Dual-Zone Electronic Automatic Temperature Control
The dual-zone 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 sensor
- ambient temperature sensor
- dual sunload sensor
- vehicle speed
- engine rpm
- engine coolant temperature
- actuator door position controls
- driver and passenger heater core air discharge temperature sensors
- evaporator air discharge temperature sensor
Using these inputs, the microcontroller determines the correct conditions for the following outputs:
- A/C clutch engagement
- blower speed
- panel door position
- defrost door position
- floor door position
- air inlet duct door position
- coolant control valve
- electric water pump (3.9L engine)
- external temperature (outside temperature display)