INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [SKYACTIV-G 1.5, SKYACTIV-G 2.0]

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IAT Sensor No.1

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 1.5, 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 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 1.5, SKYACTIV-G 2.0].)

Standard

IAT

V

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


IAT Sensor No.2

Note
•  The IAT sensor No.2 is built into the MAP sensor. When replacing the IAT sensor No.2, replace 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 1.5, 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 IAT2 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

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

2.  Remove the following parts:

(1)  Wiper arm (See WIPER ARM AND BLADE REMOVAL/INSTALLATION.)
(2)  Cowl grille (See COWL GRILLE REMOVAL/INSTALLATION.)
(3)  Front suspension tower bar (Vehicles with front suspension tower bar) (See FRONT SUSPENSION TOWER BAR REMOVAL/INSTALLATION.)
(4)  Air box complete (See AIR BOX COMPLETE REMOVAL/INSTALLATION.)

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

4.  Remove the screw. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.2 REMOVAL/INSTALLATION [SKYACTIV-G 1.5, SKYACTIV-G 2.0].)

5.  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 1.5, SKYACTIV-G 2.0].)

6.  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 1.5, SKYACTIV-G 2.0].)

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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