Kia Carens: Engine Control System / Intake Air Temperature Sensor (IATS) Description and operation
Intake Air Temperature Sensor (IATS) is included inside Manifold Absolute Pressure
Sensor and detects the intake air temperature.
To calculate precise air quantity, correction of the air temperature is needed
because air density varies according to the temperature. So the ECM uses not
only MAPS signal but also IATS signal. This sensor has a Negative Temperature
Coefficient (NTC) Thermister and it's resistance changes in reverse proportion
to the temperature.

Inspection
1.
Connect the GDS on the Data Link Connector (DLC).
2.
Measure the output voltage of the MAPS at idle and IG ON.
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Specification
Temperature
Resistance (kΩ)
°C
°F
-40
-40
40.93 ~ 48.35
...
Other information:
Inspection
1.
Remove the air cleaner assembly.
(Refer to Engine Mechanical System - "Air Cleaner")
2.
Remove the battery and battery tray.
(Refer to Engine Electrical System - "Battery")
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Components
1. Main crash pad assembly
2. Crash pad side cover [LH]
3. Crash pad side cover [RH]
4. Steering column shroud lower panel
5. Crash pad lower panel
6. Fuse box cover
7. Glove box
...