Electronic Automatic Temperature Control (EATC): Notes
Two different Electronic Automatic Temperature Control (EATC) systems are available:
- Single-zone EATC (Fusion/Milan)
- Dual-zone EATC (MKZ)
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
- Ambient temperature sensor
- Solar radiation sensor
- Vehicle speed
- Engine coolant temperature
Using these inputs, the HVAC module determines the correct conditions for the following outputs:
- A/C compressor operation
- Blower speed
- Temperature blend door position
- DEFROST/PANEL/FLOOR door position
- Air inlet door position