Electronic Automatic Temperature Control
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 clutch engagement
- blower speed
- air temperature blend door position
- heater air damper door position
- windshield defroster door position
- air inlet duct door position