Multi-Function Thermal Sensor / Switch: Testing and Inspection

Thermostatic Switch
1. Remove the glove box assembly.
2. Turn the blower and A/C switches ON.
3. Start the engine.
4. With the thermostatic switch connector in coupled state, install a voltmeter between 2 and 3 (-) terminal and check whether there is change in voltage between terminals according to the temperature of the evaporator surface.




* Thermostatic switch operating characteristics

NOTE: This check should be carried out on the back probes of the thermostatic switch when it is in coupled state.

5. If above condition is not satisfied, remove the evaporator unit and replace the thermostatic switch.