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.
CASE 1
Difference of main throttle position and sub throttle position
0.3 V or higher
CASE 2
Stop light switch signal (CPU) and stop light switch signal (Monitor IC)