Brake System; Brake Booster - Lexus GX470 2006 Service Manual

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Depressing the brake pedal repeatedly may turn on the light.
It is normal if it goes out after a few seconds.
If the "VSC TRAC" warning light and slip indicator light comes
on while driving, the system does not work. However, as
normal braking operates when being applied, it is no problem
to continue your driving.
In the following cases, contact your Lexus dealer:
D The warning light does not come on after the ignition key is
turned to "ON".
D The warning light remains on after the ignition key is turned
to "ON".
D The warning light comes on while driving.

BRAKE SYSTEM

This brake system has 2 independent hydraulic circuits. If
either circuit should fail, the other will still work. However, the
pedal will be harder to press, and your stopping distance will
increase. Also, the brake system warning light may come on.
Do not drive your vehicle with only a single brake
system. Have your brakes fixed immediately.

Brake booster

The brake booster uses brake fluid pressurized by the pump
to power assist the brakes. If the brake booster fails during
driving, the brake system warning light comes on and buzzer
sounds continuously. In this case, the brakes may not work
properly. If they do not work well, depress the brake pedal
firmly. If the brake system warning light comes on, immediately
stop your vehicle and contact your Lexus dealer.
The brake system warning light may stay on for about 60
seconds after the ignition key is turned to the "ON" position. It
is normal if the light turns off after a while.
Depressing the brake pedal repeatedly may turn on the brake
system warning light and buzzer. It is normal if the light goes
out and the buzzer stops sounding after a few seconds.
I n f o r ma t i o n P r o v i d e d b y :
STARTING AND DRIVING
CAUTION
383

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