Lexus RX400h2006, Owner'S Manual

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STARTING AND DRIVING
452
BRAKE SYSTEM
Regenerative brake
When the brake is applied, the motor generator converts
kinetic energy into electric energy.
The regenerative brake works in the following operations.
1. When the accelerator pedal is released, the reduced speed
equal to engine braking in a gasoline
−
fueled vehicle is
obtained in accordance with the running mode position of the
selector lever.
2. When the brake pedal is depressed with the selector lever
in “D” or “B”, the regenerative brake works.
Hydraulic brake
This brake system has 3 independent hydraulic circuits. If any
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.
CAUTION
Do not drive your vehicle with only a single brake
system. Have your brakes fixed immediately.
Brake actuator
The brake actuator uses brake fluid pressurized by the pump
to power
−
assist the brakes. If the brake actuator fails during
driving, the brake system warning light comes on and the
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 red and yellow brake system warning lights may stay on
for about 60 seconds after the ignition is turned on. It is normal
if the light turns off after a while.
Depressing the brake pedal repeatedly may turn on the red
brake system warning light and buzzer. It is normal if the light
turns off and the buzzer stops sounding after a few seconds.
You may hear a small sound in the engine compartment after
the hybrid system is started or the brake pedal is depressed
repeatedly. This is a pump pulsating sound of the brake
system, and it is not a malfunction.
In the following conditions, you may hear a sound in the engine
compartment.
The brake pedal is depressed when the hybrid system is
turned off.
The driver’s door is opened.
For a few seconds after the hybrid system is off and about
90 seconds have passed.
The brake pedal stroke may be short when you turn the ignition
on with the brake pedal depressed.