Kia Optima Hybrid: Cooling System / Active Air Flap(AAF) Description and Operation

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual / Engine Mechanical System / Cooling System / Active Air Flap(AAF) Description and Operation

Description

The AAF (Active Air Flap) is located between radiator grille and radiator, and consists of an actuator and 6 air flaps. The system receives information from EMS, FATC, TCU, MCU and LDC via CAN communication . With this information, the AAF controls the motor properly then the air flaps adjust air flow from radiator grille.

During high speed driving, it will reduce the air resistance by closing the air flaps. This improves the fuel efficiency and enhance the driving stability. If overheat occurs, the system will open the air flaps to drop the temperature.

During the A/C operation, the system will open the air flaps to maintain the refrigerant pressure.The system will close the air flaps to warm up the engine rapidly during cold start.

Specifications

Items	Specifications
Operating temperature	-22~185°F (-30~85°C)
Operating voltage	DC 9~16V
Rated voltage	DC 12V
Rated current (No load)	300mA or less

Thermostat Troubleshooting

Troubleshooting SymptomsPossible CausesRemedyCoolant leakage • From the thermostat gasket Check the mounting bolts • Check the torque of the mounting bolts • Retighten the bolts and check leakage ...

Active Air Flap(AAF) Components and Components Location

Components 1. Air duct2. Cover3. Actuator assembly4. Loader5. Flaps6. Link7. Housing ...

Other information:

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Refrigerant line Repair procedures

Replacement 1. Discharge refrigerant from refrigeration system. 2. Replace faulty tube or hose. Cap the open fittings immediately to keep moisture or dirt out of the system. 3. Tighten joint of bolt or nut to specified torque. Connections should not be torque tighter than ...

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Input Speed Sensor Repair procedures

Inspection 1. Check signal waveform of Input & output speed sensor using the GDS. Specification: Refer to "Signal Wave Form" section. Removal • Be sure to read and follow the “General Safety Information and Caution” before doing any work related with the high voltage system. Failure ...