Starter Signal Circuit [06/2018 - ]: Description
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 350, 2023 Lexus ES 350, 2022 Lexus ES 350, 2021 Lexus ES 350, and 2020 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
While the engine is being cranked, current flows from terminal STAR of the certification ECU (smart key ECU assembly) to the park/neutral position switch assembly and to terminal STA of the ECM (STA signal).