Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
INSPECTION1. DRAIN ENGINE COOLANT
2. REMOVE ECT SENSOR
a. Disconnect the ECT sensor connector.
b. Using SST, remove the ECT sensor and gasket.
SST 09205-76030
3. INSPECT ECT SENSOR
Using an ohmmeter, measure the resistance between the terminals.
Resistance: Refer to the graph
If the resistance is not as specified, replace the ECT sensor.
4. REINSTALL ECT SENSOR
a. Install a new gasket to the ECT sensor.
b. Using SST, install the ECT sensor.
SST 09206-76030
Torque: 19.6 Nm (200 kg.cm, 14 ft.lb)
c. Connect the ECT sensor connector.
5. REFILL WITH ENGINE COOLANT
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.