WARNING: This page is about a different car, the 2003 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Select Lever Shift lock Cannot Be Released Wiring Diagram
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Fig 2: Select Lever Shift Lock Cannot Be Released Trouble Shooting Chart (1 Of 3)
Courtesy of SUBARU OF AMERICA, INC.
Fig 3: Select Lever Shift Lock Cannot Be Released Trouble Shooting Chart (2 Of 3)
Courtesy of SUBARU OF AMERICA, INC.
Fig 4: Select Lever Shift Lock Cannot Be Released Trouble Shooting Chart (3 Of 3)