INTAKE AIR TEMPERATURE (IAT) SENSOR [SKYACTIV-G 2.5T]

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Outline

•  Detects the intake air temperature before and after it passes through the throttle body to enhance the accuracy of the fuel injection control.

IAT sensor No.1


Purpose

•  Detects the intake air temperature before it passes through the throttle body (just after passing the air cleaner) as basic information for mainly determining the fuel injection amount.


Function

•  Indicates the resistance value according to the intake air temperature just after it passes through the air cleaner.

IAT sensor No.1 characteristic

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Construction

•  The IAT sensor No.1 is integrated with the MAF sensor.
•  A thermistor has been adopted for the detection area of IAT sensor No.1.
•  A thermistor is a resistor element in which changes in the electrical resistance are large relative to the temperature change. Using this characteristic, the sensor detects the intake air temperature as a resistance value.
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Operation

1.  IAT sensor No.1 detects (1) the intake air temperature.

2.  The PCM detects (2) the intake air temperature based on the voltage from IAT sensor No.1.

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Fail-safe

DTC No.

Fail-safe function
P0112:00
•  Fixes the intake air temperature (for engine control) at 20 °C {68 °F}.
•  Inhibits the fuel cut control during shift change.
P0113:00
•  Fixes the intake air temperature (for engine control) at 20 °C {68 °F}.
•  Inhibits the fuel cut control during shift change.


IAT sensor No.2


Purpose

•  Detects the intake air temperature after it passes through the throttle body (in intake manifold) as basic information for mainly determining the fuel injection amount.


Function

•  Indicates the resistance value according to the intake air temperature after it passes through the throttle body (intake manifold).

IAT sensor No.2 characteristic

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Construction

•  The IAT sensor No.2 is integrated with the MAP sensor.
•  A thermistor has been adopted for the detection area of IAT sensor No.2.
•  A thermistor is a resistor element in which changes in the electrical resistance is large against temperature change. Using this characteristic, the sensor detects the intake air temperature as a resistance value.
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Operation

1.  IAT sensor No.2 detects (1) the intake air temperature.

2.  The PCM detects (2) the intake air temperature based on the voltage from IAT sensor No.2.

ardjjn00001673


Fail-safe

•  Not applicable