Kick Down Switch Circuit [09/2014 - 11/2017]: Description
WARNING: This page is about a different car, the 2017 Lexus RC 350, 2016 Lexus RC 350, and 2015 Lexus RC 350. 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.