Electronic Automatic Temperature Control (EATC): Notes
WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
The HVAC module analyzes input from the following major sources:
- Temperature, airflow direction, blower, A/C and RECIRC selection (made by the vehicle occupants)
- In-vehicle temperature sensor (non-hybrid)
- In-vehicle temperature and humidity sensor (hybrid)
- Ambient air temperature sensor
- Solar radiation sensor (sunload sensor)
- Vehicle speed
- Engine coolant temperature
- Occupant Classification Sensor (OCS) (hybrid only)
Using these inputs, the HVAC module determines the correct conditions for the following outputs:
- A/C compressor operation
- Blower motor speed
- RH and LH temperature blend door positions
- DEFROST/PANEL/FLOOR airflow mode door position
- Air inlet mode door position