Electronic Automatic Temperature Control
WARNING: This page is about a different car, the 2002 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
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
- Floor/panel door position
- Panel/defrost door position
- Air inlet duct door position