ECU Power Source Circuit [08/2023 - ]: Description

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.

If the supply power to each ECU is discontinued due to a malfunction of the auxiliary battery power supply, the electronic shift lever system does not operate. Make sure to inspect the power supply system of the auxiliary battery for each ECU.