Page 476 of 640
476
GX460_OM_OM60Q09U_(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 if 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 the “TWI” or “ Δ” 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.
Replace or rotate tires in accordance with maintenance schedules and tread-
wear.
Checking tires
Tire rotation
1
2
3
Front
Page 480 of 640

480
GX460_OM_OM60Q09U_(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 tire
s 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.
• An auxiliary-supported run-flat tire is equipped.
• If a window tint that affects th e radio wave signals is installed.
• If there is a lot of snow or ice on the vehi cle, particularly around the wheels or wheel
housings.
• If the tire inflation pressure is extr emely higher than the specified level.
• If the spare tire is in a location subj ect to poor radio wave signal reception.
• If a large metallic object which can interfer e 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 that generates st rong 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.
Page 524 of 640

5247-2. Steps to take in an emergency
GX460_OM_OM60Q09U_(U)
■If the low speed four-wheel drive indicator light or the center differential lock indicator
light blinks
Take the specified steps. ( →P. 344)
■When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level.
■The tire pressure warning light ma y turn on due to natural causes
The tire pressure warning light may turn on du e to natural causes such as natural air leaks
or tire inflation pressure changes caused by temperature. In this case, adjusting the tire
inflation pressure will turn off the warning light (after a few minutes).
■When a tire is replaced with a spare tire
The tire pressure warning light wi ll turn on if the tire inflation pressure of the spare tire is
low. If a tire goes flat, the tire pressure warn ing light will not turn off even though the flat
tire has been replaced with the spare tire.
■Conditions that the tire pressure wa rning system may not function properly
→ P. 480
■If the tire pressure warning light freque ntly comes on after blinking for 1 minute
If the tire pressure warning light frequently comes on after blinking for 1 minute when the
engine switch is turned to IGNITION ON mo de, have it checked by your Lexus dealer.
■Warning buzzer
In some cases, the buzzer may not be heard due to being in a noisy location or audio
sound.
■Customization
The vehicle speed linked seat belt reminder buzzer can be disabled.
(Customizable features: →P. 594)
Page 543 of 640
5437-2. Steps to take in an emergency
GX460_OM_OM60Q09U_(U)
7
When trouble arises
Jack
Tool box
Spare tire
Location of the spare tire, jack and tools
1
2
3
Page 634 of 640

634Alphabetical index
GX460_OM_OM60Q09U_(U)
Seat heaters ............................................400
Seat ventilators ....................................... 401
Seat position memory.......................... 135
Seats................................................... 122, 124Adjustment ....................................122, 124
Adjustment precautions ........ 123, 134
Child seats/child restraint system installation..............................59
Cleaning .................................................449
Driving position memory ................ 135
Head restraint ....................................... 140
Properly sitting in the seat ................ 28
Seat position memory....................... 135
Ventilators .............................................. 401
Sensor Automatic headlight system .........204
Inside rear view mirror ..................... 146
Intuitive parking assist-sensor .....................................245
Rain-sensing windshield wipers .................................................... 216
Service reminder indicators ............... 78
Shift lever Automatic transmission ................... 194
If the shift lever cannot be shifted from P .................................... 198
Shift lock system...................................... 197
Shopping bag hooks .............................413
Side airbags ............................................... 36
Side mirrors .............................................. 147 Adjusting and folding.........................147
Blind Spot Monitor............................357
Side turn signal lights ..........................200 Replacing light bulbs ....................... 506
Turn signal lever ................................ 200 Smart access system with
push-button start.................................. 115 Antenna location................................... 115
Starting the engine ............................. 189
Snow tires .................................................379
Spare tire ..................................................542 Inflation pressure................................ 578
Storage location ................................. 543
Spark plug ................................................574
Specifications......................................... 570
Speedometer ............................................ 83
Steering lock Column lock release ......................... 192
Steering wheel ........................................ 143 Adjustment.............................................. 143
Audio switches
*
Heated steering wheel ................... 399
Steering wheel position memory.................................................135
Stop/tail lights Replacing light bulbs ...................... 506
Storage feature ..................................... 405
Stuck If the vehicle becomes stuck........ 567
Sun shade Roof ............................................................154
Sun visors................................................... 421
Switch “2nd START” button ..........................195
AVS switch ............................................. 341
BSM (Blind Spot Monitor) switch ................................................... 357
Center differential lock/ unlock switch.................................... 343
Crawl Control switch...................... 346