VOLVO
CPM-B1D2211 - Coolant Temperature Sensor. General Electrical Failures. Circuit short to ground
System
Forbrenningsvarmer (CPM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
9 modellerS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Hva betyr feilkoden?
The CPM reads the DC voltage coming from the heater's coolant temperature sensor. The fault is set when the signal is shorted to earth, which gives a signal that is too low. The causes may be an incorrect coolant level, a damaged coolant pump or cooling circuit, or a damaged sensor or cable.
Mulige årsaker
- Coolant level outside the permitted range
- Damaged coolant pump
- Damaged cooling circuit
- Damaged coolant temperature sensor
- The cable between the CPM and the coolant temperature sensor is shorted to earth
- Contact resistance, oxidation or loose connections
Hva du kan gjøre
- 1Check the coolant level and mixture, and top up with the correct mixture if needed
- 2Check that the coolant hoses are not pinched or deformed
- 3Check the cable to the coolant temperature sensor visually for damage and make sure the insulation is intact
- 4Use a multimeter to check that the cable has no contact with earth (the body); if it does, the cable is shorted
- 5If the fault remains, have a workshop check the coolant pump, the cooling circuit and the sensor, and drain, refill and bleed the system if needed
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 påvirke2
- The heater's function is blocked
- Activation is blocked until the fault is repaired and the code is cleared
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