ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [MZR 2.0 DISI]


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1.  Disconnect the negative battery cable.

2.  Remove the battery. (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI].)

3.  Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT [MZR 2.0 DISI].)

4.  Disconnect the A/F sensor connector for easy access.

5.  Disconnect the ECT sensor connector.

6.  Remove the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [MZR 2.0 DISI].)

7.  Place the ECT sensor in water with a thermometer, and heat the water gradually.

8.  Measure the resistance between the ECT sensor terminals A and B using an ohmmeter.

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•  If not as specified, replace the ECT sensor.
(See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [MZR 2.0 DISI].)

ECT sensor Specification

ECT (°C {°F})

Resistance (kilohms)

20{68}
35.48—39.20
80{176}
3.65—4.02