DTC P0982: Shift Solenoid "D" Control Circuit Low (Shift Solenoid Valve S4), DTC P0983 Shift Solenoid "D" Control Circuit High (Shift Solenoid Valve S4): 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.
Refer to DTC P0748 on DTC P0748 PRESSURE CONTROL SOLENOID "A" ELECTRICAL (SHIFT SOLENOID VALVE SL1) .