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

ECT Sensor Circuit - Schematic View:

ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION

1. Drain engine coolant.

2. Remove ECT sensor.

3. Inspect ECT sensor.

Using an ohmmeter, measure the resistance between the terminals.

Testing The ECT Sensor:

Resistance: Refer to the graph above.

If the resistance is not as specified, replace the ECT sensor.

4. Reinstall ECT sensor.

5. Refill with engine coolant.