Outback L.L.Bean Edition AWD F6-3.0L (2002)
Control Module HVAC: Description and Operation
Control System
CONTROL SYSTEM
1. CALCULATION OF REQUIRED BLOW-OUT AIR TEMPERATURE (TAO)
1. REQUIRED BLOW-OUT AIR TEMPERATURE (TAO):
Upon reception of temperature set switch signals in addition to cabin temperature, ambient temperature and sunload sensor signals, the ECM
calculates the TAO first and then, based on the calculated temperature, it determines the outlets from which the air is to be blown out.
2. CALCULATION OF REQUIRED TAO:
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When the set temperature is 18.0 °C, the TAO is fixed at the MAX COOL.
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When the set temperature is 32.0 °C, the TAO is fixed at the MAX HOT.
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When the set temperature is 18.5 °C to 31.5 °C, an optimum TAO is calculated based on the set temperature, as well as the cabin
temperature, ambient temperature and sunload data at that time.
2. TEMPERATURE CONTROL
The temperature control is made based on the driver's inputs from the temperature set switch and the data from various temperature sensors; the
ECM determines the TAO using these data and operates the air mix motor so that the TAO can be attained.
