Coolant Temperature Sensor / Switch HVAC: Testing and Inspection

INSPECTION




INSPECT ECT SWITCH
a. Using an ohmmeter, check that no continuity exists between the terminals when the coolant temperature is above 100 °C (212 °F).
If continuity exists, replace the switch.
b. Using an ohmmeter, check that continuity exists between the terminals when the coolant temperature is below 91 °C (196 °F)
If there no continuity exists, replace the switch.