Air Distribution

Component Locations:

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 during MAX A/C (if equipped) and OFF modes.

Air distribution within the vehicle is determined by the function selector switch position. Airflow control doors are used to direct airflow within the heater air plenum chamber. Vacuum control motors are used to position these airflow control doors.

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.

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