With Electronic Automatic Temperature Control
Manual Control:
Electronic Control:
CLIMATE CONTROL ASSEMBLY
The climate control assembly consists of three main sections:
^ Air flow control
^ Temperature control
^ Blower motor control
Manual Control:
Electronic Control:
Air Flow Control
The air flow control is one large switch containing eight airflow control buttons. The air flow control section is divided into two sub-sections. The first section contains six mutually canceling air flow control buttons. The second section contains the recirc/fresh air flow control and a dummy button, or the A/C button (if equipped).
The air flow control's six mutually canceling air flow control buttons operate the panel/floor/defrost door actuator motor which controls the position of mode doors. The position of the mode doors controls the air flow through the system. There is an air flow control button for each of the following functions:
^ Off
^ Mix
^ Defrost
^ Panel
^ Bi-level
^ Floor
Manual Control:
Electronic Control:
The mutually canceling feature of the six air flow control buttons allows any air flow control to be selected while in any other air flow control. As a button is depressed, the previous selection is automatically canceled and the new function is activated.
Temperature Control - Manual Control System
Temperature control of the heating and defrosting system is determined by the position of the temperature control knob. Cooler temperatures are achieved by rotating the knob counterclockwise and warmer temperatures are achieved by rotating the knob clockwise.
Temperature Control - Electronic Control System
Temperature control of the electronic heating and defrosting system is determined by the TEMP button. Depressing the button will show and set selected temperature in the display window. Push the left side of the button to lower the temperature setting. Push the right side of the button to raise the temperature.
The manual setting of the temperature controls the position of the temperature blend door. The temperature blend door controls how much of the air circulating through the system passes through the heater core and how much goes around it. Increasing the air flowing over the heater core increases air temperature. Decreasing the air supplied to the heater core decreases the temperature.
Blower Motor Control - Manual Control System
The position of the blower motor control knob determines the speed at which the blower motor operates. Each position of the blower motor control knob is detented for positive engagement. The blower motor control works in conjunction with the blower motor resistor to control the four speed operation of the blower motor.
Blower Motor Control - Electronic Control System
The rotation of the blower motor control determines the speed of the blower motor. The blower motor control works in conjunction with the A/C blower motor speed control to control the twelve speed operation of the blower motor.
Manual Control:
Electronic Control:
Recirculation/Fresh Air Control
The RECIRC/FRESH air flow control button operates independently from the rest of the air flow control. Depressing the RECIRC/FRESH air flow control button activates a door actuator motor which positions the A/C air inlet door. This controls the air which is drawn into the system from within and/or from outside of the vehicle.
SYSTEM OPERATION
NOTE: The A/C air inlet door is only open when the A/C temperature control is in the maximum COOL position and the RECIRC/FRESH air RECIRC control is in the recirc mode.
Selection of the air flow control buttons in the climate control assembly determines the position of the mode doors in the heater assembly, and thus the direction of airflow throughout the system. The illustrations show airflow direction and mode door positioning in each of the air flow control settings. A manual climate control assembly in the illustrations is used, the electronic climate control assembly is similar.
OFF
There is no air flow through the system when the OFF air flow control button is selected.