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
1
2
3
Front
478
GX460_OM_OM60T19U_(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 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 that generates st rong radio waves or electrical noise
• When carrying a portable radio, cellular phone, cordless phone or other wireless
communication device
If tire position information is not correctl y displayed due to the radio wave conditions,
the display may be corrected by driving and changing the radio wave conditions.
●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.
5237-2. Steps to take in an emergency
GX460_OM_OM60T19U_(U)
7
When trouble arises
■If the low speed four-wheel driv e indicator light or the center differential lock indicator
light blinks
Take the specified steps. ( P. 346)
■When the tire pressure warning light comes on
Inspect the tires to check if a tire is punctured.
If a tire is punctured: P. 531
If none of the tires are punctured:
Turn the engine switch off then turn it to IGNITION ON mode. Check if the tire pressure
warning light comes on or flashes.
If the tire pressure warning light comes on
After the temperature of the tires has lowere d sufficiently, check the inflation pressure
of each tire and adjust th em to the specified level.
If the warning light does not turn off even after several minutes have elapsed, check
that the inflation pressure of each tire is at the specified level and perform initialization.
( P. 474)
If the warning light does not turn off even after several minutes have elapsed, have the
vehicle inspected by your Lexus dealer immediately.
If the tire pressure wa rning light flashes for 1 minute then stay on
There may be a malfunction in the tire pressure warning system. Have the vehicle
inspected by your Lexus dealer immediately.
■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 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. 478
■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. 584)
1
2
5327-2. Steps to take in an emergency
GX460_OM_OM60T19U_(U)
Jack
Tool box
Spare tire
Location of the spare tire, jack and tools
1
2
3
622Alphabetical index
GX460_OM_OM60T19U_(U)
Seat heaters ............................................ 398
Seat ventilators ...................................... 399
Seat position memory...........................145
Seats...................................................132, 134Adjustment ................................... 132, 134
Adjustment precautions ........ 133, 144
Child seats/child restraint system installation............................. 58
Cleaning .................................................445
Driving position memory ................ 145
Head restraint ....................................... 150
Properly sitting in the seat ................ 28
Seat position memory....................... 145
Ventilators ............................................ 399
Sensor Automatic headlight system ...........214
Automatic High Beam system ..... 216
Inside rear view mirror ..................... 156
Intuitive parking assist-sensor .....270
LDA (Lane Departure Alert) ...... 250
Radar sensor ........................................ 234
Rain-sensing windshield wipers ................................................... 224
Service reminder indicators ............... 84
Shift lever Automatic transmission ................. 206
If the shift lever cannot be shifted from P .................................. 209
Shift lock system....................................208
Side airbags ............................................... 36
Side mirrors .............................................. 157 Adjusting and folding........................ 157
Blind Spot Monitor............................. 361 Side turn signal lights ..............................211
Replacing light bulbs ...................... 505
Turn signal lever .....................................211
Smart access system with push-button start................................. 125 Antenna location.................................. 125
Starting the engine ............................200
Snow tires .................................................376
Spare tire ................................................... 531 Inflation pressure............................... 568
Storage location ................................. 532
Spark plug ............................................... 564
Specifications......................................... 560
Speedometer ............................................ 90
Steering lock Column lock release ....................... 203
Steering wheel ........................................ 153 Adjustment..............................................153
Audio switches
*
Heated steering wheel ................... 397
Steering wheel position memory.................................................145
Stop/tail lights Replacing light bulbs ...................... 505
Storage feature ..................................... 403
Stuck If the vehicle becomes stuck........556
Sunshade Roof ............................................................164
Sun visors................................................... 419
Switch Automatic High Beam switch ....... 216
AVS switch ........................................... 343
BSM (Blind Spot Monitor) switch ................................................... 362
Center differential lock/ unlock switch.................................... 345