System Block Diagram
WARNING: This page is about a different car, the 2016 Subaru Outback and 2016 Subaru Legacy. However, it is still accessible from the selected car via links, so may be relevant.
Refer to "System Block Diagram" in "INFOTAINMENT SYSTEM (DIAGNOSTICS)". < Ref. to SYSTEM BLOCK DIAGRAM , Control Module I/O Signal. >