ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-D 1.5]

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Resistance Inspection

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.

1.  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 1.5].)

2.  Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT [SKYACTIV-D 1.5].)

3.  Remove the air hose. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)

4.  Remove the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)

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

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6.  Measure the resistance between ECT sensor terminals A and B.

•  If not as specified, replace the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)

Resistance

ECT (°C {°F})

Resistance (Kilohms)
20 {68}
Approx. 2.45
80 {176}
Approx. 0.318

Specification (Reference)

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