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

ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [MZR 1.5]

WARNING:
- When the engine is hot, it can badly burn. Turn off the engine and wait until it is cool before removing the ECT sensor.

ECT Sensor No.1 Inspection

1. Disconnect the negative battery cable.

2. Drain the engine coolant. Service Precautions

3. Remove the battery. Removal and Replacement

4. Disconnect the ECT sensor No.1 connector.

5. Remove the ECT sensor No.1. Service and Repair

6. Place the ECT sensor No.1 in water with a thermometer, and heat the water gradually.

7. Measure the resistance between the ECT sensor No.1 terminals using an ohmmeter.






- If not as specified, replace the ECT sensor No.1.
Service and Repair

ECT sensor No.1 specification





ECT Sensor No.2 Inspection

1. Disconnect the negative battery cable.

2. Drain the engine coolant. Service Precautions

3. Disconnect the ECT sensor No.2 connector.

4. Remove the ECT sensor No.2. Service and Repair

5. Place the ECT sensor No.2 in water with a thermometer, and heat the water gradually.

6. Measure the resistance between the ECT sensor No.2 terminals using an ohmmeter.






- If not as specified, replace the ECT sensor No.2.
Service and Repair

ECT sensor No.2 specification