System Airflow Description - Dual Automatic Temperature Control (DATC) System

AUTO 

When AUTO is selected:

• the temperature control setting is manually set to the desired setting.
• the air inlet door actuator is automatically controlled by the HVAC module - DATC, based on the temperature setting.
• the mode door actuators are automatically controlled by the HVAC module - DATC based on the temperature setting.
• the A/C compressor is automatically controlled by the HVAC module - DATC based on the temperature setting.
• the blower motor is ON. The blower motor speed is automatically controlled by the HVAC module - DATC based on the temperature setting, but can be manually overridden.

OFF 

When OFF is selected:

• the air inlet door actuator closes off outside air and admits only recirculated air.
• the A/C request button is disabled.
• the blower motor is OFF.

PANEL 

When PANEL is selected:

• the recirc request button is enabled. If the recirc request button is selected (indicator ON), the air inlet door actuator closes off outside air from entering the passenger compartment. If the recirc request button is not selected (indicator OFF), the air inlet door actuator admits only outside air into the passenger compartment.
• the floor/defrost/panel door directs airflow to the instrument panel A/C registers.
• blended air temperature is available. Only when A/C compressor operation has been selected by pressing the A/C request button (indicator ON), can the airflow temperature be cooled below the outside air temperature.
• the A/C request button is enabled. The A/C compressor will operate and the indicator will illuminate if the A/C request button is selected.
• the blower motor is ON.

PANEL/FLOOR 

When PANEL/FLOOR is selected:

• the recirc request button is enabled. If the recirc request button is selected (indicator ON), the air inlet door actuator closes off outside air from entering the passenger compartment. If the recirc request button is not selected (indicator OFF), the air inlet door actuator admits only outside air into the passenger compartment.
• the floor/defrost/panel door directs airflow to the floor duct and the instrument panel A/C registers. A small amount of airflow from the side window demisters and defrost duct will be present.
• blended air temperature is available. Only when A/C compressor operation has been selected by pressing the A/C request button (indicator ON), can the airflow temperature be cooled below the outside air temperature.
• the A/C request button is enabled. The A/C compressor will operate and the indicator will illuminate if the A/C request button is selected.
• the blower motor is ON.

FLOOR 

When FLOOR is selected:

• the recirc request button is enabled. If the recirc request button is selected (indicator ON), the air inlet door actuator closes off outside air from entering the passenger compartment. If the recirc request button is not selected (indicator OFF), the air inlet door actuator admits only outside air into the passenger compartment.
• the floor/defrost/panel door directs airflow to the floor duct. A small amount of airflow from the defroster duct and side window demisters will be present.
• blended air temperature is available. Only when A/C compressor operation has been selected by pressing the A/C request button (indicator ON), can the airflow temperature be cooled below the outside air temperature.
• the A/C request button is enabled. The A/C compressor will operate and the indicator will illuminate if the A/C request button is selected.
• the blower motor is ON.

FLOOR/DEFROST 

When FLOOR/DEFROST is selected:

• the recirc request button is enabled. If the recirc request button is selected (indicator ON), the air inlet door actuator closes off outside air from entering the passenger compartment. If the recirc request button is not selected (indicator OFF), the air inlet door actuator admits only outside air into the passenger compartment.
• the floor/defrost/panel door directs airflow to the floor duct, the defroster duct and the side window demisters.
• blended air temperature is available.
• the A/C request button is enabled. The A/C compressor will operate automatically and the indicator will illuminate if the A/C request button is selected.
• the blower motor is ON.

DEFROST 

When DEFROST is selected:

• the recirc request button and indicator is disabled. Regardless of button and indicator status, the air inlet door actuator admits only outside air into the passenger compartment.
• the floor/defrost/panel door directs airflow to the defroster duct and side window demisters. A small amount of airflow from the floor duct will be present.
• blended air temperature is available.
• to reduce fogging, the A/C compressor will operate automatically, regardless of indicator status.
• the blower motor is ON.