DTC B1417/17: Rear Evaporator Temperature Sensor Circuit: Description

The rear air conditioning harness (rear evaporator temperature sensor) is installed on the evaporator in the rear air conditioning unit to detect the temperature of the cooled air that has passed through the evaporator and to control the rear air conditioner. It sends signals to the air conditioning amplifier. The signals change in accordance with the resistance of the rear air conditioning harness (rear evaporator temperature sensor). As the temperature decreases, the resistance increases. As the temperature increases, the resistance decreases. The air conditioning amplifier applies a voltage (5 V) to the rear air conditioning harness (rear evaporator temperature sensor) and reads voltage changes as changes in the resistance of the rear air conditioning harness (rear evaporator temperature sensor). This sensor is used for frost prevention.