inflation pressure Lexus GS430 2006 Scheduled Maintenance Guide / LEXUS 2006 GS430/GS300 FROM JAN. 2006 PROD. OWNER'S MANUAL (OM30786U)

IMPORTANT INFORMATION ABOUT YOUR LEXUS
v
Accessories, spare parts and modification of
your Lexus
A wide variety of non−genuine spare parts and accessories for
Lexus vehicles are currently available in the market. You
should know that Toyota does not warrant these products and
is not responsible for their performance, repair, or
replacement, or for any damage they may cause to, or adverse
effect they may have on, your Lexus vehicle.
This vehicle should not be modified with non −genuine Lexus
products. Modification with non −genuine Lexus products
could af fect its performance, safety or durability, and may even
violate governmental regulations. In addition, damage or
performance problems resulting from the modification may not
be covered under warranty.
Spark ignition system of your Lexus
The spark ignition system in your Lexus meets all
requirements of the Canadian Interference− Causing
Equipment Standard.
Installation of a mobile twoway radio system
As the installation of a mobile two −way radio system in your
vehicle could affect electronic systems such as the multiport
fuel injection system/sequential multiport fuel injection system,
cruise control system, dynamic radar cruise control system,
anti− lock brake system, SRS airbag system and seat belt
pretensioner system, be sure to check with your Lexus dealer
for precautionary measures or special instructions regarding
installation.
Smart access system with pushbutton start
Users of any electrical medical devices such as implanted
pacemakers should consult the manufacturer of the device for
information about its operation under the influence of radio
waves. Radio waves could have unexpected effects on the
operation of such medical devices. For details, see “Keys” on
page 8 and “Smart access system with push −button start” on
page 11.
Tires and loading on your Lexus
Underinflated or overinflated tire pressure and the
excess load may result in the deterioration of steering
ability and braking ability, leading to an accident. Check
the tire inflation pressure periodically and be sure to
keep the load limits given in this Owner’s Manual. For
details about tire inflation pressure and load limits, see
page 548 and 462.
Scrapping of your Lexus
The SRS airbag and seat belt pretensioner devices in your
Lexus contain explosive c hemicals. If the vehicle is scrapped
with the airbags and seat belt pretensioners left as they are,
this may cause an accident such as fire. Be sure to have the
systems of the SRS airbag and seat belt pretensioner removed
and disposed of by a qualified service shop or by your Lexus
dealer before you scrap your vehicle.

GAS STATION INFORMATION
Fuel selection:
Premium unleaded gasoline with an Octane Rating of 91
(Research Octane Number 96) or higher required for
optimum engine performance. However, if such premium
type cannot be obtained, you may use unleaded gasoline
with an Octane Rating as low as 87 (Research Octane
Number 91).
 Fuel tank capacity:
71 L (18.7 gal., 15.6 lmp.gal.)
 Engine oil:
“Toyota Genuine Motor Oil” or equivalent
Oil grade: ILSAC multigrade engine oil.
Recommend oil viscosity − SAE 5W−30 if normal
temperatures are below 38 C (100F)
Oil capacity: L (qt., lmp.qt.)
Drain and refill with filter without filter GS430 5.1 (5.4, 4.5) 4.5 (4.8, 4.0)
GS300 (2WD) 6.3 (6.6, 5.5) 5.9 (6.2, 5.1)
GS300 (4WD) 6.4 (6.7, 5.6) 6.0 (6.3, 5.2)
See page 530 for detailed information.
 Engine coolant:
Capacity: GS430 − 10.1 L (10.7 qt., 8.9 lmp.qt.)
GS300 − 9.1 L (9.6 qt., 8.0 lmp.qt.) Coolant type −
”Toyota Super Long Life Coolant” or similar
high quality ethylene glycol based non −silicate, non −amine,
non−nitrite, and non −borate coolant with long −life hybrid
organic acid technology (Coolant with long −life hybrid
organic acid technology is a combination of low phosphates
and organic acids.)
Do not use plain water alone.
For checking the engine coolant, see page 534.
 Automatic transmission:
Fluid type − “Toyota Genuine ATF Type WS”
See page 540 or 544 for detailed information.
 Tire information:
See page 548 through 570 for detailed information.
 Tire inflation pressure:
Tire size: GS430 − 245/40R18 93Y or P245/40R18 93V
GS300 − 225/50R17 94W or P225/50R17 93V
Tire inflation pressure:
Front 230 kPa (2.3 kgf/cm
2 or bar, 33 psi)
Rear 230 kPa (2.3 kgf/cm2 or bar, 33 psi)
For sustained high speeds above 160 km/h (100 mph), in
countries where such speeds are permitted by law, add the
tire inflation pressure given below to the front tires and rear
tires, but never exceed the maximum cold tire inflation
pressure molded on the tire sidewall.
GS430 60 kPa (0.6 kgf/cm
2 or bar, 9 psi)
GS300 50 kPa (0.5 kgf/cm2 or bar, 7 psi)

GAUGES, METERS AND SERVICE REMINDER INDICATORS
75
IF THIS INDICATOR OR
BUZZER COMES ON ...
DO THIS.
(e)Take vehicle to Lexus
dealer immediately.
(f)Stop immediately and
contact Lexus dealer.
(g)orTake vehicle to Lexus
dealer.
(h)See multi− information
display.
(i)or
Take vehicle to Lexus
dealer.
If brake system
warning light (red) is
also on, stop
immediately and
contact Lexus dealer.
IF THIS INDICATOR OR BUZZER COMES ON ...DO THIS.
(j)Close all doors.
(k)WG10If flashing, take vehicle
to Lexus dealer.
(l)WG6
Adjust tire inflation
pressure.
If light remains on,
contact Lexus dealer.
(m)WG8Take vehicle to Lexus
dealer.
(n)WG7Take vehicle to Lexus
dealer.
(o)Low fuel level
warning lightFill up tank.

GAUGES, METERS AND SERVICE REMINDER INDICATORS
81
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) 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
92
Tire Pressure Warning
G13025
When the low tire inflation pressure is detected while
driving, the tire pressure warning light and master
warning light come on, and the above message appears.
Adjusting the tire inflation pressure will turn off the warning
message. If the message remains on, have your vehicle
checked by your Lexus dealer.
G13024
This message indicates the tire pressure warning system is
initialized. After replacing the tires or wheels, adjust all 4 tires
to specified tire inflation pressure and initialize the tire pressure
warning system. To initialize the system, start the engine and
push the tire pressure warning reset switch for longer than 3
seconds with the vehicle stopped. The above message
appears.
G13026
If there is a problem in the tire pressure warning system,
the tire pressure warning light blinks and master warning
light comes on, and the above message appears.
The tire pressure warning light system is not working properly.
In this case, it is probable that a tire pressure warning valve and
transmitter is malfunctioning or the system is experiencing
signal interference. In the case of signal interference, the
warning message will turn off when the interference ends. If
the tire pressure warning light blinks and master warning light
comes on, and the above message appears frequently, have
your vehicle checked by your Lexus dealer.

STARTING AND DRIVING
440
TIRE PRESSURE WARNINGSYSTEM
The tire pressure warning system warns you that the tire
inflation pressure is low.
The tire pressure warning syst em is not a substitute for
checking n ormal tire inflation pressure. Check the tire inflation
pressure with a tire pressure gauge regularly.
CAUTION
The warning system may not activate immediately if
bursts or sudden air leakage should occur.
G31003
 Tire pressure warning light
The tire pressure warning light comes on when the engine
switch “IG−ON” mode is selected, and goes off after a few
seconds. This means the tire pressure warning light is
operating properly. If the tire inflation pressure becomes low,
the light comes on again. At this time, the master warning light
comes on and the message “LOW TIRE” appears on the
multi−information display.
In this case, adjusting the tire inflation pressure will turn off the
light after a few minutes. If the light blinks, the tire pressure
warning system is not working properly. At this time, the
master warning light comes on and the message “CHECK
SYSTEM” appears on the multi −information display.

STARTING AND DRIVING
441
Display
Indicator
statusMeaningsDo this
Tire pressure
warning lightONTire inflation
pressure is
lowAdjust the tireinflation
pressure
Multi
information
displayLOW TIRE
(PRESSURE)
Tire pressure
warning lightBlinkingTire pressure
warning
system
malfunctionHave the
system
checked at
your Lexus
dealer
Multi
information
displayCHECK
(TIRE
PRES-
SURE)
SYSTEM
CAUTION
If the tire pressure warning light comes on, be sure to
observe the following precautions. Failure to do so
could cause loss of vehicle control and result in death
or serious injury.
Vehicles with runflat tires:
 Decelerate to the lowest appropriate speed as soon
as possible. Do not drive over 90 km/h (55 mph).
 Check and adjust the tire inflation pressure
immediately.
 If the tire pressure warning light comes on even after
tire inflation pressure adjustment, it is probable that
you have a flat tire. Have the tire replaced by the
nearest Lexus dealer.
 Avoid abrupt maneuvering and braking. If the vehicle
tires deteriorate, you could lose control of the
steering wheel or the brakes.
Vehicles with standard tires:
 Stop your vehicle in a safe place as soon as possible.
Adjust the tire inflation pressure immediately.
 If the tire pressure warning light comes on even after
tire inflation pressure adjustment, it is probable that
you have a flat tire. Check the tires. If the tire is flat,
change to the spare tire and have the flat tire repaired
by the nearest Lexus dealer.
 Avoid abrupt maneuvering and braking. If the vehicle
tires deteriorate, you could lose control of the
steering wheel or the brakes.

STARTING AND DRIVING
442The tire pressure warning light may turn on due to natural
causes such as natural air l
eaks or tire inflation pressure
changes caused by temperature. In this case, adjusting the
tire inflation pressure will turn off the light after a few minutes.
Pushing the tire pressure warning reset switch should not turn
off the tire pressure warning light. Adjusting the tire inflation
pressure will turn off the light.
The compact spare tire is not equipped with the tire pressure
warning valve and transmitter. If a tire goes flat, the warning
light will not turn off even though the flat tire is replaced with the
spare tire. Replace the spare tire with the repaired tire and
adjust the proper tire inflation pressure. The tire pressure
warning light will turn off after a few minutes.
CAUTION
Each tire, including the spare (if provided), should be
checked m onthly when cold and inflated to the inflation
pressure recommended by the vehicle manufacturer on
the vehicle placard or tire inflation pressure label (tire
and load information label). (If your vehicle has tires of
a different size than the size indicated on the vehicle
placard or tire inflation pressure label (tire and load
information label), you should determine the proper tire
inflation pressure for those tires.)
As an added safety feature, your vehicle has been
equipped with a tire pressure monitoring system
(TPMS–tire pressure warning system) that illuminates a
low tire pressure telltale (tire pressure warning light)
when one or more of your tires is significantly
underinflated. Accordingly, when the low tire pressure
telltale (tire pressure warning light) illuminates, you
should stop and check your tires as soon as possible,
and inflate them to the proper pressure. Driving on a
significantly underinflated tire causes the tire to
overheat and can lead to tire failure. Underinflation
also reduces fuel efficiency and tire tread life, and may
affect the vehicle’s handling and stopping ability.

STARTING AND DRIVING
443
Please note that the TPMS (tire pressure warning
system) is not a substitute for proper tire maintenance,
and it is the driver’s responsibility to maintain correct
tire pressure, even if underinflation has not reached
the level to trigger illumination of the TPMS low tire
pressure telltale (tire pressure warning light).NOTICE
 Do not use liquid sealants for a flat tire as tire
pressure warning valve and transmitter will be
damaged.
 When the tires must be repaired or replaced, have
them repaired or replaced by your Lexus dealer or an
authorized tire dealer. The tire pressure warning
valves and transmitters will be affected by the
installation or removal of tires.

STARTING AND DRIVING
444If the tire pressure warning light blinks...
G31048
If the tire pressure warning light blinks when the engine
switch “IGON” mode is selected, the tire pressure
warning system is not working properly.
The system will be disabled in the following conditions:
(When the condition becomes normal, the system will work
properly.)

If tires not equipped with tire pressure warning valves and
transmitters are used.
 If the ID code on the tire pressure warning valves and
transmitters is not registered.
 If electronic devices or facilities using similar radio wave
frequencies are nearby.
 If a radio set at similar frequencies is in use in the vehicle. 
If a window tint that affects the radio wave signals is
installed.
 If the tire pressure warning select switch is set to a dif ferent
tire setting.
 If there is a lot of snow or ice on the vehicle, in particular
around the wheels or wheel housings.
 If non− genuine Lexus wheels are used.
 If tire chains are used.
 If the tire inflation pressure is more than 500 kPa (5.1
kgf/cm
2 or bar, 73 psi).
If the tire pressure warning light blinks frequently when the
engine switch “IG −ON” mode is selected, have it checked by
your Lexus dealer.
Even if you use genuine wheels, the tire pressure warning
system may not work properly with some types of tires.
Pushing the tire pressure warning reset switch should not turn
off the tire pressure warning light.