What system you have?
Dual Automatic Temperature Control (DATC) System ?
System Airflow and Mode Description
AUTO
When AUTO is selected:
the temperature control setting is manually set to the desired setting.
the air inlet door is automatically controlled by the HVAC module based on the temperature setting.
the mode door is automatically controlled by the HVAC module based on the temperature setting.
the temperature blend doors are automatically controlled by the HVAC module, based on the temperature setting.
the A/C compressor is automatically controlled by the HVAC module, based on the temperature setting. The A/C compressor cannot operate if the outside temperature is below approximately 0°C (32°F).
the blower motor is on. The blower motor speed is automatically controlled by the HVAC module based on the temperature setting, but can be manually overridden.
OFF
When OFF is selected:
the air inlet door closes, preventing outside air and allowing only recirculated air.
the blower motor is off.
Max A/C
When MAX A/C is selected:
the air inlet door closes, preventing outside air and allows only recirculated air.
the RECIRC button is disabled and the indicator is illuminated (RECIRC forced on).
the mode doors direct airflow to the instrument panel A/C registers.
blended air temperature is available.
the A/C request button is illuminated and is disabled.
the A/C compressor operates if the outside temperature is above approximately 0°C (32°F).
the blower motor is on.
PANEL
When PANEL is selected:
the RECIRC request button is enabled. If the RECIRC request button is selected (indicator on), the air inlet door closes, preventing outside air from entering the passenger compartment. If the RECIRC request button is not selected (indicator off), the air inlet door opens, allowing only outside air into the passenger compartment.
the mode doors direct 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 operates and the indicator illuminates if the A/C request button is selected and the outside temperature is above approximately 0°C (32°F).
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 closes, preventing outside air from entering the passenger compartment. If the RECIRC request button is not selected (indicator off), the air inlet door opens, allowing only outside air into the passenger compartment.
the mode doors direct 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 is 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 operates and the indicator illuminates if the A/C request button is selected and the outside temperature is above approximately 0°C (32°F).
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 closes, preventing outside air from entering the passenger compartment. If the RECIRC request button is not selected (indicator off), the air inlet door opens, allowing only outside air into the passenger compartment. In this mode, the RECIRC request times-out after 5 minutes and return to fresh air mode. RECIRC mode can be selected again after the time-out.
the mode doors direct airflow to the floor duct. A small amount of airflow from the defroster duct and side window demisters is 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 operates and the indicator illuminates if the A/C request button is selected and the outside temperature is above approximately 0°C (32°F).
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 closes, preventing outside air from entering the passenger compartment. If the RECIRC request button is not selected (indicator off), the air inlet door opens, allowing only outside air into the passenger compartment. In this mode, the RECIRC request times-out after 5 minutes and return to fresh air mode. RECIRC mode can be selected again after the time-out.
the mode doors direct 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 operates automatically and the indicator illuminates if the A/C request button is selected and the outside temperature is above approximately 0°C (32°F).
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 opens, allowing only outside air into the passenger compartment.
the mode doors direct airflow to the defroster duct and side window demisters. A small amount of airflow from the floor duct is present.
blended air temperature is available.
the A/C request button is enabled. The A/C compressor operates automatically and the indicator illuminates if the A/C request button is selected and the outside temperature is above approximately 0°C (32°F).
the blower motor is on.
