Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection

ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION
1. DRAIN ENGINE COOLANT.



2. REMOVE ECT SENSOR.
3. INSPECT ECT SENSOR RESISTANCE.
- Using an ohmmeter, measure the resistance between the terminals.



- If the resistance is not as specified, replace the ECT sensor.
4. REINSTALL ECT SENSOR.
- Install a new gasket to the ECT sensor.
5. FILL RADIATOR WITH ENGINE COOLANT.

For circuit testing information refer to "DTC 22 - Engine Coolant Temperature Sensor Circuit" under the Trouble Code charts.
Testing and Inspection