Dual Automatic Temperature Control (DATC) System

The Dual Automatic Temperature Control (DATC) 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 buttons vary the blower motor speed.
• The driver side and passenger side temperature settings can be individually controlled.

The DATC  system operation is determined by the settings on the HVAC module - DATC  . The DATC  system automatically maintains a selected temperature for vehicle interior comfort. The DATC  system is composed of the HVAC module - DATC  , blower motor speed control, mode door actuator, air inlet door actuator, temperature blend door actuator, evaporator temperature sensor, in-vehicle temperature sensor, ambient temperature sensor, humidity sensor (Navigator only) and solar radiation sensor to control the various functions.

When the HVAC module - DATC  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 HVAC module - DATC  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 button, turning the indicator OFF.
• allow A/C compressor operation to be manually selected except in FLOOR/DEFROST and DEFROST.

The auxiliary climate controls:

• select the auxiliary blower motor speed.
• select the auxiliary airflow mode/temperature.

The HVAC module - DATC  also includes:

• a rear window DEFROST button, refer to GLASS, FRAMES AND MECHANISMS article.
• heated/cooled seat controls, refer to SEATING article.