Driving Assist Systems; Ecb (Electronically Controlled Brake System); Abs (Anti-Lock Brake System); Vsc (Vehicle Stability Control) - Lexus rx450h Service Manual

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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

heavily when operating the vehicle.

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.

TRAC (Traction Control)

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

Prevents the vehicle from rolling backward when starting on an incline or slip-

EPS (Electric Power Steering)

Employs an electric motor to reduce the amount of effort needed to turn the

steering wheel

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4-5. Using the driving support systems