Circuit description
WARNING: This page is about a different car, the 2018 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.
If the driver's door unlock function does not work but the entry lock function works properly, the communication between the vehicle and the electrical key transmitter SUB-ASSY is normal. In this case, the problem might be caused by a defect in the unlock sensor circuit between the collation ECM (smart key ECM ASSY) and the front door outer handle ASSY (driver's side electrical key antenna).