Evaporator Temperature Sensor / Switch: Testing and Inspection

Evaporator Temperature Sensor
Self-diagnosis indicator light E comes on: Indicates a problem in the evaporator sensor circuit. Use a digital multimeter (KS-AHM-32-003) to check it.

The evaporator temperature sensor is a temperature dependent resistor (thermistor). The resistance of the thermistor decreases as the evaporator outlet air temperature increases.