DTC P0748: Pressure Control Solenoid "A" Electrical (Shift Solenoid Valve SL1) [09/2014 - 11/2017]: Wiring Diagram
WARNING: This page is about a different car, the 2017 Lexus RC 350, 2017 Lexus RC 300, 2016 Lexus RC 350, 2016 Lexus RC 300, and 2015 Lexus RC 350. However, it is still accessible from the selected car via links, so may be relevant.