90CS Quattro V6-2.8L (AFC) (1995)
Air Door Actuator / Motor: Testing and Inspection
NOTE: Image shows the fresh air/recirculating flap vacuum motor with the heater box and evaporator housing assembly removed.
Located in passenger side, on right side of heater box.
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Remove passenger side lower instrument panel cover.
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Disconnect vacuum hose from vacuum motor.
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Connect hand vacuum pump US 8026 to vacuum motor.
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Create 300 mbar (20.7 in. Hg) of vacuum using pump and hold.
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Fresh air/recirculating flap moves to stop (recirculating mode)
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Vacuum must hold steady and not drop more than 1O% in two minutes.
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Flap must remain in recirculating mode position
If no:
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Replace fresh air/recirculating flap vacuum motor.
NOTE: Remove entire heater box and evaporator housing assembly to replace vacuum motor.