Electronic Climate Control

The electronic automatic temperature control system maintains the selected vehicle interior temperature by heating and/or cooling the air.
- During A/C operation the system also reduces the relative humidity of the air.
- The driver may override the automatic mode of operation.

With the use of a microcontroller, the Electronic Automatic Temperature Control (EATC) module analyzes input from the following major sources:
- temperature, function and blower selection (made by the vehicle occupants)
- in-vehicle temperature
- ambient temperature
- sunload
- vehicle speed
- engine coolant temperature

Using these inputs, the microcontroller determines the correct conditions for the following outputs:
- A/C compressor clutch engagement
- blower speed
- air temperature blend door position
- panel/floor door position
- panel/defrost door position
- air inlet duct door position
- outside temperature display

Temperature Control
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.

Blower Motor Control
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 12-speed operation of the blower motor.