Electronic Climate Control

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 compressor clutch engagement
- blower speed
- air temperature blend door position
- heater air damper door position
- windshield defroster door position
- air inlet duct door position

Variable Load Control Module
The variable load control module:
- is located behind the RH front wheel inner splash shield.
- incorporates circuit control provisions for the fan motor and the A/C clutch field coil .
- communicates with the powertrain control module through the multiplex communication network.













System Response