Evaporator Temperature Sensor / Switch: Testing and Inspection

THERMISTOR AND PIN SENSOR




The thermistor and pin sensor will detect the core temperature and interrupt the compressor relay power to prevent evaporator freezing by excessive cooling.




The thermistor and pin sensor will use the thermal negative characteristic.
1. Thermistor (MANUAL)
1. Remove the glove box.
2. Start the engine.
3. Turn on the air conditioner.
4. Using the multi-tester, check the output voltage at terminals 2 and 3 of the thermistor.

2. Pin sensor (AUTOMATIC)
1. This is the same method as the thermistor to check the pin sensor.




Pin sensor temperature-resistance-output voltage characteristics