Hyundai Palisade (LX2): Engine Control System / Intake Air Temperature Sensor (IATS)

Hyundai Palisade (LX2) 2020-2025 Service Manual / Engine Control/Fuel System / Engine Control System / Intake Air Temperature Sensor (IATS)

Description and operation

Description
Mounted inside the Manifold Absolute Pressure Sensor, Intake Air Temperature Sensor (IATS) detects the intake air temperature.
To precisely calculate the amount of air, correction of the air temperature is required as the air density varies with the temperature. So the ECM uses not only MAPS signal but also IATS signal. This sensor has a Negative Temperature Coefficient (NTC) thermistor with resistance in reverse proportion to the temperature.

Hyundai Palisade. Description and operation

Specifications

Specification
Temperature
Resistance (kΩ)
°C
°F
-40
 -40
 40.93 - 48.35
-20
 -4
 13.89 - 16.03
0
 32
 5.38 - 6.09
10
 50
 3.48 - 3.90
20
 68
 2.31 - 2.57
40
 104
 1.08 - 1.21
60
 140
 0.54 - 0.66
80
 176
 0.29 - 0.34

Schematic diagrams

Circuit Diagram

Hyundai Palisade. Schematic diagrams

Harness Connector

Hyundai Palisade. Schematic diagrams

Repair procedures

Inspection
1.
Switch "OFF" the ignition.
2.
Disconnect the IATS connector.
3.
Measure resistance between the IATS terminals 3 and 4.
4.
Check that the resistance is within the specification.
Temperature
Resistance (kΩ)
°C
°F
-40
 -40
 40.93 - 48.35
-20
 -4
 13.89 - 16.03
0
 32
 5.38 - 6.09
10
 50
 3.48 - 3.90
20
 68
 2.31 - 2.57
40
 104
 1.08 - 1.21
60
 140
 0.54 - 0.66
80
 176
 0.29 - 0.34

Removal
1.
Switch "OFF" the ignition and disconnect the negative (-) battery terminal.
2.
Disconnect the vacumm hose (A).
3.
Disconnect the intake temperature sensor connector (B).
4.
Remove the sensor after loosening the mounting bolt.
Intake Air Temperature Sensor (IATS) mounting bolt :
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

Hyundai Palisade. Repair procedures
Installation
Hyundai Palisade. Repair procedures   
•
Install the component to the specified torque.
•
Note that internal damage may occur if the component is dropped. In this case, inspect the component before installation.
•
Insert the sensor in the installation hole and be careful not to damage it during installation.
1.
Install in the reverse order of removal.

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