Manual Temperature Control (MTC) System

MANUAL TEMPERATURE CONTROL (MTC) SYSTEM





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

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 rotary control for blower motor speed selection and to turn the blower motor off (1).
- a rotary control for temperature control of the discharged air (2).
- a rotary control for mode control of the discharged air (3).
- a push-button control with indicator lamp for recirculation control of the discharged air (4).
- a push-button control with indicator lamp to turn the A/C system on and off (5).
- a push-button control with indicator lamp to turn the rear window defogger system on and off (6).

The A/C-heater control for the MTC heating and A/C system and 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 system and run the Actuator Calibration function using a scan tool to verify that the concern is not a system issue HVAC System Test.

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