Subaru LEGACY 2002 Quick Reference Index page 522

HVAC System (Heater, Ventilator and A/C)
2. TEMPERATURE CONTROL
1) LHD VEHICLE:
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.
The ECM compares the air mix damper opening it has received from the air mix damper potenti-
ometer with the target opening it has calculated and, if necessary, operates the motor to move the
damper to the HOT or COLD side and hold the damper in an appropriate position.
The target damper opening is corrected using the sunlight intensity data.
The air mix damper is moved fully to the HOT side and held there when the temperature set switch
is placed at the FULL HOT position (32°C), while it is moved fully to the COLD side and held there
when the switch is placed at the FULL COLD position (18°C).
Measurement condition: inlet air temperature 0˚C
:When exposed to sunbeam
:When not exposed
to sunbeam
(1) If the vehicle is exposed to sunbeam, the air mix damper opening is set to 60% when the cabin temperature is 25°C and
the ambient temperature is 30°C.
(2) The air mix damper opening is set to 0% (maximum cool position) when the cabin temperature is 40°C and ambient tem-
perature is 30°C.
AUTOMATIC AIR CONDITIONING
AC-50
Cabin temperature (˚C)
B4H1324B