Air Distribution

AIR DISTRIBUTION

NOTE: The air distribution system of this vehicle cannot be equipped with a cabin air filter.

There are two sources of air available to the air distribution system:
- outside air
- recirculated air

Recirculated air is only used when the climate control assembly is set to the MAX A/C and OFF modes on vehicles equipped with manual climate control. Vehicles equipped with EATC or DATC use recirculated air only when in the AUTOMATIC mode (if functioning to obtain selected temperatures), or when the RECIRC function is selected.

Air distribution within the vehicle is determined by the function selector switch position (manual A/C), or the EATC/DATC system in the AUTOMATIC mode. The air distribution mode on vehicles equipped with EATC or DATC can be overridden by the driver if desired. Airflow mode control doors are used to direct airflow within the heater air plenum chamber. Vacuum control motors are used to position these airflow mode control doors.

Vehicles equipped with DATC use a partitioned plenum chamber with two separate temperature blend doors. This allows for individual temperature settings to be selected for the RH and LH air outlets. The airflow mode doors are not partitioned for separate RH and LH airflow positions, therefore the airflow mode will always remain similar for the RH and LH sides of the vehicle regardless of the temperatures selected.

The air distribution system is designed to provide airflow from the defrost nozzle when no vacuum is applied to any of the vacuum control motors. This is done to prevent a situation where defrost cannot be obtained due to a system vacuum leak.

Air enters the passenger compartment from the:
- instrument panel A/C registers.
- heater outlet floor duct.
- windshield defroster hose nozzle.
- side window demisters.
- rear seat airflow duct (if equipped).

Passenger compartment air is exhausted from the vehicle through open windows or body air vents.