Electronic Automatic Temperature Control
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 EATC module determines the correct conditions for the following outputs:
- A/C compressor operation
- blower speed
- temperature blend door position
- airflow door position
- coolant control valve