Kia Cee'd: 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) Thermister and it's resistance changes in reverse proportion to the temperature.

Manifold Absolute Pressure Sensor (MAPS) Repair procedures

Inspection 1. Connect the GDS on the Data Link Connector (DLC). 2. Measure the output voltage of the MAPS at idle and IG ON. ...

Intake Air Temperature Sensor (IATS) Specifications

Specification   Temperature Resistance (kΩ) °C °F -40 -40 40.93 ~ 48.35 ...

Other information:

Kia Cee'd JD Owners Manual: Indicator light
When ignition switch is turned to ON, the indicator light illuminates, then goes off if the ESC system is operating normally. The ESC indicator light blinks whenever ESC is operating or illuminates when ESC fails to operate. ESC OFF indicator light comes on when the ESC is turned off w ...

Kia Cee'd JD Owners Manual: Glow indicator (Diesel engine)
The indicator light illuminates when the ignition switch is placed at the ON position. The engine can be started after the preheat indicator light goes off. The illuminating time varies with the water temperature, air temperature and battery condition. ✽ NOTICE If the engine does n ...