Brake System Warning Light And Buzzer - Lexus GX470 2004 Repair Manual

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GAUGES, METERS AND SERVICE REMINDER INDICATORS
(a) Brake System Warning Light and Buzzer
This light comes on in the following cases when the ignition key
is in the "ON" position.
D When the parking brake is applied...
This light comes on for a few seconds when the ignition key is
in the "ON" position even after the parking brake is released.
D When the brake fluid level is low...
CAUTION
It is dangerous to continue driving normally when the
brake fluid level is low.
D When the hydraulic brake booster fails...
If the hydraulic booster causes a problem resulting in poor
braking performance, the warning light comes on and buzzer
sounds continuously.
Have your vehicle checked at your Lexus dealer in the
following cases:
D The light does not come on even if the parking brake is
applied when the ignition key is in the "ON" position.
D The light does not come on even if the ignition key is turned
on with the parking brake released.
A warning light turning on briefly during operation does not
indicate a problem.
64
CAUTION
If any of the following conditions occurs, immediately
stop your vehicle at a safe place and contact your Lexus
dealer.
D The light does not turn off even after the parking
brake is released while the engine is running.
D The warning buzzer comes on together with the
warning light.
In either case, this can indicate that the brakes may not
work properly and your stopping distance will become
longer. Depress the brake pedal firmly and bring the
vehicle to an immediate stop.
D The brake system warning light remains on together
with the "ABS" warning light.
In this case, not only the anti-lock brake system will fail,
but also the vehicle will become extremely unstable
during braking.

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