Brake Override System [09/2019 - 09/2020]: Description
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2024 Lexus IS 350, 2024 Lexus IS 300, 2023 Lexus IS 350, 2023 Lexus IS 300, and 2022 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
When the vehicle is being driven, depressing the accelerator pedal sensor assembly and brake pedal will activate the brake override system to restrict engine output. The conditions for activating the brake override system as well as the items that are controlled are explained below.
Activation Conditions:
- When the accelerator pedal and brake pedal are depressed.NOTE:
The vehicle may not enter the brake override system control due to the relation of the accelerator pedal angle and the vehicle's speed.
Items Controlled:
- When the vehicle speed is extremely low, the accelerator opening value used when controlling the engine is reduced more than normal.
HINT:
During control, the Accelerator Position value in the Data List will be lower than normal.
- When the vehicle speed is not extremely low, the accelerator opening value is forcibly lowered to a fixed value.
HINT:
- During control, the Accelerator Position value in the Data List is forcibly reduced to a specified value regardless of the actual accelerator opening value (Accelerator Position Sensor No. 1 Voltage %).
- During brake override system control, the operation indicator is displayed on the meter.
Deactivation Conditions:
- When the brake pedal or the accelerator pedal returns to some degree.