Driving Assist Systems; Abs (Anti-Lock Brake System); Vsc (Vehicle Stability Control); Trac (Traction Control) - Lexus RX 450H Owner's Manual

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4-5. Using the driving support systems

Driving assist systems

To help enhance driving safety and performance, the following systems oper-

ate automatically in response to various driving situations. Be aware, however,

that these systems are supplementary and should not be relied upon too heav-

ily when operating the vehicle.

ECB (Electronically Controlled Brake System)

The electronically controlled system generates braking force corresponding

to the brake operation

Helps to prevent wheel lock when the brakes are applied suddenly, or if the

brakes are applied while driving on a slippery road surface

Brake assist

Generates an increased level of braking force after the brake pedal is

depressed when the system detects a panic stop situation

Helps the driver to control skidding when swerving suddenly or turning on

slippery road surfaces.

Enhanced VSC (Enhanced Vehicle Stability Control)

Provides cooperative control of the ABS, TRAC, VSC and EPS.

Helps to maintain directional stability when swerving on slippery road sur-

faces by controlling steering performance.

Trailer Sway Control

Helps the driver to control trailer sway by selectively applying brake pressure

for individual wheels and reducing driving torque when trailer sway is

Helps to maintain drive power and prevent the drive wheels from spinning

when starting the vehicle or accelerating on slippery roads

Hill-start assist control

Helps to reduce the backward movement of the vehicle when starting on an

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