Corolla LE Sedan L4-1.8L (1ZZ-FE) (1999)
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Coolant Temperature Sensor / Switch HVAC: Testing and 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.
