Page 506 of 676
5066-3. Do-it-yourself maintenance
LS600h/LS600hL_EE(OM50G20E)
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.
Tires
Replace or rotate tires in accord ance with maintenance schedules and
treadwear.
Checking tires
1
2
3
Page 511 of 676

5116-3. Do-it-yourself maintenance
6
Maintenance and care
LS600h/LS600hL_EE(OM50G20E)
■If the tread on snow tires wears down below 4 mm (0.16 in.)
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 extr emely 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 which can interfere with signal reception is put in the
trunk.*
• If tires not equipped with tire pressure warning valves and transmitters are used.
• If the ID code on the tire pressure warning valves and transmitters is not regis-
tered in the tire pressure warning computer.
*: Vehicles with a spare tire
●Performance may be affected in the following situations.
• Near a TV tower, electric power plant, gas station, radio station, large display,
airport or other facility th at generates strong radio waves or electrical noise
• When carrying a portable radio, cellular phone, cordless phone or other wire-
less communication device
If tire position information is not correctly displayed due to the radio wave condi-
tions, the display may be corrected by driving and changing the radio wave condi-
tions.
●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 568 of 676
5687-2. Steps to take in an emergency
LS600h/LS600hL_EE(OM50G20E)
Location of the spare tire, jack and tools
Parking brake release tool
Jack handle
Wheel nut wrench
Jack
Tools
Screwdriver
Spare tire
Towing eyelet
1
2
3
4
5
6
7
8
Page 670 of 676

670Alphabetical index
LS600h/LS600hL_EE(OM50G20E)
Side mirrors...............................................221
Adjusting and folding......................... 221
BSM (Blind Spot Monitor) ...........366
Linked mirror function when
reversing ............................................. 223
Mirror position memory................. 207
Side turn signal lights........................... 262
Replacing light bulbs........................ 543
Turn signal lever ................................. 262
Smart entry & start system................. 149
Antenna location..................................152
Entry functions.......................................149
Starting the hybrid system............. 247
Snow mode .............................................258
Snow tires................................................. 387
Spare tire .................................................. 567
Inflation pressure............................... 630
Storage location ................................ 568
Spark plug................................................ 627
Specifications .........................................620
Speedometer ............................................115
Sport mode.............................................. 334
Steering lock .......................................... 249
Column lock release ....................... 249
Steering wheel.........................................218
Adjustment ............................................. 218
Heated steering wheel ................... 454
Power easy access system.............190
Steering wheel position
memory .............................................. 207
Stop lights
Emergency brake signal................ 339
Replacing light bulbs ....................... 543
Storage feature .......................................431
Stuck
If the vehicle becomes stuck ......... 616
Sun shade
Rear .......................................................... 464
Rear door .............................................. 468
Roof .......................................................... 230
Sun visors ................................................. 445