Kia Rio YB Quiz
Engine Control System/Fuel System

Intake Air Temperature Sensor (IATS)

In this manual: Engine Control System/Fuel System
General Information — 8Maintenance — 31Engine Mechanical System — 44Engine Electrical System — 14Emission Control System — 9Engine Control System/Fuel System — 30Clutch System — 10Manual Transmission — 10Automatic Transmission — 23Drive Shaft and Axle — 8Suspension System — 15Steering — 9Restraints — 14Brake System — 22Body (Interior and Exterior) — 115Body Electrical System — 84Heating, Ventilation, and Air Conditioning — 28
7steps
~42min
2/5difficulty
Done 0 of 7

Specifications

Specification

Intake Air Temperature Sensor (IATS)

▷ Type: Thermistor Type

Temperature Resistance (kOhm)
°C °F
-40 -40 40,93 - 48,35
-30 -22 23.43 - 27.34
-20 -4 13.89 - 16.03
-10 14 8,5 - 9,7
0 32 5.38 - 6.09
10 50 3,48 - 3,90
20 68 2,31 - 2,57
30 86 1,9 - 2,1
40 104 1,08 - 1,21
50 122 0,76 - 0,85
60 140 0,54 - 0,62
70 158 0,40 - 0,45
80 176 0,29 - 0,34
90 194 0,22 - 0,26
100 212 0,17 - 0,20
110 230 0,13 - 0,15
120 248 0,10 - 0,12
130 266 0,08 - 0,09

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 MAPS signal and the IATS signal. This sensor has a negative temperature coefficient (NTC), and its resistance is inversely proportional to temperature.

Circuit Diagrams

Wiring Diagram

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
    -30 -22 23.43 ~ 27.34
    -20 -4 13.89 ~ 16.03
    -10 14 8,5 ~ 9,7
    0 32 5,38 ~ 6,09
    10 50 3,48 ~ 3,90
    20 68 2,31 ~ 2,57
    30 86 1,9 ~ 2,1
    40 104 1,08 ~ 1,21
    50 122 0,76 ~ 0,85
    60 140 0,54 ~ 0,62
    70 158 0,40 ~ 0,45
    80 176 0,29 ~ 0,34
    90 194 0,22 ~ 0,26
    100 212 0,17 ~ 0,20
    110 230 0,13 ~ 0,15
    120 248 0,10 ~ 0,12
    130 266 0,08 ~ 0,09

Removal

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

  2. Disconnect the MAP sensor connector (A).

  3. Remove the mounting screw (B) and remove the sensor from the expansion tank.

Installation

  1. Installation is the reverse of removal.

Troubleshooting

Waveform

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