2004 Lexus GX470 wheel

STARTING AND DRIVING
416ABSº warning light
The light comes on when the ignition key is turned to the ONº
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 ABSº warning light is on (and the brake system
warning light is off), the anti-lock brake system, the brake
assist system, the active traction control system and the
vehicle stability control system do/does not operate, but the
brake system still operates conventionally.
When the ABSº 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.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 ONº 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 ABSº 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.
Either of the following conditions may occur, but do not
indicate a malfunction:
The light may stay on for about 60 seconds after the ignition
key is turned to the ONº position. 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.

STARTING AND DRIVING
418If the low tire pressure warning light comes on or blinks,
do the following.
If the warning light comes on:
Stop your vehicle in a safe place as soon as possible and
check that the inflation pressure of all tires (including the
spare tire) is as specified on the tire and loading
information label. (See Checking tire inflation pressureº
on page 557.) If the warning light comes on even after tire
inflation pressure adjustment, you may have a flat tire. If
you have a flat tire, replace it with the spare tire. For
details, see If you have a flat tireº on page 468.
The warning light goes off a few minutes after air is put into the
deflated tire.
This warning light may turn on due to natural causes such as
natural air leaks or tire pressure changes caused by
temperature. In this case, adjusting the tire pressure will turn
off the warning light.
CAUTION
When the low tire pressure warning light comes on,
observe the following instructions:
Depending on the conditions, reduce to an
appropriate speed as soon as possible.
Adjust the tire pressure to the specified level as soon
as possible.
Avoid abrupt steering wheel maneuvering and
braking. Tire deterioration may reduce steering
wheel control and brake effectiveness. This may lead
to serious injury or death.
The tire pressure warning system may not activate
immediately if sudden bursts of air leakage occur.

STARTING AND DRIVING
419
NOTICE
Do not use liquid sealants for a flat tire as air pressure
sensors will be damaged.
When the tires must be repaired or replaced, have
them repaired or replaced by the nearest Lexus
dealer or authorized tire dealer. The tire pressure
sensors will be affected by the installation or removal
of tires.
The tire pressure warning system is not to be used as
a substitute for regular inspections. Be sure to check
the air pressure in the tires on a regular basis.
When the tires must be replaced, replace the
grommets for air pressure sensors as well.
If the warning light blinks:
The tire pressure warning system may be malfunctioning.
Contact your Lexus dealer.System malfunction
The tire pressure warning system does not function
properly under certain circumstances. In the following
cases, the low tire pressure warning light may not come
on even if the tire inflation pressure is low, or it may come
on when the tire inflation pressure is actually normal.
Electric devices or facilities using similar radio wave
frequencies are nearby.
A radio set to similar frequencies is in use.
A lot of snow or ice covers the vehicle, in particular, around
the wheels or wheel housings.
The tires are not equipped with an air pressure sensor.
Tire chains are used.

STARTING AND DRIVING
420Non-genuine Lexus wheels are used.
Although the tires are equipped with air pressure sensors,
the selector switch (see page 425) is set to other tire setting.
CAUTION
The use of non-genuine wheels will cause the air
pressure sensors to transmit the electronic code in
different manner, resulting in the system failure.
The use of different type of tires with genuine wheels
may also cause the malfunction of the system.
CAUTION
When the tire pressure monitoring system warning light
is lit, one or more of your tires is significantly
under-inflated. You should stop and check your tires as
soon as possible, and inflate them to the proper
pressure as indicated on the vehicle's tire information
placard. Driving on a significantly under-inflated tire
causes the tire to overheat and can lead to tire failure.
Under-inflation also reduces fuel efficiency and tire
tread life, and may affect the vehicle's handling and
stopping ability. Each tire, including the spare, should
be checked monthly when cold and set to the
recommended inflation pressure as specified in the
vehicle placard and owner's manual.

STARTING AND DRIVING
424
Replacing tires and wheels
When replacing the wheels, be sure to install air pressure
sensors on the wheels.
There are 3 ways to set up the air pressure sensors:
(a) Remove the sensor from the old wheel and install it to the
new wheel.
(b) Keep the same wheel with air pressure sensor and replace
only the tire.
(c) Use a new wheel and sensor.
You have to register an ID code for a new sensor. Up to 2 sets
of codes can be registered. As one ID for the originally installed
sensor is registered at MAINº of the selector switch, use the
2ndº position to register an ID for the new sensor.
You do not need to re-register the ID code for any other
replacements. For the use of the originally installed tires, put
the selector switch at MAINº and for the use of tires set
purchased later, put the switch at 2ndº. For the sensor
selector switch, see page 425.CAUTION
Have the tires, wheels or sensors replaced and ID
codes registered by a Lexus dealer. If you need
sensors, purchase from a Lexus dealer.
The use of non-genuine wheels will cause the air
pressure sensors to transmit the electronic code in
different manner, resulting in the failure of the
system.

STARTING AND DRIVING
425
Selector switch

1Main position22nd position
The selector switch is located in the lower part of the
driver's side instrument panel.
The ID code is given in the sensor. To activate the air
pressure warning system, it is necessary to register the ID
code of the sensor on the selector switch in the vehicle.
2 sets of ID codes can be registered. The code of the tires
originally installed on the vehicle is registered on the switch at
MAINº. Have a new tires set with new air pressure sensors
registered at 2ndº by Lexus dealer.
ID codes should be registered by Lexus dealer. Once
registered, change the setting position each time you purchase
tires and wheels. Re-registration is not required.
When purchasing new tires, consult your Lexus dealer.
CAUTION
When the tires whose ID code is registered at MAINº
are used, the system does not work properly with the
selector switch set at 2ndº. If the tires whose ID code
is registered at 2ndº are stored nearby, the system will
detect their tire pressure (and vice versa).

STARTING AND DRIVING
427
LIMITED-SLIP DIFFERENTIAL
Your Lexus is equipped with a limited-slip center differential
(transfer).
If one wheel Ð either front or rear Ð begins to spin, the transfer
(limited-slip center differential) is designed to aid traction by
automatically transmitting driving force to the wheels on the
other drive axle. It transmits driving force to the front wheels
if a rear wheel spins, and to the rear wheels if a front wheel
spins.
CAUTION
Do not start or run the engine while your vehicle is
supported by a jack. The vehicle could be driven off the
jack and could pose a danger or result in serious injury.
NOTICE
Use only a spare tire of the same size, construction and
load capacity as the original tires on your Lexus
because damage to the limited-slip differential could
possibly occur with another tire type.

DRIVING TIPS
432
OPERATION IN FOREIGN
COUNTRIES
If you plan to drive your Lexus in another country...
First, comply with the vehicle registration laws.
Second, confirm the availability of the correct fuel (unleaded
and minimum octane rating).
TIPS FOR DRIVING IN VARIOUS
CONDITIONS
Always slow down in gusty crosswinds. This will allow you
much better control.
Drive slowly onto curbs and, if possible, at a right angle.
Avoid driving onto high, sharp-edged objects and other
road hazards. Failure to do so can lead to severe tire
damage such as a tire burst.
Drive slowly when passing over bumps or travelling on a
bumpy road. Otherwise, the impact could cause severe
damage to the tires and/or wheels.
When parking on a hill, turn the front wheels until they touch
the curb so that the vehicle will not roll. Apply the parking
brake, and place the transmission in Pº. If necessary, block
the wheels.
Washing your vehicle or driving through deep water may get
the brakes wet. To see whether they are wet, check that
there is no traffic near you and then press the pedal lightly.
If you do not feel a normal braking force, the brakes are
probably wet. To dry them, drive the vehicle cautiously while
lightly pressing the brake pedal with the parking brake
applied. If they still do not work safely, pull to the side of the
road and call a Lexus dealer for assistance.