Air Distribution and Filtering

AIR DISTRIBUTION AND FILTERING

Air Distribution

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

There are 2 sources of air available to the air distribution system:
- Outside air
- Recirculated air

Recirculated air is used in OFF and is available in all modes except DEFROST and FLOOR/DEFROST.

Air distribution on vehicles equipped with dual-zone electronic automatic temperature control (EATC) is determined by the HVAC module in the AUTOMATIC mode but can be overridden by the driver if desired.

There are 4 independently actuated airflow mode doors used to direct airflow within the heater core and evaporator core housing and the plenum chamber. Vacuum control motors are used to position these airflow mode doors.

Vehicles with dual-zone EATC use a partitioned heater core and evaporator core housing assembly with 2 separate temperature blend doors. This allows individual temperature settings to be selected for the RH and LH air outlets. The airflow mode doors are not partitioned. Therefore, the airflow mode for the RH and LH outlets will remain similar in all modes, regardless of the temperature settings.

The air distribution system is designed to provide airflow from the defroster duct 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.
- floor ducts.
- windshield defroster duct.
- side window demisters.
- center flow-through console.

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