tire pressure Lexus GX460 2021 / User Guide

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GX460_OM_OM60T19U_(U)4-5. Using the driving support systems
WARNING
■Replacing tires
Make sure that all tires are
of the specified size, brand, tread pattern and total load
capacity. In addition, make sure that the tire s are inflated to the recommended tire infla-
tion pressure level.
The ABS/Multi Terrain ABS, TRAC/Active TRAC, Trailer Sway Control and VSC sys-
tems will not function correctly if diff erent tires are installed on the vehicle.
Contact your Lexus dealer for further in formation when replacing tires or wheels.
■Handling of tires and the suspension
Using tires with any kind of problem or modi fying the suspension will affect the driving
assist systems, and may cause a system to malfunction.
■Trailer Sway Control precaution
The Trailer Sway Control system is not able to reduce trailer sway in all situations.
Depending on many factors such as the condit ions of the vehicle, trailer, road surface
and driving environment, the Trailer Sway Control system may not be effective. Refer to
your trailer owner’s manual for information on how to tow your trailer properly.
■If trailer sway occurs
Observe the following precautions.
Failing to do so may cause death or serious injury.
●Firmly grip the steering wh eel. Steer straight ahead.
Do not try to control trailer sway by turning the steering wheel.
●Begin releasing the accelerator pedal immediately but very gradually to reduce
speed.
Do not increase speed. Do not apply vehicle brakes.
If you make no extreme correction with the steering or brakes, your vehicle and trailer
should stabilize. ( P. 195)

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GX460_OM_OM60T19U_(U)4-6. Driving tips
■Tire chain installation
Observe the following precautions when installing and removing chains:
●Install and remove tire chains in a safe location.
●Install tire chains on the rear tires. Do
not install tire chains on the front tires.
●Install tire chains on rear tires as tightly as possible. Retighten chains after driving 1/4 -
1/2 mile (0.5 - 1.0 km).
●Install tire chains following the instructions provided with the tire chains.
WARNING
■Driving with snow tires
Observe the following precautions to reduce the risk of accidents.
Failure to do so may result in a loss of vehi cle control and cause death or serious injury.
●Use tires of the specified size.
●Maintain the recommended level of air pressure.
●Do not drive in excess of 75 mph (120 km/h ), regardless of the type of snow tires
being used.
●Use snow tires on all, not just some wheels.
●Do not use LDA (Lane Departure Alert) system.
■Driving with tire chains
Observe the following precautions to reduce the risk of accidents.
Failing to do so may result in the vehicle being unable to be driven safely, and may
cause death or serious injury.
●Do not drive in excess of the speed limit specified for the ti re chains being used, or 30
mph (50 km/h), whichever is lower.
●Avoid driving on bumpy road surfaces or over potholes.
●Avoid sudden acceleration, abrupt steering, sudden braking and shifting operations
that cause sudden engine braking.
●Slow down sufficiently before entering a cu rve to ensure that vehicle control is main-
tained.
●Do not use LDA (Lane Departure Alert) system.
NOTICE
■Repairing or replacing snow tires
Request repairs or replacement of snow ti res from Lexus dealers or legitimate tire
retailers.
This is because the removal an d attachment of snow tires affects the operation of the
tire pressure warning va lves and transmitters.
■Fitting tire chains
The tire pressure warning valv es and transmitters may not function correctly when tire
chains are fitted.

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GX460_OM_OM60T19U_(U)
6Maintenance and care
6-1. Maintenance and careCleaning and protecting the vehicle exterior ................ 442
Cleaning and protecting the vehicle interior.................. 445
6-2. Maintenance Maintenance requirements ............................448
General maintenance............... 451
Emission inspection and maintenance (I/M)
programs .................................... 454
6-3. Do-it-yourself maintenance Do-it-yourself service precautions................................455
Hood ...............................................458
Engine compartment ............... 459
Tires ................................................. 472
Tire inflation pressure...............484
Wheels .......................................... 488
Air conditioning filter ...............490
Electronic key battery .............. 492
Checking and replacing fuses .............................................. 494
Headlight aim .............................. 497
Light bulbs..................................... 499

GX460_OM_OM60T19U_(U)
4536-2. Maintenance
6
Maintenance and care
Vehicle exterior
ItemsCheck points
Doors• Do the doors operate smoothly?
Engine hood• Does the engine hood lock system work properly?
Fluid leaks• There should not be any signs of fluid leakage after
the vehicle has been parked.
Tires
• Is the tire inflation pressure correct?
• The tires should not be damaged or excessively worn.
• Have the tires been rotated according to the mainte- nance schedule?
• The wheel nuts should not be loose.
Windshield wipers/rear
window wiper
•The wiper blades should no t show any signs of crack-
ing, splitting, wear, contamination or deformation.
• The wiper blades should clear the windshield/rear
window without streaking or skipping.
WARNING
■If the engine is running
Turn off the engine and ensure that there is adequate ventilation before performing
maintenance checks.

456
GX460_OM_OM60T19U_(U)6-3. Do-it-yourself maintenance
Headlight aim
(
 P. 497)• Phillips-head screwdriver
Light bulbs
( P. 499)
• Bulb with same number and wattage rating as original
• Phillips-head screwdriver•Flathead sc rewdriver
•Wrench
Power steering fluid
level (P. 467)• Automatic transmission fluid DEXRON® II or III
• Rag or paper towel•Clean funnel
Radiator and con-
denser ( P. 465)
Tire inflation pres-
sure (P. 484)• Tire pressure gauge• Compressed air source
Washer fluid
( P. 471)• Water or washer fluid containing antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)
ItemsParts and tools

472
GX460_OM_OM60T19U_(U)6-3. Do-it-yourself maintenance
Tires
Check if the treadwear indicators are showing on the tires. Also check the tires
for uneven wear, such as excessive
wear on one side of the tread.
Check the spare tire condition and pressure if not rotated.
New tread
Worn tread
Treadwear indicator
The location of treadwear indicators is shown by a “TWI” or “ ” mark, etc., molded
into the sidewall of each tire.
Replace the tires if the treadwear indicators are showing on a tire.
Rotate the tires in the order shown.
To equalize tire wear and extend tire life,
Lexus recommends that tire rotation is
carried out at the same interval as tire
inspection.
Do not fail to initialize the tire pressure
warning system after tire rotation.
Replace or rotate tires in accordance with maintenance schedules and tread-
wear.
Checking tires
Tire rotation
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Front

GX460_OM_OM60T19U_(U)
4736-3. Do-it-yourself maintenance
6
Maintenance and care
Your vehicle is equipped with a tire pressure warning system that uses tire pres-
sure warning valves and transmitters to detect low tire inflation pressure before
serious problems arise.
●If the tire pressure drops below a predet ermined level, the driver is warned by
a screen display and a warning light. ( P. 520)
●The tire pressure detected by the
tire pressure warning system can be
displayed on the multi-information
display. ( P. 93)
The illustration used is intended as an
example, and may differ from the image
that is actually disp layed on the multi-
information display.
◆Installing tire pressure warning valves and transmitters
When replacing tires or wheels, tire pr essure warning valves and transmitters
must also be installed.
When new tire pressure wa rning valves and transmitters are installed, new ID
codes must be registered in the tire pressure warning computer and the tire
pressure warning system must be initialized. ( P. 475)
◆Initializing the tire pressure warning system
■The tire pressure warning system must be initialized in the following circum-
stances:
●When changing the tire size.
●When rotating the tires.
●When the tire inflation pressure is changed such as when changing travel-
ing speed or load weight.
●After registering the ID codes. ( P. 475)
When the tire pressure warning system is initialized, the current tire inflation
pressure is set as the benchmark pressure.
Tire pressure warning system

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GX460_OM_OM60T19U_(U)6-3. Do-it-yourself maintenance
■How to initialize the tire pressure warning system
Park the vehicle in a safe place and st op the engine for 20 minutes or more.
Initialization cannot be performed while the vehicle is moving.
Adjust the tire inflation pressure to th e specified cold tire inflation pressure
level. ( P. 568)
Make sure to adjust the tire pressure to the specified cold tire inflation pressure
level. The tire pressure warning system will operate based on this pressure level.
Start the engine. (P. 200)
Press or of the meter control switches and select .
Press or of the meter control switches and select “Vehicle
Settings”, and then press .
Press or of the meter control switches and select “TPWS”, and
then press .
Press or of the meter
control switches and select “Set
Pressure”, and then press and
hold until the tire pressure
warning light starts blinking.
A message is displayed on the multi-
information display. Also, “--” is dis-
played for inflation pressure of each
tire on the multi-information display
while the tire pressure warning sys-
tem determines the position.
Drive at approximately 25 mph (40 km /h) or more for approximately 10 to
30 minutes.
When initialization is comple te, the inflation pressure of each tire will be displayed
on the multi-information display.
Even if the vehicle is not driven at ap proximately 25 mph (40 km/h) or more, ini-
tialization can be co mpleted by driving for a long ti me. However, if initialization
does not complete after driving for 1 hour or more, park the vehicle in a safe place
for approximately 20 minutes and then drive the vehicle again.
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GX460_OM_OM60T19U_(U)
4756-3. Do-it-yourself maintenance
6
Maintenance and care
◆Registering ID codes
Every tire pressure warning valve and transmitter has a unique ID code.
When replacing a tire pressure warning valve and transmitter, it is necessary
to register the ID code.
When registering the ID codes, perform the following procedure.
Park the vehicle in a safe place, wait for approximately 20 minutes, and
then start the engine. ( P. 200)
Press or of the meter control switches and select .
Press or of the meter control switches and select “Vehicle
Settings”, and then press .
Press or of the meter control switches and select “TPWS”, and
then press .
Press or of the meter
control switches and select
“Change Wheel Set”, and then
press and hold until the tire
pressure warning light starts
slowly blinking 3 times.
Then a message will be displayed on
the multi-information display.
When registration is being performed, the tire pressure warning light will blink for
approximately 1 minute then illuminate and “--” will be displayed for the inflation
pressure of each tire on the multi-information display.
Drive at approximately 25 mph (40 km /h) or more for approximately 10 to
30 minutes.
Registration is complete when the tire pressure warning light turns off and the
inflation pressure of each tire is displayed on the multi-information display.
Even if the vehicle is not driven at approxim ately 25 mph (40 km/h) or more, reg-
istration can be completed by driving for a long time. However, if registration does
not complete after driving for 1 hour or more, perform the procedure again from
the beginning.
Initialize the tire pressure warning system. ( P. 474)
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476
GX460_OM_OM60T19U_(U)6-3. Do-it-yourself maintenance
■When to replace your vehicle’s tires
Tires should be replaced if:
●The treadwear indicators are showing on a tire.
●You have tire damage such as
cuts, splits, cracks deep enough to expose the fabric, and
bulges indicating internal damage
●A tire goes flat repeatedly or cannot be properly repaired due to the size or location of
a cut or other damage
If you are not sure, consult with your Lexus dealer.
■Replacing tires and wheels
If the ID code of the tire pressure warning valve and transmitter is not registered, the tire
pressure warning system will not work proper ly. After driving for about 20 minutes, the
tire pressure warning light blinks for 1 minu te and stays on to indicate a system malfunc-
tion.
■Tire life
Any tire over 6 years old must be checked by a qualified technician even if it has seldom
or never been used or damage is not obvious.
■Routine tire inflation pressure checks
The tire pressure warning syst em does not replace routine tire inflation pressure checks.
Make sure to check tire inflat ion pressure as part of your routine of daily vehicle checks.
■Maximum load of tire
Check that the number given by dividing the maximum load by 1.10 of the replacement
tire is greater than 1/2 of the Gross Axle We ight Ratings (GAWR) of either the front axle
or the rear axle, whichever is greater.
For the GAWR, see the Certification Label. For
the maximum load of the tire, see the load limit
at maximum cold tire inflation pressure men-
tioned on the sidewall of the tire. ( P. 573)