ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0]

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Function Inspection

1.  Connect the M-MDS to the DLC-2.

2.  Switch the ignition ON (engine off).

3.  Display the PID ECT. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 1.5, SKYACTIV-G 2.0)].) (See PCM INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)

4.  Compare the voltage and temperature indications for the PID ECT with the standard in the table indicated below.

•  If they do not match the standard, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)
•  If they match the standard, perform the resistance inspection. (See Resistance Inspection.)

Standard

ECT

V

°C {°F}
Approx. 3.10
20 {68}
Approx. 2.16
40 {104}
Approx. 1.40
60 {140}
Approx. 0.87
80 {176}
Approx. 0.54
100 {212}


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 terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

2.  Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)

3.  Disconnect the ECT sensor connector.

4.  Remove the ECT sensor using the SST. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)

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-G 1.5, SKYACTIV-G 2.0].)

Specification (Reference)

ECT (°C {°F})

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

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