater Coolant Diverter Valve. General Electrical Failures. Circuit short to battery or open
System
Forbrenningsvarmer (CPM)
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Hva betyr feilkoden?
The combustion preheater module (CPM) measures the resistance across the coolant diverter valve for the auxiliary heater. The fault is set by an electrical fault in the valve, for example a short to supply voltage or an open circuit. The heater's function is then blocked.
Mulige årsaker
- Damaged cable to the distribution valve
- Damaged connector
- Distribution valve shorted to supply voltage
- Damaged distribution valve
Hva du kan gjøre
- 1Check the cable to the diverter valve visually for any damage
- 2Check the connector at the diverter valve: it should be secure and free from oxidation
- 3Use a multimeter to check that the cable carries no voltage when the heater is off; if it does, the cable is shorted to positive
- 4Clear the code and start the heater again to see whether the fault returns
- 5If the fault is not fixed, have a workshop replace the diverter valve
Symptomer du kan merke5
- The parking heater does not work
- The rear of the cabin is not warm enough
- The front of the cabin is not warm enough
- The heater does not work
- The cabin heats up slowly
Hva feilen kan påvirke1
- The heater's function is blocked
Generell veiledning for bileiere. Feilsøking på bilen kan peke på en annen årsak.