Coolant Temperature Sensor / Switch HVAC: Testing and Inspection

INSPECTION




INSPECT ECT SWITCH CONTINUITY
a. Using an ohmmeter, check no continuity exists between terminals when the coolant temperature is above 90 °C (194 °F).
If continuity exists, replace the switch.
b. Using an ohmmeter, check continuity exists between terminals when the coolant temperature is below 83 °C (181 °F).
If no continuity exists, replace the switch.