Automatic Temperature Control (ATC) - Dual Zone - Operation

AUTOMATIC TEMPERATURE CONTROL (ATC) - DUAL ZONE

The dual zone automatic temperature control (ATC) system automatically maintains the interior comfort level desired by the driver and front seat passenger. This is accomplished by using two infrared sensors within the A/C-heater control which is located at the center of the instrument panel. The two infrared sensors independently measure the surface temperature of the driver and front seat passenger. Based on the sensor input, the system automatically adjusts the air temperature, the airflow volume, the airflow distribution, and amount of inside air recirculation to maintain front seat occupant comfort, even under changing outside weather conditions.

When DUAL is displayed on the A/C-heater control, the driver and passenger air outlet temperatures can be individually adjusted from the two independent TEMP buttons. When a front seat passenger is not present, pressing the DUAL button will:

- disable the passenger side infrared sensor and control the entire system based only on the driver side temperature setting.
- replace the passenger side temperature setting in the display to the outside temperature reading.

Pressing the DUAL button a second time or adjusting the passenger side TEMP button will:

- reactivate the passenger side infrared sensor.
- return the system to dual independent temperature operation.

This ATC system offers several manual override features. The indicator light in both the AUTO HI or AUTO LO buttons will turn off when the system is being used in the manual mode. The fan speed, airflow distribution, and outside air/recirculated air can be manually adjusted.

The front blower fan control can be set to any fixed blower fan speed by pressing the rocker switch up or down. This allows the front occupants to control the volume of air circulated in the vehicle and cancel the auto mode. The fan will now operate at a fixed speed until additional speeds are selected or until either the AUTO HI or AUTO LO buttons are pressed. The system will continue to automatically adjust air temperature and airflow distribution.

When the outside air contains smoke, odors, high humidity, or if rapid cooling is desired, interior air can be recirculated by pressing the recirculation button. The recirculate symbol will illuminate in the display when this button is selected.

The outside temperature can be shown in the A/C-heater control display by pressing the OUTSIDE TEMP button. After pressing this button, the front seat passenger side temperature setting display will be replaced with the current outside temperature. Pressing the OUTSIDE TEMP button again or pressing the passenger side TEMP button will return the display to the passenger side temperature setting.

- The system automatically adjusts the temperature, mode and fan speed.
- When the heating- A/C system is off, the recirculation door is automatically closed to prevent outside air from entering the passenger compartment.
- Air conditioning is available in any mode by pressing the snowflake, A/C on/off, button.

To provide maximum comfort in the automatic mode during cold start-ups, the blower fan will remain off and DELAY will appear in the display until the engine warms up. The estimated the time remaining until the DELAY is complete will appear periodically in the display. However, the fan will engage immediately if the defrost mode is selected or by pushing the blower switch and manually adjusting the fan speed.