DTC P0ADD-11: Hybrid/EV Battery Negative Contactor Circuit Short to Ground [09/2023 - ]: Wiring Diagram
WARNING: This page is about a different car, the 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.
Refer to the wiring diagram for the HV Battery High-voltage Line Circuit.
Refer to WIRING DIAGRAM