Hyundai Creta: Engine Control System / Intake Air Temperature Sensor (IATS)
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.
Specifications
Temperature [°C(°F)]
|
Resistance(kΩ)
|
-40 (-40)
|
40.93 ~ 48.35
|
-30 (-22)
|
23.43 ~ 27.34
|
-20 (-4)
|
13.89 ~ 16.03
|
-10 (14)
|
8.50 ~ 9.71
|
0 (32)
|
5.38 ~ 6.09
|
10 (50)
|
3.48 ~ 3.90
|
20 (68)
|
2.31 ~ 2.57
|
25 (77)
|
1.90 ~ 2.10
|
30 (86)
|
1.56 ~ 1.74
|
40 (104)
|
1.08 ~ 1.21
|
60 (140)
|
0.54 ~ 0.62
|
80 (176)
|
0.29 ~ 0.34
|
Troubleshooting
Schematic diagrams
(M/T)
(A/T)
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.
|
Specification : Refer to "Specification"
|
|
| 1. |
Turn the ignition switch OFF and disconnect the battery negative (-)
terminal.
|
| 2. |
Remove the resonator and the air intake hose.
(Refer to Engine Mechanical System - "ETC (Electronic Throttle control)
System")
|
| 3. |
Remove the ETC module.
(Refer to Engine Control System - "ETC")
|
| 4. |
Disconnect the manifold absolute pressure sensor connector (A).
|
| 5. |
Remove the mounting bolt (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. |
Install in the reverse order of removal.
|
Intake air temperature sensor mounting bolt :
9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)
|
|
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