WARNING: This page is about a different car, the 2011 Subaru Tribeca. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Select Lever Cannot Be Locked - Circuit Diagram
Courtesy of SUBARU OF AMERICA, INC.
Fig 2: Select Lever Cannot Be Locked Diagnosis Procedure Chart (1 Of 3)
Courtesy of SUBARU OF AMERICA, INC.
Fig 3: Select Lever Cannot Be Locked Diagnosis Procedure Chart (2 Of 3)
Courtesy of SUBARU OF AMERICA, INC.
Fig 4: Select Lever Cannot Be Locked Diagnosis Procedure Chart (3 Of 3)