Page 468 of 632
468
GX460_OM_OM60M73U_(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
Wo r n t r e a d
Treadwear indicator
The location of treadwear indicators is shown by the “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.
Replace or rotate tires in accordance with maintenance schedules and tread-
wear.
Checking tires
Tire rotation
1
2
3
Front
Page 472 of 632

472
GX460_OM_OM60M73U_(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.
• 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.
Page 516 of 632

5167-2. Steps to take in an emergency
GX460_OM_OM60M73U_(U)
■If the low speed four-wheel drive indicator light or the center differential lock indicator
light blinks
Take the specified steps. (P. 3 3 8 )
■When the tire pressure warning light comes on
Check the tire inflation pressure and adjust to the appropriate level.
■The tire pressure warning light may 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 will turn on if the tire inflation pressure of the spare tire is
low. If a tire goes flat, the tire pressure warning light will not turn off even though the flat
tire has been replaced with the spare tire.
■Conditions that the tire pressure warning system may not function properly
P. 4 7 2
■If the tire pressure warning light frequently 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. 5 8 6 )
Page 535 of 632
5357-2. Steps to take in an emergency
GX460_OM_OM60M73U_(U)
7
When trouble arises
Jack
To o l b o x
Spare tire
Location of the spare tire, jack and tools
1
2
3
Page 626 of 632

626Alphabetical index
GX460_OM_OM60M73U_(U)
Seat heaters ............................................ 394
Seat ventilators ...................................... 395
Seat position memory............................ 131
Seats....................................................118, 120Adjustment .................................... 118, 120
Adjustment precautions ......... 119, 130
Child seats/child restraint system installation.............................. 57
Cleaning .................................................. 441
Driving position memory .................. 131
Head restraint ....................................... 136
Properly sitting in the seat ................ 26
Seat position memory......................... 131
Ventilators ............................................ 395
Sensor Automatic headlight system .......... 198
Inside rear view mirror ......................142
Intuitive parking assist-sensor .................................... 238
Rain-sensing windshield wipers .................................................. 209
Service reminder indicators ................74
Shift lever Automatic transmission ................... 190
If the shift lever cannot be shifted from P .................................. 549
Shift lock system.................................... 549
Shopping bag hooks ........................... 407
Side airbags ............................................... 34
Side mirrors ..............................................143 Adjusting and folding........................ 143
Blind Spot Monitor............................. 351
Side turn signal lights ............................194 Replacing light bulbs ....................... 499
Turn signal lever .................................. 194 Smart access system with
push-button start.................................... 111Antenna location..................................... 111
Starting the engine ............................. 185
Snow tires .................................................373
Spare tire ................................................. 534 Inflation pressure................................ 570
Storage location .................................535
Spark plug ............................................... 566
Specifications......................................... 562
Speedometer ............................................. 79
Steering lock Column lock release ........................ 188
Steering wheel ........................................ 139 Adjustment..............................................139
Audio switches
*
Heated steering wheel ................... 393
Steering wheel position memory...................................................131
Stop/tail lights Replacing light bulbs ....................... 499
Storage feature ..................................... 399
Stuck If the vehicle becomes stuck........559
Sun shade Roof ........................................................... 150
Sun visors................................................... 415
Switch “2nd START” button ........................... 191
AVS switch ........................................... 335
BSM (Blind Spot Monitor) switch .....................................................351
Center differential lock/ unlock switch.................................... 337
Crawl Control switch......................340
Cruise control switch ..............218, 221
“DAC” switch ...................................... 343