DTC P1752-31: Fail Safe Signal (Gear Shift Control Module "B" to "A") No Signal [10/2022 - ]: Wiring Diagram
WARNING: This page is about a different car, the 2025 Lexus RX 450h+, 2025 Lexus RX 350h, 2024 Lexus RX 450h+, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. However, it is still accessible from the selected car via links, so may be relevant.