ABS Lexus IS300 2004 Electrical Components / LEXUS 2004 IS300 OWNER'S MANUAL (OM53461U)

GAUGES, METERS AND SERVICE REMINDER INDICATORS
50
(a) Brake System Warning Light and Buzzer
This light comes on in the following cases when the ignition key
is in the ºONº position.
 When the parking brake is applied ...
This light comes on for a few seconds when the ignition key is
turned to the ºONº position even after the parking brake is
released.
If you drive your vehicle without releasing the parking brake,
the buzzer sounds.
 When the brake fluid level is low ...
CAUTION
It is dangerous to continue driving normally when the
brake fluid level is low.
Have your vehicle checked at your Lexus dealer in the
following cases:
The light does not come on even if the parking brake is
applied when the ignition key is in the ºONº position.
 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.
CAUTION
If either of the following conditions occurs, immediately
stop your vehicle at a safe place and contact your Lexus
dealer.
 The light does not turn off even after the parking
brake is released while the engine is running.
In the case, 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.
 The brake system warning light remains on together
with the ºABSº 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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GAUGES, METERS AND SERVICE REMINDER INDICATORS
54
(i) Malfunction Indicator Lamp
This lamp comes on when the ignition key is turned to the
ºONº position and goes off after the engine starts. This
means that the warning light system is operating properly.
If the lamp remains on, or the lamp comes on while
driving, first check the followings.
 Empty fuel tank
If the fuel tank is empty, refuel immediately.
 Loose fuel tank cap
If the fuel tank cap is loose, securely tighten it.
These cases are temporary malfunctions. The malfunction
indicator lamp will go off after taking several driving trips.
If the lamp will not go off even after the several trips, contact
your Lexus dealer as soon as possible.
If the fuel tank is not empty or the fuel tank cap is not
loose...
 There is a problem somewhere in the engine, emission
control system, electronic throttle control system, automatic
transmission electrical system or warning light system itself.
Contact your Lexus dealer as soon as possible to service the
vehicle.
If this lamp comes on and the engine speed does not increase
with the accelerator pedal depressed down to about the middle
position, there may be a problem somewhere in your electronic
throttle control system. At this time, if you depress the accelerator pedal more firmly
and slowly, you can drive your vehicle at low speeds. Have
your
Lexus checked by your Lexus dealer as soon as possible.
Even if the abnorma lity of the electronic throttle control system
is corrected during low speed driving, the system may not be
recovered until the engine is stopped and the ignition key is
turned to ºACCº or ºLOCKº position.
CAUTION
Be especially careful to prevent erroneous pedal
operation.
Emissions Inspection and Maintenance (I/M) programs
Your vehicle may not pass a state emission inspection if the
malfunction indicator lamp remains on. Contact your Lexus
dealer to check your vehicle's emission control system and
OBD (On-Board Diagnostics) system before taking your
vehicle for the inspection.
For details, see ºEmissions Inspection and Maintenance (I/M)
programsº on page 313.
(j) ºABSº Warning Light
The light comes on when the ignition key is turned to the ºONº
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.
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GAUGES, METERS AND SERVICE REMINDER INDICATORS
55
When the ºABSº 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/or the vehicle
stability control system do not operate, but the brake system
still operates conventionally.
When the ºABSº warning light is on (and the brake system
warning light is off), the anti-lock brake system and/or the
traction
control system do/does not operate so that the wheels
could lock up during a sudden braking or braking on slippery
road surfaces.
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 ºONº 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 ºABSº 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.
(k) Open Door Warning Light
This light remains on until all the doors are completely closed.
(l) Rear Light Failure Warning Light
If this light comes on when the headlight switch is turned on (at
the first or second clickstop), it indicates that one or more of the
tail lights are burned out.
If it comes on when the brake pedal is depressed, one or more
stop lights are burned out.
Have defective bulbs replaced as soon as possible.
(m) Low Fuel Level Warning Light
This light comes on when the fuel level in the tank becomes
nearly empty. Fill the tank as soon as possible.
On inclines or curves, due to the movement of fuel in the tank,
the low fuel level warning light may come on earlier than usual.
(n) ºTRAC OFFº Indicator / Warning Lights
This light comes on when the ignition key is turned to ºONº, and
will go off after a few seconds. This means that the system is
operating properly.
If one 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 after the ignition key is turned
to ºONº.
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OCCUPANT RESTRAINT SYSTEMS
106
SV16107
3Insert these tabs in the hollow of the seat belt cover, pull
it up and hook it while pressing the ºPUSHº mark.
Seat belt must be stowed before you fold the seatback. (See
ºFold-down rear seatsº on page 105.)
NOTICE
The seat belt must be stowed before you fold the seat- back.
Folding down rear seats
SV16103
Lower the head restraints to the lowest position, unlock
the seatbacks by pushing the lock release button on the
side of the seatback and fold them down.
When returning the rear seats to their original position, lift
up the seatbacks until they lock.
CAUTION
When returning seats to their original position:
 Make sure the seat belts are not twisted or caught
under the seat and are arranged in their proper posi-
tion and are ready to use.
 Make sure the seat is securely locked by pushing
forward and rearward on the top of the seatback.
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OCCUPANT RESTRAINT SYSTEMS
11 5
SV16088
Two buckles and tabs for rear center seat belt.
The 2 buckles for the rear center seat belt are distinguished
with colors of the buckle release button. Also the 2 tabs have
different shape for its end so that the belt is not buckled in the
wrong place.
1Buckle with light gray buckle-release button -
Properly matches with concave end tab
2Buckle with red buckle-release button - Properly
matches with round end tab
CAUTION
Make sure the both buckles are correctly located and
securely latched. Failure to properly match the buckle
and tab may cause serious injury in case of an accident
or a collision.
SV16089
To release the concave end tab, insert the key into the hole on
buckle (with light gray buckle-release button ) and allow the
belt to retract.
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OCCUPANT RESTRAINT SYSTEMS
11 7
SV16106
2Wrap up the concave end tab and the round end tab lined
upon each other.
SV16107
3Insert these tabs in the hollow of the seat belt cover, pull
it up and hook it while pressing the ºPushº mark.
Seat belt must be stowed before you fold the seatback. (See
ºFold-down rear seatsº on page 105.)
NOTICE
Stow the rear center seat belt except when you are wear-
ing it.
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OCCUPANT RESTRAINT SYSTEMS
11 8
Pulling out the rear center seat belt
SV16108
To use the rear center seat belt, press ºPUSHº mark and
pull out the tabs.
Seat belt extender
If your seat belts cannot be fastened securely because they
are not long enough, a personalized seat belt extender is
available from your Lexus dealer free of charge.
Please contact your local Lexus dealer to order the proper
required length for the extender. Bring the heaviest coat you
expect to wear for proper measurement and selection of
length. Additional ordering information is available at your
Lexus dealer.
CAUTION
When using the seat belt extender, observe the
following precautions. Failure to follow these
instructions could reduce the effectiveness of the seat
belt restraint system in case of an accident, increasing
the chance of personal injury.
Remember that the extender provided for you may
not be safe when used on a different vehicle, for
another person or at a different seating position than
the one originally intended.
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OCCUPANT RESTRAINT SYSTEMS
127
SV16180

1Airbag module for front passenger (airbag and inflator)
2Airbag module for driver (airbag and inflator)
3SRS warning light
4Airbag sensor assembly
5Front airbag sensors
The SRS front airbag system consists mainly of the above
components, and their locations are shown in the illustration.
The airbag sensor assembly consists of a safing sensor and
airbag sensors.
The front airbag sensors constantly monitor the forward
deceleration of the vehicle. In an impact results in a forward
deceleration beyond the designed threshold level, the system
triggers the ai rbag inflators. At this time a chemical reaction in
the inflators very quickly fills the airbags with non-toxic gas to
help restrain the forward motion of the occupants. The front
airbags then quickly deflate, so that there is no obstruction of
the driver's vision should it be necessary to continue driving. When the airbags inflate, they produce a loud noise and
release some smoke and residue along with non-toxic gas.
This does not indicate a fire. This smoke may remain inside
the vehicle for some time, and may cause some minor irritation
to the eyes, skin or breathing. Be sure to wash off any residue
as soon as possible to prevent any potential skin irritation with
soap and water. If you can safely exit from the vehicle, you
should do so immediately.
Deployment of the airbags happens in a fraction of a second,
so the airbags must inflate with considerable force. While the
system is designed to reduce serious injuries, primarily to the
head and chest, it may also cause other, less severe injuries
to the face, chest, arms and hands. These are usually in the
nature of minor burns or abrasions and swelling, but the force
of a deploying airbag can cause more serious injuries,
especially if an occupant's hands, arms, chest or head is in
close
proximity to the airbag module at the time of deployment.
This is why it is important for the occupant to; avoid placing any
object or part of the body bet ween the occupant and the airbag
module; sit straight and well back into the seat; wear the
available seat belt properly; and sit as far as possible from the
airbag module, while still maintaining control of the vehicle.
Parts of the airbag module (steering wheel hub, airbag cover
and inflator) may be hot for several minutes after deployment,
so do not touch! The airbags inflate only once. The windshield
may be damaged by absorbing some of the force of the
inflating airbag.
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STARTING AND DRIVING
261
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.
Anti-lock brake system
The anti-lock brake system is designed to automatically
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 when the engine is started or
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:
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STARTING AND DRIVING
263
ºABSº warning light
SV31014

U.S.A.
SV31031

CANADA
The light comes on when the ignition key is turned to the ºONº
position. If the anti-lock brake system and the brake assist
work properly, the light turns off after a few seconds.
Thereafter, if either of the systems malfunctions, the light
comes on again.
When the ºABSº 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/or the vehicle
stability control system do not operate, but the brake system
still operates conventionally.
When the ºABSº warning light is on (and the brake system
warning light is off), the anti-lock brake system and/or the
traction
control system do/does not operate so that the wheels
could lock up during a sudden braking or braking on slippery
road surfaces.
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 ºONº 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.
03 07.09