Check Ignition Switch Circuit
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 inspection of the ignition switch circuit, refer to "Basic Diagnostic Procedure" of "KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)". Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>BASIC DIAGNOSTIC PROCEDURE