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: Transmission Control Module (TCM) I/O Signal (Turbo Model - 1 Of 4)
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Fig 2: Transmission Control Module (TCM) I/O Signal (Turbo Model - 2 Of 4)
Courtesy of SUBARU OF AMERICA, INC.
Fig 3: Transmission Control Module (TCM) I/O Signal (Turbo Model - 3 Of 4)
Courtesy of SUBARU OF AMERICA, INC.
Fig 4: Transmission Control Module (TCM) I/O Signal (Turbo Model - 4 Of 4)