20
June 2014
2015 Legacy and Outback New Technology Training (Module 926)
Rear Vent Door Actuator Operation
The rear vent door actuator (introduced 2013 MY) controls the temperature of the air delivered to
the rear passengers through the center console rear vents. Set temperature for the rear passengers
is strictly controlled by the front passenger temperature control dial. Airflow mode setting has no
effect on rear vent door actuator position. The rear vent door actuator mixes chilled air from the
evaporator with heated air from the heater core. The SSMIII PID for this is Rr Vent Door Actuator
Position.
If the displayed value is at 75% (lowest temperature setting), the rear vent door is biased to
allow more cold air to flow. As the PID value decreases from 75% to -5% (temperature set point
increased) the amount of cold air mixed decreases and hot air increases. At the lowest value of
-5% (highest temperature setting) the air flow will essentially shut off for both hot and cold. Work
support can be accessed on the SSMIII by selecting All other models
Each System Check
Air Condition System Work Support System Operation Check Mode.
(2)
(1)
(5)
(6)
(3)
(4)
(7)
(8)
(1) Duct-rear heater LH
(2) Duct-rear heater RH
(3) Duct-extension LH
(4) Duct-extension RH
(5) Duct-console front
(6) Duct-console rear
(7) Center console duct
(8) Grille ASSY-rear heater
HVAC Duct Layout
The actuator can only be replaced by removing the heating and cooling unit and blower motor
housing from the vehicle.
Rear A/C Vent Actuator In Compartment HVAC Assembly
1-39
1-40
1-41
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