Kia Optima: Intake Air Temperature Sensor (IATS). Description and OperationTo 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.

Installation
Intake Air Temperature Sensor (IATS). SpecificationsReleasing the parking brake
Foot type
To release the parking brake, depress the parking brake pedal a second time while
applying the foot brake. The pedal will automatically extend to the fully released
position.
Hand ...
Check battery and cables
Winter puts additional burdens on the
battery system. Visually inspect the battery
and cables as described in section
7. The level of charge in your battery can
be checked by an authorized Kia ...
Troubleshooting
Troubleshooting
1.
The lamp switch inputs can be
checked using the GDS.
2.
To check the input value of lamp
switch, select option "Body Control Module".
...