DTC P0976 Shift Solenoid "B" Control Circuit Low (Shift Solenoid Valve S2); DTC P0977 Shift Solenoid "B" Control Circuit High (Shift Solenoid Valve S2): Wiring Diagram
WARNING: This page is about a different car, the 2008 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.