DTC P1F1C-11: Water Cooling Condenser Refrigerant Temperature Sensor Circuit Short to Ground [08/2023 - ]: Description

The water cooling condenser refrigerant temperature sensor (No. 2 air conditioning thermistor assembly) is installed on the No. 1 cooler refrigerant discharge hose to detect the refrigerant gas temperature from the heater and accessory assembly and is used to control the air conditioning system. The resistance of the water cooling condenser refrigerant temperature sensor (No. 2 air conditioning thermistor assembly) changes in accordance with the refrigerant gas temperature from the heater and accessory assembly. Resistance increases as the refrigerant gas temperature drops and decreases as the temperature rises. The heat pump ECU assembly outputs a voltage to the water cooling condenser refrigerant temperature sensor (No. 2 air conditioning thermistor assembly) and reads voltage changes that result from the changes in the resistance of the water cooling condenser refrigerant temperature sensor (No. 2 air conditioning thermistor assembly).