Hyundai Santa Fe (TM): 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 diagnostic tool on the Data Link Connector (DLC).
2.
Measure the output voltage of the MAPS at idle and IG ON.
Specification
Temperature [°C (°F)]
Resistance (kΩ)
-40 (-40)
40.93 - 48.35
-20 (-4)
13.
Other information:
Special Service Tools
Tool Name / Number
Illustration
Description
LKA Compensator
(09890-3V100)
Used for compensating front view camera unit
Vertical measuring instrument
(09964-C1200)
Used to measure l