Electronic Manual Temperature Control (EMTC) System

The EMTC  system operation is determined by the settings on the HVAC module - EMTC  . The EMTC  system is composed of the HVAC module - EMTC  , blower motor resistor, mode door actuator, air inlet door actuator and temperature blend door actuator to control the various functions.

The blower motor switch:

• sets the blower motor speed.
• directs the blower motor path to ground through the blower motor resistor to allow blower motor operation in LO, MED-LO and MED-HI.
• directs the blower motor path directly to ground, bypassing the blower motor resistor to allow blower motor operation in HI.

The A/C request button:

• can command the A/C compressor ON (when the function selector switch is in PANEL, FLOOR/PANEL, FLOOR/DEFROST and FLOOR) when the A/C request switch is pressed. Indicator illuminates when A/C request switch is toggled ON.
• is inoperative in MAX A/C, OFF and DEFROST.
• indicator illuminates when the function selector switch is in MAX A/C and cannot be toggled.
• indicator does not illuminate in OFF and cannot be toggled.
• indicator does not illuminate in DEFROST but can be toggled ON or OFF. The A/C compressor will operate regardless of indicator status if the outside air temperature is above 6°C (43°F).
• is serviced only with the climate control module.

The function selector knob:

• selects airflow direction.

The air recirculation button:

• selects either recirculated or outside air source.
• recirculates air in any mode except DEFROST, if requested.
• is disabled in MAX A/C or OFF mode where recirculated air only is used.
• is disabled in DEFROST mode where outside air only is used.
• is serviced only with the climate control module.

The temperature selector knob:

• selects full warm and full cool as well as blended outlet temperatures.

The HVAC module - EMTC  also includes:

• a rear window DEFROST button. Refer to GLASS, FRAMES AND MECHANISMS .