Manual Single Zone

MANUAL SINGLE ZONE

The A/C-heater control (1) for the manual temperature control (MTC) single zone heating-A/C system allows one temperature setting for the entire vehicle. All controls are identified by ISO graphic symbols.





The A/C-heater control (1) is located in the instrument panel and contains:

- a rotary control for blower motor speed selection and to turn the heater-A/C system off (2).
- a rotary control for temperature control of the discharged air (3).
- a rotary control for mode control of the discharged air (4).
- a push-button control for recirculation control of the discharged air (5).
- a push-button control to turn the A/C system on and off (6).
- a push-button control to turn the rear window defogger system on and off (7).
- each push-button control has an indicator lamp that illuminates when selected (6).

The front A/C-heater control utilizes integrated circuitry and information carried on the controller area network (CAN) IHS bus to monitor many sensors and switch inputs throughout the vehicle. In response to those inputs, the internal circuitry and programming of the A/C-heater control allows it to control the electronic functions and features of the MTC heating-A/C system.

The front A/C-heater control is diagnosed using a scan tool.

Prior to replacing an A/C-heater control, check for any diagnostic trouble codes (DTCs) related to the heating-A/C systems and run the calibration procedure to verify that the concern is not a system issueHVAC Actuator Calibration Procedure.

The front A/C-heater control cannot be repaired and must be replaced if inoperative or damaged.