ACTIVE AIR SHUTTER SYSTEM

• The active air shutter system controlled by the PCM reduces turbulent air^*1 occurring around the vehicle which reduces air resistance. It does this by closing the active air shutter behind the front bumper mesh while the vehicle is being driven to control the air flowing into the engine compartment. In addition, by closing the shutter and blocking the air flow while the vehicle is driven during cold temperatures, the engine warms up more efficiently. By reducing the air resistance and improving the engine warm-up efficiency, the fuel economy has been improved.

*1 :Air flowing into the engine compartment from the front bumper mesh while the vehicle is driven flows underneath the floor and the tire housings and collides with the air flowing around the vehicle, creating turbulence.

Component parts	Function
PCM	The PCM controls the actuator of the active air shutter according to the driving and engine conditions.
Active air shutter	The active air shutter opens/closes the shutter according to the request signal from the PCM.
DSC HU/CM	The DSC HU/CM sends the vehicle speed signal to the PCM.
TCM	The TCM sends the cooling fan operation request signal to the PCM.
Climate control unit	The climate control unit sends the A/C operation signal to the PCM.
Intake air temperature sensor No.1	Intake air temperature sensor No.1 detects the intake air temperature before it passes through the throttle body.
Engine coolant temperature sensor No.1	Engine coolant temperature sensor No.1 detects the engine coolant temperature.
Refrigerant pressure sensor	The refrigerant pressure sensor detects the refrigerant pressure.

• For the active air shutter system control, refer to ACTIVE AIR SHUTTER SYSTEM CONTROL. (See ACTIVE AIR SHUTTER CONTROL.)