Kia Forte BD Quiz
Engine Control System/Fuel System

Intake Air Temperature Sensor (IATS)

In this manual: Engine Control System/Fuel System
General Information — 8Maintenance — 32Engine Mechanical System — 47Engine Electrical System — 17Emission Control System — 10Engine Control System/Fuel System — 32Clutch System — 11Manual Transmission — 11DCT (Dual Clutch Transmission) System — 16Drive Shaft and Axle — 8Suspension System — 26Steering — 9Restraints — 11Brake System — 27Body (Interior and Exterior) — 119Body Electrical System — 98Heating, Ventilation, and Air Conditioning — 27
8steps
~48min
2/5difficulty
0102030405011.89N·mlb·ft
Tightening torque found on this page
Done 0 of 8

Specifications

Specification

Temperature Resistance (kOhm)
°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
50 122 0,76 - 0,85
60 140 0,54 - 0,62
80 176 0,29 - 0,34

Description and Operation

Description

The Intake Air Temperature Sensor (IATS) is built into the Manifold Absolute Pressure (MAP) sensor in the intake manifold. The sensor detects the temperature of the intake air.

Air temperature correction is required for accurate calculation of air quantity, because air density depends on temperature. Therefore, the ECM uses both the MAP signal and the IATS signal. This sensor is a Negative Temperature Coefficient (NTC) thermistor, and its resistance changes inversely with temperature.

Circuit Diagrams

Wiring Diagram

Harness Connector

Repair Procedures

Inspection

  1. Turn the ignition off.

  2. Disconnect the IAT sensor connector.

  3. Measure the resistance between terminals 3 and 4 of the IAT sensor.

  4. Make sure the resistance is within specification.

    Temperature Resistance (kOhm)
    °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
    50 122 0,76 - 0,85
    60 140 0,54 - 0,62
    80 176 0,29 - 0,34

Removal and Installation

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

  2. Disconnect the MAP sensor connector (A).

  3. Remove the sensor (B) from the intake manifold by loosening the mounting bolts.

    Intake Air Temperature Sensor Mounting Bolt:

    9,8–11.8 N·m

  4. Install in the reverse order of removal.

Test yourself

A quick Kia Forte BD quiz: every answer comes with an explanation and a link to the manual page.