ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-G 2.5T]

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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.

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 2.5T)].) (See PCM INSPECTION [SKYACTIV-G 2.5T].)

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, perform the resistance inspection. (See Resistance Inspection.)

Standard

ECT

V

°C {°F}
Approx. 2.65
29 {84}
Approx. 0.71
88 {190}


Resistance Inspection

1.  Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

2.  Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT [SKYACTIV-G 2.5T].)

3.  Remove the ECT sensor. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)

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

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5.  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 2.5T].)

Specification (Reference)

ECT (°C {°F})

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

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