
486
LX570_OM_OM60Q78U_(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
on 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

490
LX570_OM_OM60Q78U_(U) 6-3. Do-it-yourself maintenance■
Tire types ●
Summer tires
Summer tires are high-speed performance ti res best suited to highway driving under
dry conditions. Since summer tires do not have the same traction performance as
snow tires, summer tires are inadequate for driving on snow-covered or icy roads. For
driving on snow-covered roads or icy road s, the use of snow tires is recommended.
When installing snow tires, be sure to replace all four tires.●
All season tires
All season tires are designed to provide better traction in snow and to be adequate for
driving in most winter conditions, as well as for use year round. All season tires, how-
ever, do not have adequate traction perfor mance compared with snow tires in heavy
or loose snow. Also, all season tires fall short in acceleration and handling perfor-
mance compared with summer tires in highway driving.●
Snow tires
For driving on snow-covered roads or icy roads, we recommend using snow tires. If
you need snow tires, select ti res of the same size, construction and load capacity as the
originally installed tires. Since your vehicle has radial tires as or iginal equipment, make
sure your snow tires also have radial cons truction. Do not install studded tires without
first checking local regulations for possible re striction. Snow tires should be installed
on all wheels. ( → P. 382)■
Initializing the tire pressure warning system
Initialize the tire pressure warn ing system with the tire inflat ion pressure adjusted to the
specified level. ■
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.■
If you press the tire pressure warning reset switch accidentally
If initialization is performed, adjust the tire inflation pressure to the specified level and ini-
tialize the tire pressure warning system again.■
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.

5257-2. Steps to take in an emergency
LX570_OM_OM60Q78U_(U) 7
When trouble arises ■
When the tire pressure warning light comes on
Inspect the tires to check if a tire is punctured.
If a tire is punctured: → P. 532
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 an d perform initialization.
( → P. 487)
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 warnin g system. Have the vehicle
inspected by your Lexus dealer immediately. ■
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 spare tire is also equipped with the tire pressure warning valve and transmitter. The
tire pressure warning light will tu rn on if the tire inflation pressu re of the spare tire is low. If
a tire goes flat, even though the flat tire is replaced with the spare tire, the tire pressure
warning light does not turn off. Replace the spare tire with the repaired tire and adjust the
proper tire inflation pressure. The tire pressu re warning light will tu rn off after a few min-
utes. ■
Conditions that the tire pressure wa rning system may not function properly
→ P. 490 ■
Changing the engine oil
Make sure to reset oil change system ■
Warning buzzer
In some cases, the buzzer ma y not be heard due to being in a noisy location or audio
sound. 1
2

532
LX570_OM_OM60Q78U_(U) 7-2. Steps to take in an emergency
If you have a flat tire ●
Stop the vehicle in a safe pl ace on a hard, flat surface.●
Set the parking brake. ●
Shift the shift lever to “P”. ●
Turn off the 4-Wheel AHC. ( → P. 295)●
Stop the engine. ●
Turn on the emergency flashers.Your vehicle is equipped with a spare tire. The flat tire can be replaced with
the spare tire.
For details about tires: → P. 486WARNING ■
If you have a flat tire
Do not continue driving with a flat tire.
Driving even a short distance with a flat ti re can damage the tire and the wheel beyond
repair, which could re sult in an accident.
Before jacking up the vehicle
Location of the spare tire, jack and tools
Jack
Spare tire Tool box1
2 3

624 Alphabetical index
LX570_OM_OM60Q78U_(U) Snow tires ................................................ 382
“SOS” button.......................................... 452
Spare tire
Inflation pressure ............................... 565
Storage location .................................532
Spark plug ............................................... 562
Specifications .........................................558
Speedometer ............................................ 88
SRS airbags................................................ 38
Steering
Column lock release ........................207
Fluid.......................................................... 564
Steering wheel ........................................ 158
Adjustment ............................................. 158
Audio switches
* Meter control switches ...................... 93
Power easy access system .............. 151
Telephone switches
*Stop/tail lights
Replacing light bulbs ....................... 508
Storage feature ..................................... 420
Stuck
If the vehicle becomes stuck ....... 555
Sun visors ...................................................431
Sunshade
Roof............................................................ 169
Rear door...............................................443 Switch
Audio remote control switches
* Automatic High Beam switch ..... 225
Center differential lock/unlock
switch ...................................................304
Climate concierge switch .............398
Cruise control switch ........... 269, 281
Door lock switch.................................... 117
Driving mode select switch .......... 284
Driving position memory
switches ................................................ 152
Emergency flashers switch ............ 510
Engine switch ......................................205
Fog light switch ................................... 229
Four-wheel drive control
switch ...................................................303
Garage door opener
switches .............................................. 445
Headlight cleaner switch ............... 238
Interior light switch..............................418
Intuitive parking assist...................... 287
Ignition switch......................................205
LDA (Lane Departure Alert)....... 263
Light switches ........................................ 221
Meter control switches ...................... 93
Moon roof switches .......................... 168
Outside rear view mirror
switches ................................................ 162
Paddle shift switches.......................... 212
Personal light switch ..........................419
Power back door switch.................. 124
Power door lock switch ..................... 117
Power window switch .......................165