Keyless Access With Push Button Start System: Wiring Diagram
WARNING: This page is about a different car, the 2022 Subaru WRX. However, it is still accessible from the selected car via links, so may be relevant.
For the wiring diagram, refer to "Keyless Access With Push Button Start System" . Ref. to WIRING SYSTEM>KEYLESS ACCESS WITH PUSH BUTTON START SYSTEM>WIRING DIAGRAM