WARNING: This page is about a different car, the 2001 Subaru Forester and 2000 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
Close the high and low side manifold valves.
Fig 1: Identifying High & Low Side Manifold Valves
Turn the A/C system ON and turn the IG switch OFF.
Attach the high and low-pressure manifolds to the high and low services port on the vehicle.
Fig 2: Identifying High & Low Services Port On Vehicle