Kia Rio: Engine Control System / Intake Air Temperature Sensor (IATS)
Specifications
Intake Air Temperature
Sensor (IATS)
▷ Type: Thermistor type
Temperature
|
Resistance (kΩ)
|
°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
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) and its resistance is in inverse proportion to the temperature.

Schematic diagrams

Repair procedures
1. |
Turn ignition switch OFF.
|
2. |
Disconnect IATS connector.
|
3. |
Measure resistance between 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
|
-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
|

|
1. |
Turn ignition switch OFF and disconnect the battery negative (-) terminal.
|
2. |
Disconnect the manifold absolute pressure sensor connector (A).
|
3. |
Remove the installation screw (B), and then remove the sensor from the
surge tank.

|
• |
Install the component with the specified torques.
|
• |
Note that internal damage may occur when the component is dropped.
In this case, use it after inspecting.
|
• |
Insert the sensor in the installation hole and be careful not
to damage when installation.
|
|
1. |
Installation is reverse of removal.
|
Troubleshooting

Specifications
Specification
Manifold Absolute Pressure
Sensor (MAPS)
▷ Type: Piezo-resistive pressure sensor type
Pressure
[kPa (kgf/cm², psi)]
Outp ...
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▷ Type: Thermistor type
Temperature
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°C
...
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