ABS Lexus GS430 2006 Scheduled Maintenance Guide / LEXUS 2006 GS430/GS300 FROM JAN. 2005 PROD. OWNER'S MANUAL (OM30649U)

GAUGES, METERS AND SERVICE REMINDER INDICATORS
75
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 this 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 “ABS” warning light.
In this case, not only the antilock brake system will
fail but also the vehicle will become extremely
unstable during braking.
GS430 only—Any of the following conditions may occur,
but do not indicate the malfunction:
The light may stay on for about 60 seconds after the engine
is started. It is normal if it turns off after a while.
 Depressing the brake pedal repeatedly may turn on the
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 engine 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.
(b) Brake System Warning Light (yellow)
The light comes on when the engine switch is selected in
“IG−ON” mode.
GS430—If the engine is started, and the traction control
system, vehicle stability control system and hill −start assist
control system work properly, the light turns off after a few
seconds. Thereafter, if any part of the system malfunctions,
the light comes on again.
GS300—If the engine switch is selected in “IG −ON” mode, and
the traction control system, vehicle stability control system and
hill −start assist control system work properly, the light turns off
after a few seconds. Thereafter, if any part of the system
malfunctions, the light comes on again.
Although it is no problem to continue driving, have your vehicle
checked by your Lexus dealer as soon as possible.
(c) Driver’s Seat Belt Reminder Light and Buzzer
The light and buzzer act as a reminder to have the driver buckle
up the seat belt.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
78At this time, vibration may occur. However, if you depress the
accelerator pedal more firmly and slowly, you can drive your
vehicle at low speeds. Have your vehicle checked by your
Lexus dealer as soon as possible.
Even if the abnormality 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 engine switch is
selected in “ACC” or “OFF” mode.
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 “Emissions inspection and maintenance (I/M)
programs” on page 497.
(h) Master Warning Light
If any system malfunctions, this warning light comes on or
flashes together with a warning tone, and a warning message
appears on the multi−information display. When the cause of
the problem is eliminated, the warning tone and message on
the display will turn off.
(i) ”ABS” Warning Light
The light comes on when the engine switch is selected in
“IG−ON” mode.
GS430—If the anti−lock brake system and the brake assist
system work properly, the light turns of f in a few seconds after
the engine is started. Thereafter, if either system malfunctions,
the light comes on again.
GS300—If the anti−lock brake system and the brake assist
system work properly, the light turns of f in a few seconds after
the engine switch is selected in “IG−ON” mode. Thereafter, if
either system malfunctions, the light comes on again.
When the “ABS” warning light is on, the anti− lock brake system
and the brake assist system do not operate, but the brake
system still operates conventionally.
If either of the following conditions occur, 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 engine switch is
selected in “IG −ON” mode.
 The light remains on after the engine is started (GS430), or
remains on after the engine switch is selected in “IG −ON”
mode (GS300).
 The light comes on while you are driving.
A warning light turning on briefly during operation does not
indicate a problem.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
79
CAUTION
If the “ABS” warning light remains on together with the
brake system warning light (red), immediately stop your
vehicle at a safe place and contact your Lexus dealer.
In this case, not only the antilock brake system will fail
but also the vehicle will become extremely unstable
during braking.
GS430 only—Either of the following conditions may
occur, but does not indicate a malfunction:
 The light may stay on for about 60 seconds after the engine
is started. It is normal if it turns off after a while.
 Depressing the brake pedal repeatedly may turn on the
light. It is normal if it turns off after a few seconds.
(j) Open Door Warning Light
This light remains on until all the doors are completely closed.
(k) Adaptive Front Lighting System Off
Indicator Light
This light comes on when yo u turn off the Adaptive Front
Lighting System (AFS) by pushing the “AFS OFF” switch.
If there is a problem somewhere in the Adaptive Front Lighting
System (AFS) or automatic headlight leveling system, the light
flashes. At this time, both systems do not operate properly.
Although it is no problem to continue driving, have your vehicle
checked by your Lexus dealer as soon as possible.
(l) Low tire pressure warning light
This light comes on when the engine switch is selected in
“IG−ON” mode. If the tire pressure warning system works
properly and tire inflation pressure is appropriate, the light
goes off after a few seconds.
This light comes on or flashes in the following cases when the
engine switch is selected in “IG −ON” mode.
 When the low tire inflation pressure is detected while
driving...
If any tire has low inflation pressure, the light comes on.
The light goes off after the tire inflation pressure is adjusted
to a specified level.
 When initializing the system...
If initialization is completed, the light blinks three times.
 When the system malfunctions...
If the system malfunctions, the light blinks.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
89
Electronic Brake System Failure Warning
G13100

G13028
GS430 GS300
If the above message appears and the brake system
warning light (yellow) comes on, the following systems do
not operate. (GS430 only—In some cases, the
multiinformation display shows either “CHECK VSC” or
“CHECK ECB” only.)
 Traction control system
 Vehicle stability control system
 Hill− start assist control system
If the above message appears and the brake system
warning light (yellow) and “ABS” warning light come on,
the following systems do not operate. (GS430 only—In
some cases, the multiinformation display shows either
“CHECK VSC” or “CHECK ECB” only.)
 Anti− lock brake system
 Brake assist system
Although it is no problem to continue driving, have your vehicle
checked by your Lexus dealer as soon as possible.
 Variable Gear Ratio Steering System Warning
(GS430 only)
G13027
If there is a problem in the variable gear ratio steering
system, the master warning light comes on and the above
message appears.
If this message appears, the system does not work. Although
it is no problem to continue driving, have your vehicle checked
by your Lexus dealer as soon as possible.
 FourWheel Drive System Warning (Fourwheel
drive models only)
G13021
If there is a problem in the fourwheel drive system, the
master warning light comes on, a warning tone sounds
and the above message appears.
If the above warning message appears, have your vehicle
checked by your Lexus dealer as soon as possible.

OCCUPANT RESTRAINT SYSTEMS
162The front airbag sensors constantly monitor the forward
deceleration of the vehicle. If an impact results in a forward
deceleration beyond the designed threshold level, the system
triggers
the airbag 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 between 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, lower portion
of instrument panel, dashboard 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.

TOUCH SCREEN
237
G18021
When a telephone number regi stered in phone book is
received, the name and the number is displayed.
 Received calls which you did not answer are also
memorized in the system and “Abs.” is displayed on the left
side of the number.
 Unnotified telephone number such as a public telephone is
not memorized in the system.
3. Select the desired number from the list.
G18019
Touch “” or push of the telephone button.
 An international phone call may not be made depending on
the cellular phone which you have.

AIR CONDITIONING
271
5. Pull the filter cover toward you.
G21020
6. Push the tabs and pull the filter case toward you.
G21021
7. Take out the filter.
G21022
8. Remove the filter from the filter case.
9. Inspect the filter on the surface.
If it is dirty, it should be replaced.
NOTICE
When setting the filter to the filter case, the UP marks
shown on the filter and filter case should be noted and
fitted as shown.
INFORMATION
The air conditioning filter should be installed properly
in position. The use of air conditioning with the filter
removed may cause deteriorated dustproof perfor-
mance and then affect air conditioning performance.

STARTING AND DRIVING
378The intuitive parking assist may not detect the following:

Thin objects such as wire or rope
 Sound wave absorbing objects such as cotton or snow
 Objects with a sharp edge
 Tall objects with the upper part projected
 Shorter objects
Intuitive parking assist failure warning
If an error is detected when the intuitive parking assist is
turned on, the vehicle symbol comes on or flashes with
beeping sounds.
At this time steering guidance is temporarily stopped.
However, the sensors functioning properly continue their
obstacle detection. For details, see “When the detection range
of the sensors is shorter” on page 381.
The intuitive parking assist failure warning display is not given
in either of the following operations:
 Changing to another screen
 Turning off the main switch for the intuitive parking assist

STARTING AND DRIVING
428
Antilock brake system
The antilock brake system is designed to automatically
help prevent lockup 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 antilock 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.

STARTING AND DRIVING
430“ABS” warning light
G31080
 1
U.S.A. 2Canada
GS430—The light comes on when the engine switch is
selected in “IG −ON” mode. If the anti −lock brake system and
the brake assist system work properly, the light turns off in a
few seconds after the engine is started.
GS300—The light comes on for a few seconds when the
engine switch is selected in “IG −ON” mode. It indicates the
anti− lock brake system and the brake assist system work
properly.
If either system malfunctions, the light comes on again.
When the “ABS” warning light is on, the anti− lock brake system
and the brake assist system do not operate, but the brake
system still operates conventionally. If either of the following conditions occur, 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 engine switch is selected
in “IG− ON” mode.
 The light remains on after the engine is started (GS430), or
remains on after the engine switch is selected in “IG −ON”
mode (GS300).
 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 (red), immediately stop your
vehicle at a safe place and contact your Lexus dealer.
In this case, not only the antilock brake system will fail
but also the vehicle will become extremely unstable
during braking.
GS430 only—Either of the following conditions may
occur, but does not indicate a malfunction:
 The light may stay on for about 60 seconds after the engine
is started. It is normal if it turns off after a while.
 Depressing the brake pedal repeatedly may turn on the
light. It is normal if it turns off after a few seconds.