Kick Down Switch Circuit [11/2021 - ]: Description
WARNING: This page is about a different car, the 2024 Lexus IS 500, 2023 Lexus IS 500, and 2022 Lexus IS 500. However, it is still accessible from the selected car via links, so may be relevant.
The kick down switch turns ON when the accelerator pedal is fully depressed to send a signal to the ECM.
When the kick down switch is ON, the ECM controls gear shifting according to programmed shift diagrams.
If a short circuit develops in the kick down switch assembly, the ECM disregards the kick down signals and controls shifting at the normal shift points.