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 ...
Specifications
Specification
Engine Coolant Temperature
Sensor (ECTS)
▷ Type: Thermistor type
Temperature
Resistance (kΩ)
°C
...
Other information:
Repair procedures
Removal
1.
Remove the under cover.
(Refer to Engine Mechanical System - "Engine Room Under Cover").
2.
Remove the ATF drain plug (A), allow the fluid to drain out and then
reinstall the drain plug.
...
This warning light illuminates:
Once you set the ignition switch or Engine Start/Stop Button to the ON position.
- It remains on until the engine is started.
When there is a malfunction with either the alternator or electrical charging
system.
If there is a malfunction with either th ...