Corolla LE Sedan L4-1762cc 1.8L DOHC MFI (1998)
Coolant Temperature Sensor / Switch HVAC: Testing and Inspection
INSPECT ECT SWITCH CONTINUITY
a. Using an ohmmeter, check that no continuity exists between the terminals when the coolant temperature is above 90 °C (194 °F).
If continuity exists, replace the switch.
b. Using an ohmmeter, check that continuity exists between the terminals when the coolant temperature is below 83 °C (181 °F).
If there no continuity exists, replace the switch.
