tire pressure Lexus GX460 2014 Using the air conditioning system and defogger / LEXUS 2014 GX460 (OM60K80U) User Guide

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GX460_OM_OM60K80U_(U)
6Maintenance and care
6-1. Maintenance and careCleaning and protecting the vehicle exterior................. 434
Cleaning and protecting the vehicle interior .................. 437
6-2. Maintenance Maintenance requirements............................. 440
General mainte nance .............. 443
Emission inspection and maintenance (I/M)
programs .................................... 446
6-3. Do-it-yourself maintenance Do-it-yourself service precautions ................................ 447
Hood ............................................... 450
Engine compartment .................451
Tires .................................................. 464
Tire inflation pressure ................. 471
Wheels ........................................... 475
Air conditioning filter ................477
Electronic key battery .............. 479
Checking and replacing fuses ............................................... 481
Headlight aim ..............................484
Light bulbs.....................................486

GX460_OM_OM60K80U_(U)
4456-2. 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 afterthe vehicle has been parked.
Ti r e s
• Is the tire inflation pressure correct?
• The tires should not be damaged or excessivelyworn.
• 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.
CAUTION
■If the engine is running
Turn off the engine and ensure that there is adequate ventilation before performing
maintenance checks.

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GX460_OM_OM60K80U_(U)6-3. Do-it-yourself maintenance
Headlight aim
(
 P. 4 8 4 )• Phillips-head screwdriver
Light bulbs
( P. 4 8 6 )
• Bulb with same number and wattage rating as original
• Phillips-head screwdriver•Flathead screwdriver
•Wrench
Power steering fluid
level ( P. 4 5 9 )• Automatic transmission fluid DEXRON® II or III
•Rag or paper towel•Clean funnel
Radiator and con-
denser ( P. 4 5 7 )
Tire inflation pres-
sure (P. 4 7 1 )•Tire pressure gauge• Compressed air source
Wa s h e r f l u i d
( P. 4 6 3 )• Water or washer fluid containi ng antifreeze (for winter use)
• Funnel (used only for adding water or washer fluid)
ItemsPa r t s a n d t o o l s

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GX460_OM_OM60K80U_(U)6-3. Do-it-yourself maintenance
Tires
New tread
Treadwear indicator
Wo r n t r e a d
The location of treadwear indicators is
shown by the “TWI” or “ ” marks, etc.,
molded on the sidewall of each tire.
Check spare tire condition and pressure
if not rotated.
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.
Replace or rotate tires in accordance
with maintenance schedules and tread-
wear.
Checking tires
1
2
3
Tire rotation
Front

GX460_OM_OM60K80U_(U)
4656-3. Do-it-yourself maintenance
6
Maintenance and care
Your Lexus 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 predetermined level, the driver is warned by a
warning light. (P. 5 0 9 )
◆Installing tire pressure warning valves and transmitters
When replacing tires or wheels, tire pressure warning valves and transmitters
must also be installed.
When new tire pressure warning 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. Have tire pressure warning valve
and transmitter ID codes registered by your Lexus dealer. ( P. 4 6 5 )
◆Registering ID codes
The tire pressure warning valve and transmitter is equipped with a unique ID
code. When replacing a tire pressure warning valve and transmitter, it is nec-
essary to register the ID code. Have the ID code registered by your Lexus
dealer.
Tire pressure warning system

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GX460_OM_OM60K80U_(U)6-3. Do-it-yourself maintenance
■When to replace your vehicle’s tires
Tires should be replaced if:
●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 prop
erly 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 minute 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 system does not replace routine tire inflation pressure checks.
Make sure to check tire inflation 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 Weight 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. 5 6 7 )

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GX460_OM_OM60K80U_(U)6-3. Do-it-yourself maintenance
■If the tread on snow tires wears down below 0.16 in. (4 mm)
The effectiveness of the tires as snow tires is lost.
■Situations in which the tire pressure warning system may not operate properly
●In the following cases, the tire pressure warning system may not operate properly.
• If non-genuine Lexus wheels are used.
• A tire has been replaced with a tire that is not an OE (Original Equipment) tire.
• A tire has been replaced with a tire that is not of the specified size.
• Tire chains etc. are equipped.
• Lock nuts are equipped.
• An auxiliary-supported run-flat tire is equipped.
• If a window tint that affects the radio wave signals is installed.
• If there is a lot of snow or ice on the vehicle, particularly around the wheels or wheel
housings.
• If the tire inflation pressure is extremely higher than the specified level.
• If the spare tire is in a location subject to poor radio wave signal reception.
• If a large metallic object wh ich can interfere with signal reception is put near the
spare tire.
• If tires not equipped with the tire pressure warning valves and transmitters are used.
• If the ID code on the tire pressure warning valves and transmitters is not registered
in the tire pressure warning computer.
●Performance may be affected in the following situations.
• Near a TV tower, electric power plant, gas station, radio station, large display, air-
port or other facility th at generates strong radio waves or electrical noise
• When carrying a portable radio, cellular phone, cordless phone or other wireless
communication device
●When the vehicle is parked, the time taken for the warning to start or go off could be
extended.
●When tire inflation pressure declines rapidly for example when a tire has burst, the
warning may not function.

GX460_OM_OM60K80U_(U)
4696-3. Do-it-yourself maintenance
6
Maintenance and care
■Certification for tire pressure warning system
For vehicles sold in the U.S.A., Ha waii, Guam, Saipan and Puerto Rico
FCC ID: PAXPMV107J
FCC ID: HYQ13BCX
NOTE:
This device complies with part 15 of the FC C Rules. Operation is subject to the follow-
ing two conditions: (1) This device may no t cause harmful interference, and (2) this
device must accept any interference receiv ed, including interference that may cause
undesired operation.
FCC WARNING:
Changes or modifications not expressly appr oved by the party responsible for compli-
ance could void the user’s authority to operate the equipment.
For vehicles sold in Canada
NOTE:
Operation is subject to the following two conditions: (1) this device may not cause
interference, and (2) this device must acce pt any interference, including interference
that may cause undesired operation of the device.
CAUTION
■Tire pressure warning system operation
The tire pressure warning system may not provide warning immediately if a tire bursts
or if sudden air leakage occurs.
■When inspecting or replacing tires
Observe the following precautions to prevent accidents. Failure to do so may cause
damage to parts of the drive train as well as dangerous handling characteristics, which
may lead to an accident result ing in death or serious injury.
●Do not mix tires of different makes, models or tread patterns.
Also, do not mix tires of remarkably different treadwear.
●Do not use tire sizes other than those recommended by Lexus.
●Do not mix differently constructed tires (radial, bias-belted or bias-ply tires).
●Do not mix summer, all season and snow tires.
●Do not use tires that have been used on another vehicle.
Do not use tires if you do not know how they were used previously.

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GX460_OM_OM60K80U_(U)6-3. Do-it-yourself maintenance
NOTICE
■Repairing or replacing tires, wheels, tire
pressure warning valves, transmitters and
tire valve caps
●When removing or fitting the wheels, tires or the tire pressure warning valves and
transmitters, contact your Lexus dealer as the tire pressure warning valves and trans-
mitters may be damaged if not handled correctly.
●Make sure to install the tire valve caps. If the tire valve caps are not installed, water
could enter the tire pressure warning valves and the tire pressure warning valves
could be bound.
●When replacing tire valve caps, do not use tire valve caps other than those specified.
The cap may become stuck.
■To avoid damage to the tire pressu re warning valves and transmitters
When a tire is repaired with liquid sealants, the tire pressure warning valve and trans-
mitter may not operate properly. If a liquid se alant is used, contact your Lexus dealer or
other qualified service shop as soon as possible. Make sure to replace the tire pressure
warning valve and transmitter when replacing the tire. ( P. 4 6 5 )
■Driving on rough roads
Take particular care when driving on roads with loose surfaces or potholes.
These conditions may cause losses in tire inflation pressure, reducing the cushioning
ability of the tires. In addition, driving on rough roads may cause damage to the tires
themselves, as well as the vehicle’s wheels and body.
■If tire inflation pressure of ea ch tire becomes low while driving
Do not continue driving, or your tires and/or wheels may be ruined.

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GX460_OM_OM60K80U_(U)6-3. Do-it-yourself maintenance
6
Maintenance and care
Tire inflation pressure
The recommended cold tire inflation
pressure and tire size are displayed on
the tire and loading information label.
(
P. 5 6 2 )
Tire inflation pressure