Brake System; Brake Booster - Lexus LS400 Owner's Manual

Table of Contents

Advertisement

STARTING AND DRIVING
CAUTION
D Do not rely excessively on the vehicle skid control system.
Even if the vehicle skid control system is operating, it is not
that your vehicle is absolutely safe. Reckless driving will
result in an unexpected accident. Always keep safety
driving in mind. If the slip indicator light flashes, sounding
an alarm, special care should be taken while driving.
D Only use tires of specified size. The size, manufacturer,
brand and tread pattern for all 4 tires should be the same.
If you use the tires other than specified, or different type or
size, the vehicle skid control system may not function
correctly. When replacing the tires or wheels, contact your
Lexus dealer.
176

BRAKE SYSTEM

The tandem master cylinder brake system is a hydraulic system with
two separate sub−systems. If either sub−system should fail, the other
will still work. However, the pedal will be harder to press, and your
stopping distance will be longer. Also, the brake system warning
light may come on.
CAUTION
Do not drive your vehicle with only a single brake system.
Have your brakes fixed immediately.

Brake booster

The brake booster uses engine vacuum to power−assist the brakes.
If the engine should quit while you are driving, you can bring the
vehicle to a stop with normal pedal pressure. There is enough
reserve vacuum for one or two stops but no more!
CAUTION
D Do not pump the brake pedal if the engine stalls. Each push
on the pedal uses up your vacuum reserve.
D Even if the power assist is completely lost, the brakes will
still work. But you will have to push the pedal hard − much
harder than normal. And your braking distance will be
longer.

Advertisement

Table of Contents
loading

Table of Contents