Automatic Single Zone
The A/C-heater control for the Automatic Temperature Control (ATC) single zone system maintains the interior comfort level desired by the vehicle operator. This is accomplished by use of an interior temperature sensor, ambient temperature sensor, and sun load sensor, based on the sensor input, the system automatically adjusts the air temperature, airflow volume, airflow distribution and amount of inside air recirculation to maintain front seat occupant comfort, even under changing outside weather conditions. All controls are identified by ISO graphic symbols.
This ATC system offers several manual override features such as fan speed, airflow distribution and when the outside air contains smoke, odors, high humidity, or if rapid cooling is desired, the interior air can be recirculated by pressing the recirculation button.
The heating-A/C system uses electrically operated controls. These controls provide the vehicle operator with a number of setting options to help control the climate and comfort within the vehicle.
The A/C-heater control is located in the instrument panel and contains:
- a push-button control with indicator lamp to manually turn the A/C system on and off (1).
- a push-button control with indicator lamp for manual recirculation control of the discharged air (2).
- a push-button control with indicator lamp to change the current setting to front defrost mode (3). Performing this function will cause the ATC to switch to manual mode.
- a push-button control with indicator lamp to turn on the rear window defroster (4) and the heated outside mirrors if equipped. The rear window defroster automatically turns off after ten minutes.
- a rotary control for manual and automatic blower motor speed selection (6).
- a push-button control to turn climate control ON or OFF (7).
- a push-button control to adjust temperature control down (8).
- a push-button control to adjust temperature control up (9).
- Mode functions are controlled through the Uconnect Media Center Touch Screen.
The A/C-heater control for the ATC heating and A/C system obtains vehicle speed, engine speed, engine coolant temperature, ambient temperature and refrigerant system head pressure data from the CAN-B bus and is diagnosed using a scan tool. Refer to DIAGNOSIS AND TESTING .
Prior to replacing an A/C-heater control, check for any Diagnostic Trouble Codes (DTCs) related to the heating-A/C system and run the Actuator Calibration function using a scan tool to verify that the concern is not a system issue. Refer to STANDARD PROCEDURE .
The A/C-heater control cannot be adjusted or repaired and must be replaced if inoperative or damaged.