Kia Optima Hybrid: Engine Control System / Intake Air Temperature Sensor (IATS) Repair procedures

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the IATS connector.
3.
Measure resistance between the IATS terminals 3 and 4.
4.
Check that the resistance is within the specification.
Temperature [°C(°F)]
Resistance (k?)
-40(-40)
40.93 ~ 48.35
-20(-4)
13.89 ~ 16.03
0(32)
5.38 ~ 6.09
10(50)
3.48 ~ 3.90
20(68)
2.31 ~ 2.57
40(104)
1.08 ~ 1.21
50(122)
1.56 ~ 1.74
60(140)
0.54 ~ 0.62
80(176)
0.29 ~ 0.34

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

Installation
   
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.

Manifold absolute pressure sensor mounting bolt:
9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

Intake Air Temperature Sensor (IATS) Schematic Diagrams

Circuit Diagram ...

Engine Coolant Temperature Sensor (ECTS) Description and Operation

Description Engine Coolant Temperature Sensor (ECTS) is located in the engine coolant passage of the cylinder head for detecting the engine coolant temperature. The ECTS uses a thermistor whose resistance ...

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