DTC P2769: Torque Converter Clutch Solenoid Circuit Low (Shift Solenoid Valve DSL), DTC P2770 Torque Converter Clutch Solenoid Circuit High (Shift Solenoid Valve DSL): Wiring Diagram
WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.