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ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-X 2.0]

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ECT Sensor No.1

Function inspection (ECT sensor No.1)

1. Connect the M-MDS to the DLC-2.

2. Switch the ignition ON (engine off).

3. Display the PID ECT_VOLT and ECT. (See PID/DATA MONITOR INSPECTION.)(See PID/DATA MONITOR TABLE [PCM (SKYACTIV-X)].)

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

• If they do not match the standard, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)

• If they match the standard, perform the resistance inspection. (See Resistance Inspection (ECT sensor No.1).)

Standard

ECT_VOLT	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 (ECT sensor No.1)

Warning

• A hot engine can cause severe burns. Turn off the engine and wait until it is cool before removing the ECT sensor No.1.

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

2. Remove the ECT sensor No.1. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-X 2.0].)

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

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4. Measure the resistance between ECT sensor No.1 terminals A and B.

• If not as specified, replace the ECT sensor No.1. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-X 2.0].)

Specification

ECT (°C {°F})	Resistance (Kilohms)
20 {68}	Approx. 2.45
80 {176}	Approx. 0.318

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ECT Sensor No.2

Function inspection (ECT sensor No.2)

1. Connect the M-MDS to the DLC-2.

2. Switch the ignition ON (engine off).

3. Display the PID ECT2 and ECT2_VOLT. (See PID/DATA MONITOR INSPECTION.)(See PID/DATA MONITOR TABLE [PCM (SKYACTIV-X)].)

4. Compare the voltage indications for PID ECT2_VOLT and the temperature indications for PID ECT2 with the standards in the table indicated below.

• If they do not match the standard, replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-X 2.0].)

• If they match the standard, perform the resistance inspection. (See Resistance inspection (ECT sensor No.2).)

Standard

ECT2_VOLT [V]	ECT2 [°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 (ECT sensor No.2)

Warning

• A hot engine can cause severe burns. Turn off the engine and wait until it is cool before removing the ECT sensor No.2.

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

2. Remove the ECT sensor No.2. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-X 2.0].)

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

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4. Measure the resistance between ECT sensor No.2 terminals A and B.

• If not as specified, replace the ECT sensor No.2. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-X 2.0].)

Specification

ECT (°C {°F})	Resistance (Kilohms)
20 {68}	Approx. 2.45
80 {176}	Approx. 0.318

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ECT Sensor No.3

Resistance inspection (ECT sensor No.3)

Warning

• A hot engine can cause severe burns. Turn off the engine and wait until it is cool before removing the ECT sensor No.3.

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

2. Remove the ECT sensor No.3. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-X 2.0].)

3. Place the ECT sensor No.3 in water with a thermometer, and heat the water gradually.

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4. Measure the resistance between ECT sensor No.3 terminals A and B.

• If not as specified, replace the ECT sensor No.3. (See ENGINE COOLANT TEMPERATURE (ECT) SENSOR INSPECTION [SKYACTIV-X 2.0].)

Specification

ECT (°C {°F})	Resistance (Kilohms)
20 {68}	Approx. 2.45
80 {176}	Approx. 0.318

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