INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [SKYACTIV-G 1.3, SKYACTIV-G 1.5]

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IAT Sensor No.1 (Vehicles With MAF Sensor (5 Pin Type))


Resistance inspection

Note
•  Because the IAT sensor No.1 is integrated in the MAF sensor, replacing the IAT sensor No.1 includes replacement of the MAF sensor/IAT sensor No.1.

1.  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

2.  Disconnect the MAF sensor/IAT sensor No.1 connector.

3.  Measure the resistance between MAF sensor/IAT sensor No.1 terminals A and B.

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•  If not as specified, replace the MAF sensor/IAT sensor No.1. (See MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.1 REMOVAL/INSTALLATION [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)

Specification (Reference)

IAT (°C {°F})

Resistance (Kilohms)
−20 {−4}
13.7—16.6
20 {68}
2.49—2.79
60 {140}
0.622—0.703

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IAT Sensor No.1 (Vehicles With MAF Sensor (3 Pin Type))

Note
•  Because the IAT sensor No.1 is integrated in the MAF sensor, replacing the IAT sensor No.1 includes replacement of the MAF sensor/IAT sensor No.1.

Function inspection

1.  Connect the M-MDS to the DLC-2.

2.  Switch the ignition ON (engine off).

3.  Display the PID IAT. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 1.3, SKYACTIV-G 1.5)].) (See PCM INSPECTION [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)

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

•  If they do not match the standard, replace the MAF sensor/IAT sensor No.1. (See MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.1 REMOVAL/INSTALLATION [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)

Standard

IAT

V

°C {°F}
Approx. 2.70
20 {68}
Approx. 1.80
40 {104}
Approx. 1.20
60 {140}


IAT Sensor No.2 (Without Coolant Control Valve)


Resistance inspection

Note
•  Because the IAT sensor No.2 is integrated in the MAP sensor, replacing the IAT sensor No.2 includes replacement of the MAP sensor/IAT sensor No.2.

1.  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

2.  Remove the MAP sensor/IAT sensor No.2. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.2 REMOVAL/INSTALLATION [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)

3.  Measure the resistance between MAP sensor/IAT sensor No.2 terminals A and B.

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•  If not as specified, replace the MAP sensor/IAT sensor No.2. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.2 REMOVAL/INSTALLATION [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)

Specification (Reference)

IAT (°C {°F})

Resistance (Kilohms)
0 {32}
Approx. 5.9
20 {68}
Approx. 2.5
80 {176}
Approx. 0.323
130 {266}
Approx. 0.0893

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IAT Sensor No.2 (With Coolant Control Valve)

Note
•  Because the IAT sensor No.2 is integrated in the MAP sensor, replacing the IAT sensor No.2 includes replacement of the MAP sensor/IAT sensor No.2.

Function inspection

1.  Connect the M-MDS to the DLC-2.

2.  Switch the ignition ON (engine off).

3.  Display the PID IAT2. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 1.3, SKYACTIV-G 1.5)].) (See PCM INSPECTION [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)

4.  Compare the voltage and temperature indications for the PID IAT2 with the standard in the table indicated below.

•  If they do not match the standard, perform the resistance inspection. (See Resistance inspection.)

Standard

IAT2

V

°C {°F}
Approx. 3.57
20 {68}
Approx. 2.70
40 {104}
Approx. 1.87
60 {140}


Resistance inspection

1.  Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

2.  Disconnect the MAP sensor/IAT sensor No.2 connector.

3.  Remove the MAP sensor/IAT sensor No.2. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.2 REMOVAL/INSTALLATION [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)

4.  Measure the resistance between MAP sensor/IAT sensor No.2 terminals A and B.

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•  If not as specified, replace the MAP sensor/IAT sensor No.2. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.2 REMOVAL/INSTALLATION [SKYACTIV-G 1.3, SKYACTIV-G 1.5].)

Specification

IAT (°C {°F})

Resistance (Kilohms)
0 {32}
Approx. 5.9
20 {68}
2.375—2.625
80 {176}
Approx. 0.323
130 {266}
Approx. 0.0893

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