Hyundai i-30: Engine Control System / Intake Air Temperature Sensor (IATS)

Hyundai i30 (PD) 2018-2025 Service Manual / Engine Control / Fuel System / Engine Control System / Intake Air Temperature Sensor (IATS)

Description and operation

Description

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.

Specifications

Specification

Temperature		Resistance (kΩ)
°C	°F	Resistance (kΩ)
-40 ± 1	-40 ± 1	38.88 - 50.77
-20 ± 1	-4 ± 1	13.20 - 16.83
0 ± 1	32 ± 1	5.12 - 6.12
20 ± 1	68 ± 1	2.20 - 2.69
25 ± 1	77 ± 1	1.81 - 2.21
40 ± 1	104 ± 1	1.02 - 1.27
60 ± 1	140 ± 1	0.52 - 0.65
80 ± 1	176 ± 1	0.28 - 0.35
100 ± 1	212 ± 1	0.16 - 0.21
120 ± 1	248 ± 1	0.10 - 0.13
130 ± 1	266 ± 1	0.08 - 0.10
150 ± 1	302 ± 1	0.05 - 0.07

Schematic diagrams

Circuit Diagram

Harness Connector

Repair procedures

Inspection

1.	Turn the ignition switch OFF.

2.	Disconnect the IATS connector.

3.	Measure resistance between the IATS terminals 3 and 4.

Check that the resistance is within the specification.

Specification : Refer to "Specification"

Removal

1.	Turn the ignition switch OFF and disconnect the battery negative (-) cable.

2.	Disconnect the manifold absolute pressure sensor connector (A).

Remove the installation bolt (B), and then remove the sensor from the surge tank.

Tightening Torque :

9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)

Installation

•	Install the component with the specified torques.

•	Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect before installing.

•	Insert the sensor in the installation hole and be careful not to damage.

1.	Install in the reverse order of removal.

Manifold Absolute Pressure Sensor (MAPS)

Description and operation Description Manifold Absolute Pressure Sensor (MAPS) is a speed-density type sensor and is installed on the surge tank...

Ambient Temperature Sensor (ATS)

Description and operation Description Ambient Temperature Sensor (ATS) is installed on the front-end module and senses the ambient temperature...

Other information:

Hyundai i30 (PD) 2018-2025 Owner's Manual: To activate the ISG system

Prerequisite for activation The ISG system operates in the following situations. - The driver's seatbelt is fastened. - The driver's door and the bonnet are closed. - The brake vacuum pressure is adequate. - The battery is sufficiently charged...

Hyundai i30 (PD) 2018-2025 Owner's Manual: Special driving conditions

Hazardous driving conditions When hazardous driving elements are encountered such as water, snow, ice, mud and sand, take the following precautions: Drive cautiously and maintain a longer braking distance. Avoid abrupt braking or steering...