Brake Override System [11/2021 - ]: Description

WARNING: This page is about a different car, the 2025 Lexus NX 350, 2024 Lexus NX 350, 2023 Lexus NX 350, and 2022 Lexus NX 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 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.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.

Example:

Drive at 10 km/h (6.25 mph), depress the accelerator pedal by 1/2 to 3/4 and keep it in that position. Under these conditions, if the engine speed decreases to 1000 rpm when the brake pedal is depressed, then the brake override system has been activated.