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LX570_OM_OM60R07U_(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. 388)■
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.
629Alphabetical index
LX570_OM_OM60R07U_(U) Rear window wiper and
washer switch.....................................241
Rear window and outside
rear view mirror defoggers
switch....................................................... 411
Seat heater switches...........................421
Seat ventilator switches ....................421
“SOS” button........................................... 74
Talk switch
* Telephone switches
*Tilt and telescopic steering
control switch .................................... 164
Tire pressure warning reset
switch................................................... 490
Vehicle-to-vehicle distance
button .................................................... 281
VSC OFF switch .............................. 384
Window lock switch............................ 171
Windshield wipers and
washer switch................................... 237
Wireless charger power
supply switch ..................................... 441
Tachometer ............................................... 92
Tail lights....................................................227
Light switch ........................................... 227
Replacing light bulbs ......................... 510
Talk switch
* Telephone switch
*Theft deterrent system
Alarm........................................................... 82
Immobilizer system ............................. 80 Tire inflation pressure......................... 569
Maintenance data..............................569
Warning light ....................................... 525
Tire information .....................................573
Glossary................................................. 579
Size ........................................................... 575
Tire identification number ............. 574
Uniform Tire Quality Grading.... 577
Tire pressure warning system ......... 489
Function ..................................................489
Initializing ...............................................489
Installing tire pressure warning
valves and transmitters................489
Registering ID codes .......................490
Tire pressure warning reset
switch ...................................................490
Warning light ....................................... 525
Tires ........................................................... 488
Chains .....................................................389
Checking .............................................. 488
If you have a flat tire ..........................535
Inflation pressure................................ 497
Replacing ...............................................535
Rotating tires ....................................... 488
Size ...........................................................569
Snow tires ............................................. 388
Spare tire................................... 535, 569
Tire pressure warning system .....489
Warning light ....................................... 525
Tools .......................................................... 535
Total load capacity............................... 562T
* : Refer to
the “NAVIGATION SYSTEM OWNER’S MANUAL”.
