brake LEXUS RX330 2006 Service Manual
[x] Cancel search | Manufacturer: LEXUS, Model Year: 2006, Model line: RX330, Model: LEXUS RX330 2006Pages: 651, PDF Size: 10.14 MB
Page 450 of 651
STARTING AND DRIVING
429
CAUTION
Braking control will not ensure that your vehicle will
reduce speed appropriately. You must depress the
brake pedal to slow down, in order to avoid a collision
or to maintain sufficient vehicle to vehicle distance.
(j) Approach warning
While you are cruising in the vehicle−to−vehicle distance
control mode, if the vehicle ahead decelerates abruptly or if
another vehicle cuts in ahead of you, your vehicle may come
closer to the vehicle ahead. The display will flash and beep to
alert you.
CAUTION
If the display flashes and beeps, this indicates that
you must depress the brake pedal in order to slow
down sufficiently to avoid a collision or maintain
appropriate vehicle to vehicle distance.
In the following conditions, the approach warning
may not turn on even if the vehicle drives closer to the
vehicle ahead, and an accident may occur:
Your vehicle and the vehicle ahead are cruising at
almost the same speed.
The vehicle ahead is cruising at a faster speed than
yours. (The distance between the vehicles will
become longer.)
The vehicle ahead is at a stop or driving very slowly.
Pay special attention to a very slow vehicle at the end
of the line in heavy traffic or at a tollgate.
The speed has just been set.
The accelerator pedal is depressed or has just been
released.
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435
(b) Setting the cruising speed
With automatic transmission (standard type) —
The transmission must be in “D” before you set the cruising
speed.
With automatic transmission (multi
−mode type) —
The transmission must be in “D”, “5” (fifth range) or “\
4” (fourth
range) before you set the cruising speed.
Bring your vehicle to the desired speed, push the lever down
in the “− SET” direction and release it. This sets the vehicle at
that speed and the display shows the preset speed. You can
now take your foot off the accelerator pedal.
If you need to accelerate — for example, when passing —
depress the accelerator pedal enough for the vehicle to exceed
the preset speed. When you release the accelerator pedal, the
vehicle will return to the speed set prior to acceleration. You cannot set a desired speed if the master warning light
comes on, the alarm sounds and the display indicates the
warning
code “E3”. If this code appears on the display, see “(g)
Conventional cruise control mode failure warning” on page
437.
(c) Cancelling the conventional cruise control mode
The conventional cruise control mode may be temporarily
cancelled by the driver or by the system itself under certain
circumstances. T emporary cancellation allows the set cruising
speed to remain in memory.
The conventional cruise control mode can be temporarily
cancelled by doing the following:
Pulling the lever in the “CANCEL” direction and releasing it
Depressing the brake pedal
Under certain circumstances, the conventional cruise control
mode is temporarily cancelled:
When vehicle speed falls below 40 km (25 mph)
When vehicle stability control is activated
When vehicle speed drops 16 km/h (10 mph) below the set
speed, the conventional cruise control mode is cancelled and
the set speed is erased from memory.
The “CRUISE” indicator light remains on to indicate that the
system is still in operation.
Page 457 of 651
STARTING AND DRIVING
436To turn the system off, push the “ON
−OFF” button. Make sure
the “CRUISE” indicator light is off.
If the conventional cruise control mode automatically cancels
out other than for the above cases, have your vehicle checked
by your Lexus dealer at the earliest opportunity.
(d) Resuming the conventional cruise control mode
If the conventional cruise control mode is temporarily
cancelled, the cruising speed can be resumed by pushing the
lever up in the “+ RES” direction.
Vehicle speed must be above 40 km/h (25 mph).
(e) Resetting to a faster speed
Push the lever up in the “+ RES” direction and hold it. Release
the lever when the desired speed is attained. While the lever
is held up, the vehicle will gradually gain speed.
When the difference between the actual vehicle speed and the
set speed is less than 5 km/h (3 mph), the set speed can be
increased 1.6 km/h (1 mph) each time by pushing the lever up
in the “+ RES” direction quickly within 0.6 seconds.
However, a faster way to reset is to accelerate the vehicle and
then push the lever down in the “ − SET” direction. (f) Resetting to a slower speed
Push the lever down in the “
− SET” direction and hold it.
Release the lever when the desired speed is attained. While
the lever is held down, the vehicle speed will gradually
decrease.
When the difference between the actual vehicle speed and the
set speed is less than 5 km/h (3 mph), the set speed can be
lowered 1.6 km/h (1 mph) each time by pushing the lever down
in the “− SET” direction quickly within 0.6 seconds.
However, a faster way to reset is to accelerate the vehicle and
then push the lever down in the “ − SET” direction.
With automatic transmission (standard type) —
Even if you downshift from “D” to “4” in the conventional cruise
control mode, engine braking will not be enabled because this
mode is not cancelled. To decrease the vehicle’s speed, reset
to a slower speed with the cruise control lever or depress the
brake pedal. If you use the brake pedal, cruise control is
cancelled.
With automatic transmission (multi −mode type) —
Even if you downshift from “D” or “5” (fifth range) to “4” (fourth
range) in the conventional cruise control mode, engine braking
will not be enabled because this mode is not cancelled. To
decrease the vehicle’s speed, reset to a slower speed with the
cruise control lever or depress the brake pedal. If you use the
brake pedal, cruise control is cancelled.
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Normal driving mode
Slip indicator light
Leave the system on during the ordinary driving so that it
can operate when needed.
You may hear a sound in the engine compartment for a few
seconds just after the vehicle begins to move. This means that
the traction control system is in the self− check mode, but does
not indicate a malfunction. When the traction control system is operating, the following
conditions occur:
The system controls the spinning of the front wheels. At this
time, the slip indicator light blinks.
You may feel vibration or noise in your vehicle, caused by
operation of the brakes. This indicates the system is
functioning properly.
The slip indicator light comes on for a few seconds when the
ignition key is turned to “ON”. If the indicator light does not
come on when the ignition is turned on, contact your Lexus
dealer.
Page 475 of 651
STARTING AND DRIVING
454When the traction control system is operating, the following
conditions occur:
The system controls the spinning of the 4 wheels. At this
time, the slip indicator light blinks.
You may feel vibration or noise in your vehicle, caused by
operation of the brakes. This indicates the system is
functioning properly.
The slip indicator light comes on for a few seconds when the
ignition key is turned to “ON”. If the indicator light does not
come on when the ignition is turned on, contact your Lexus
dealer.
“VSC” warning light
This light warns that there is a problem somewhere in the
vehicle stability control system or traction control system.
The light will come on when the ignition key is turned to “ON”
and will go off after a few seconds.
If the light comes on while driving, the vehicle stability control
system and traction control system do not work. However, as
conventional braking operates when applied, there is no
problem to continue your driving.
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In the following cases, contact your Lexus dealer:
The warning light does not come on after the ignition key is
turned to “ON”.
The warning light remains on after the ignition key is turned
to “ON”.
The warning light comes on while driving.
VEHICLE STABILITY CONTROL
SYSTEM
The vehicle stability control system helps provide
comprehensive control of the systems such as anti lock
brake system, traction control, engine control, etc. This
system automatically controls the brakes and engine to
help prevent the vehicle from skidding when cornering on
a slippery road surface or operating steering wheel
abruptly.
This system activates when the vehicle speed is about more
than 15 km/h (9 mph).
You may hear a sound in the engine compartment for a few
seconds just after the vehicle begins to move. This means that
the system is in the self −check mode, but does not indicate a
malfunction.
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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 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 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 reserved vacuum for one or two stops but no more!
CAUTION
Do not pump the brake pedal if the engine stalls.
Each push on the pedal uses up your reserved
vacuum.
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 increase.
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Anti lock brake system
The anti lock brake system is designed to help prevent
lock up of the wheels during a sudden braking or braking
on slippery road surfaces. This assists in providing
directional stability and steering performance of the
vehicle under these circumstances.
Effective way to press the ABS brake pedal: When the
anti−lock brake system function is in action, you may feel the
brake pedal pulsating and hear a noise. In this situation, to
let the anti−lock brake system work for you, just hold the
brake pedal down more firmly. Do not pump the brake in a
panic stop. This will result in reduced braking performance.
The anti−lock brake system becomes operative after the
vehicle has accelerated to a speed in excess of approximately
10 km/h (6 mph). It stops operating when the vehicle
decelerates to a speed below approximately 5 km/h (3 mph).
Depressing the brake pedal on slippery road surfaces such as
on a manhole cover, a steel plate at a construction site, joints
in a bridge, etc. on a rainy day tends to activate the anti −lock
brake system.
You may hear a click or motor sound in the engine
compartment for a few seconds just after the vehicle begins to
move. This means that the anti −lock brake system is in the
self−check mode, and does not indicate a malfunction. When the anti lock brake system is activated, the
following conditions may occur. They do not indicate a
malfunction of the system:
You may hear the anti −lock brake system operating and feel
the brake pedal pulsating and the vibrations of the vehicle
body and steering wheel. You may also hear the motor
sound in the engine compartment even after the vehicle is
stopped.
At the end of the anti−lock brake system activation, the
brake pedal may move a little forward.
CAUTION
Do not overestimate the anti lock brake system:
Although the anti lock brake system assists in
providing vehicle control, it is still important to drive
with all due care and maintain a moderate speed and
safe distance from the vehicle in front of you, because
there are limits to the vehicle stability and effectiveness
of steering wheel operation even with the anti lock
brake system on.
If tire grip performance exceeds its capability, or if
hydroplaning occurs during high speed driving in the
rain, the anti lock brake system does not provide
vehicle control.
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Anti lock brake system is not designed to shorten the
stopping distance: Always drive at a moderate speed
and maintain a safe distance from the vehicle in front of
you. Compared with vehicles without an anti lock
brake system, your vehicle may require a longer
stopping distance in the following cases:
Driving on rough, gravel or snow covered roads.
Driving with tire chains installed.
Driving over the steps such as the joints on the road.
Driving on roads where the road surface is pitted or
has other differences in surface height.
Install all 4 tires of specified size at appropriate
pressure: The anti lock brake system detects vehicle
speeds u sing the speed sensors for respective wheels’
turning speeds. The use of tires other than specified
may fail to detect the accurate turning speed resulting
in a longer stopping distance.“ABS” warning light
1U.S.A.2Canada
The light comes on when the ignition key is turned to the “ON”
position. If the anti−lock brake system and the brake assist
system work properly, the light turns off after a few seconds.
Thereafter, if either of the systems malfunctions, the light
comes on again.
When the “ABS” warning light is on (and the brake system
warning light is off), the anti −lock brake system, the brake
assist system, the traction control system and the vehicle
stability control system do not operate, but the brake system
still operates conventionally.
When the “ABS” warning light is on (and the brake system
warning light is off), the anti−lock brake system does not
operate so that the wheels could lock up during a sudden
braking or braking on slippery road surfaces.
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If either of the following conditions occurs, this indicates
a malfunction somewhere in the components monitored
by the warning light system. Contact your Lexus dealer as
soon as possible to service the vehicle.
The light does not come on when the ignition key is turned
to the “ON” position, or remains on.
The light comes on while you are driving.
A warning light turning on briefly during operation does not
indicate a problem.
CAUTION
If the “ABS” warning light remains on together with the
brake system warning light, immediately stop your
vehicle at a safe place and contact your Lexus dealer.
In this case, not only the anti lock brake system will fail
but also the vehicle will become extremely unstable
during braking.
Drum in disc type parking brake system
Your vehicle has a drum−in−disc type parking brake system.
This type of brake system needs bedding −down of the brake
shoes periodically or whenever the parking brake shoes and/or
drums are replaced.
Have your Lexus dealer perform the bedding −down.