Dual Automatic Temperature Control (DATC) System

The HVAC system maintains the selected vehicle interior temperature by heating and/or cooling the air.

• During A/C operation, the system also reduces the relative humidity of the air.
• The driver may override the automatic mode of operation.
• The temperature control setting determines the desired air temperature.
• The blower motor control override button varies the blower motor speed.
• The driver side and passenger side temperature settings can be individually controlled.

The HVAC system operation is determined by the settings on the climate controls. The HVAC system automatically maintains a selected temperature for vehicle interior comfort. To control the various functions, the HVAC system is composed of the following:

• HVAC module
• Front Controls Interface Module (FCIM)
• Audio Front Control Module (ACM) or Front Display Interface Module (FDIM)
• Blower motor speed control
• Panel/defrost mode door actuator
• Floor mode door actuator
• Air inlet mode door actuator
• Driver and passenger temperature blend door actuators
• In-vehicle temperature sensor
• Ambient temperature sensor
• Solar radiation sensor
• Evaporator temperature sensor

When the DATC system is set to AUTO:

• the air distribution direction, blower motor speed and A/C compressor operation are automatically controlled based on the temperature(s) selected.

The DATC system manual override settings:

• allow the air distribution direction to be manually selected.
• allow the blower motor speed to be manually selected.
• allow recirculation mode to be manually selected in all modes except DEFROST. The A/C request can be cancelled by pressing the A/C request switch, turning the indicator OFF.
• allow A/C compressor operation to be manually selected except in DEFROST.