Dual-Zone EATC: Notes

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/humidity sensor
• AAT sensor
• Autolamp/sunload sensor
• Vehicle speed
• ECT sensor or CHT sensor

Using these inputs, the dual-zone 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 mode door position
• Air inlet mode door position