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:
Specifications
Specification
Item
Specification
Power source
3 V
Operating temperature
-22 - 176°F (-30 - 80°C)
RF Modulation
FSK
LF Modulation
...
If your temperature gauge indicates overheating, you will experience a loss of
power, or hear loud pinging or knocking, the engine is probably too hot. If this
happens, you should:
1. Pull off the road and stop as soon as it is safe to do so.
2. Place the shift lever in P (Intelligent Variable ...