2006 Lexus GS430 warning light

IN CASE OF AN EMERGENCY
469
NOTICE
Do not use liquid sealants for a flat tire as tire
pressure sensors will be damaged.
 Take due care not to go over a curb stone and
be careful of the holes in the road because
deflated tire pressure affects tire cushion
performance. The wheels, tires, body,
suspension and other components could be
damaged.
 Your ground clearance is reduced if the runflat
tire goes flat so avoid driving over obstacles
and drive slowly on rough, unpaved roads and
speed bumps. Also, do not attempt to go
through an automatic car wash as the vehicle
may get caught, resulting in damage.
 When the tires must be replaced, have them
replaced by the nearest Lexus dealer or
authorized tire dealer. The tire pressure
sensors will be affected by the installation or
removal of tires.
 When the tires must be replaced, replace the
grommets for tire pressure sensors as well.
IF YOU HAVE A FLAT TIRE
(Vehicles with standard tires)
CAUTION
If the low tire pressure warning light comes on,
observe the following instructions:
 Decelerate as soon as possible to the most
appropriate speed that conditions permit.
 Avoid abrupt steering wheel maneuvering and
braking. If the vehicle tires deteriorate, you
could lose control of the steering wheel or the
brakes, causing death or serious injury.
 The warning system may not activate
immediately if bursts or sudden air leakage
should occur.
1. Reduce your speed gradually, keeping a straight line.
Move cautiously off the road to a safe place − well away
from the traffic. Avoid stopping on the center divider of
a highway. Park on a level spot with firm ground.
2. Stop the engine and turn on your emergency flashers.
3. Firmly set the parking brake and put the transmission
in ”P”.
4. Have everyone get out of the vehicle on the side away
from traffic.

IN CASE OF AN EMERGENCY
471
Compact spare tire
G40025
The compact spare tire is designed for temporary
emergency use only.
The compact spare tire is identified by the distinctive
wording “TEMPORARY USE ONLY” molded into the
side wall of the tire.
To keep the compact spare tire noticeable, do not hide
the wheel by a wheel cover or such.
The compact spare tire saves space in your luggage
compartment, and its lighter weight helps to improve fuel
economy and permits easier installation in case of a flat
tire. The compact spare tire is not equipped with the tire
pressure sensor
. If tire inflation pressure becomes low,
the tire pressure warning system will not be activated.
Also, if you replace the compact spare tire after the low
tire pressure warning light comes on, the light remains
on.
The compact spare tire can be used many times, if
necessary. It has tread life of up to 4800 km (3000 miles)
depending on road conditions and your driving habits.
When tread wear indicators appear on the tire, replace
the tire. (See “Checking and replacing tires” on page
554.)

MAINTENANCE
494Battery
Your Lexus has a maintenance free battery. You do not have
to add distilled water. For longer life of the battery, however,
see page 571 for additional information.
Brake fluid level
Make sure the brake fluid level is correct. See page 538 for
additional information.
Engine oil level
Check the level on the dipstick with the engine turned off and
the vehicle parked on a level spot.
See page 522 for additional
information.
Exhaust system
If you notice any change in the sound of the exhaust or smell
exhaust fumes, have the cause located and corrected
immediately. (See “Engine exhaust caution” on page 341.)
Vehicle interior
Items listed below should be checked regularly, e.g. while
performing periodic services, cleaning the vehicle, etc.
Lights
Make sure the headlight, stop lights, tail lights, turn signal
lights, and other lights are working. Check headlight aim.
Service reminder indicators and warning buzzers
Check that all service reminder indicators and warning
buzzers function properly.
Steering wheel
Check that it ha s the specified free play. Be alert for changes
in steering condition, such as hard steering, excessive free
play or strange noise.
Seats
Check that all front seat controls such as seat adjusters,
seatback recliner, etc. operate smoothly. Check that the head
restraints move up and down smoothly and that the locks hold
securely in any latched position.
Seat belts
Check that the seat belt system such as buckles, retractors
and anchors operate properly and smoothly. Make sure the
belt webbing is not cut, frayed, worn or damaged.

CHASSIS
538
CHECKING BRAKE FLUID
G62010
GS430
G62011
GS300
To check the fluid level, simply look at the seethrough
reservoir. The level should be between the ”MAX” and
”MIN” lines on the tank. It is normal for the brake fluid level to go down slightly as the
brake pads wear or when the fluid level in the accumulator is
high.
If the level is low, take your vehicle to a Lexus dealer as
soon as possible. Do not drive your vehicle if the brake
system warning light (red) is on. Call a Lexus dealer for
assistance.
If the fluid level goes down soon after your vehicle is
serviced, it may indicate a serious mechanical problem.
Have your vehicle checked by your Lexus dealer.
CAUTION
Brake
fluid can harm your hands or eyes. If fluid gets on
your hands or in your eyes, flush the affected area with
clean water immediately. If you still feel uncomfortable
with your hands or eyes, go to the doctor.

CHASSIS
552
RUNFLAT TIRES
This vehicle can be equipped with either runflat
tires (RFT) or standard tires. You may continue
driving on the vehicle with runflat tires even if any
tire goes flat. It may be able to run for a maximum
of 160 km (100 miles) at a speed below 90 km/h (55
mph) after the low tire pressure warning light comes
on. When you drive your vehicle after the low tire
pressure warning light comes on, the tire must be
replaced. Do not use the repaired tire.
G63004
A “RFT” or “DSST” mark is molded on the sidewall of the
run−flat tire.
If you cannot distinguish between the standard tire and
run−flat tire, consult Lexus dealer.
If you have a flat tire, you have to take a different action
depending on whether the tires are standard tires or
run−flat tires.
Runflat tires characteristics:
The vehicle with run −flat tires helps you to continue
driving for up to 160 km (100 miles) at the moderate
speed and do not ever exceed 90 km/h (55 mph) even
with a flat tire. After such usage, the tire must be
replaced. If you are not sure, consult your Lexus dealer.
If you have a flat tire, decrease the speed and drive at
lower speed to reduce the extent to which the tire is
damaged.
However, in some conditions (such as at high
temperatures), you could not continue driving for up to
160 km (100 miles).
The use of non−genuine wheels may prohibit optimum
performance.
The run −flat tires equipped on this vehicle are ones
dedicated for GS430/300. Do not use them on another
model.
Do not mix run− flat tires with standard tires.
The tire warranty book covers the detailed information
on run− flat tires. For details, see the tire warranty book.
Tire pressure warning system
The tire pressure warning system is equipped to warn
you of the low tire inflation pressure. For details, see
“Tire pressure warning system” on page 433.

ELECTRICAL COMPONENTS
566
No.FUSEAMPERECIRCUIT
1 STR LOCK25Steering lock system
2 SECURITY7.5Smart access system with
push−button start
3 TI &TE20Power tilt and telescopic
steering wheel, Multiplex
communication system
4 AM17.5Starting system
5 STOP SW7.5
Stop/tail lights, Multi− port fuel
injection system/sequential
multiport fuel injection system,
Starting system, Electronic
control brake system, Vehicle
stability control system, Shift
lock system
6 OBD7.5On− board diagnosis system
7 FR P/SEAT
RH30Power seat system
8 AIR SUS20Electronic modulated
suspension
9 PWR
OUTLET15Power outlet
10 CIG15Cigarette lighter
11 ACC7.5
Multiplex communication
system, Smart access system
with push− button start, Rear
view monitor system, Audio
system, Air conditioning system
No.FUSEAMPERECIRCUIT
12 IGN10
Multi− port fuel injection
system/sequential multiport fuel
injection system, SRS airbag
system, Stop/tail lights,
Steering lock system, Electronic
control brake system
13 GAUGE7.5Gauges and meters
14 ECUIG
RH10
Power tilt and telescopic
steering wheel, Multiplex
communication system, Smart
access system with
push −button start, Audio
system, Air conditioning
system, Shift lock system, Tire
pressure warning system,
Combination switch
15 FR S/HTR
RH15Seat heater, Heated and
ventilated seats
16 RHIG7.5
Seat heater switches, Front
right door control system, Rear
right door control system,
Capacitor, Combination switch,
Seat belt pretensioners,
Intuitive parking assist
17 AM215Starting system