Subaru LEGACY 2002 Quick Reference Index page 523

2) RHD VEHICLE:
! When setting temperature is 18.5°C to 31.5°C:
Blow-out air temperature is controlled by the air mix damper driven by the servo motor. More par-
ticularly, the ECM calculates the TAO based on signals from the respective sensors. Next, it deter-
mines the cooling capacity using the data from the evaporator sensor (TE) and then calculates the
target opening (SW) of the air mix damper based on the TAO and TE. The ECM then activates the
servo motor to attain the damper opening. After the damper has been moved to the calculated po-
sition, the ECM compares the actual opening (SP) of the air mix damper (detected by the poten-
tiometer incorporated in the servo motor) with the target opening (SW) and, if necessary, causes
the motor to move to make the SP exactly correspond to the SW.
! When the switch set temperature is 18.0°C or 32.0°C:
When the switch set temperature is 18.0°C or 32.0°C, input signals from the respective sensors
are ignored and the values shown below are invariably used as the TAO (MAX COOL or MAX
HOT).
Switch set temperature (°C)
18.0
32.0
AUTOMATIC AIR CONDITIONING
Control mode
MAX COOL
MAX HOT
AC-51
HVAC System (Heater, Ventilator and A/C)
TAO
–200 or less
200 or more