2018 LEXUS LS500H winter tires

13Pictorial index
LS500h_OM_OM50F42U_(U) Precautions for winter season .. ...................................................................................P.309
To prevent freezing (windshield wiper de-icer) *
................................................. P.327
Precautions for car wash .................................................................................................P.371
Fuel filler door .......................................................................................................... P.194
Refueling method .............................................................................................................. P .194
Fuel type/fuel tank capacity ......... ..................................................................................P.461
Tires.......................................................................................................................... ..P.395
Tire size/inflation pressure ............................ ................................................... P.395, 466
Winter tires/tire chains ..................................................................................................P.309
Checking/rotation/tire pressure warning system..............................................P.395
Coping with flat tires........................................................................................................ P .442
Hood ......................................................................................................................... P. 385
Opening ........................................................................................................................ .......P.385
Engine compartment cover ........................................................................................ P.388
Engine oil ..................................................................................................................... ......... P.462
Coping with overheating ............................................................................................... P.453
Warning messages .......................................................................................................... P.437
Headlights/cornering lights ................................................................................P.185
Parking lights/daytime running lights...............................................................P.185
Turn signal lights ..................................................................................................... P.180
Tail lights .................................................................................................................... P.185
Stop lights
Hill-start assist control ....................................................................................................P. 303
License plate lights .................................................................................................P.185
Back-up lights
Changing the shift position to R....................................................................................P.174
Side marker lights ...................................................................................................P.185 *
:If equipped Light bulbs of the exterior lights for driving
(Replacing method: P.417) E
F
G
H
I
J
K
L
M
N

308 4-6. Driving tips
LS500h_OM_OM50F42U_(U) Control and maintain the vehicle at a
constant speed. Before stopping at a
toll booth or similar, allow plenty of
time to release the accelerator and
gently apply the brakes. A greater
amount of electrical energy can be
regenerated when slowing down.
Use the air conditioning only when
necessary. Doing so can help reduce
excessive gasoline consumption.
In summer: When the ambient tem-
perature is high, use the recirculated
air mode. Doing so will help to reduce
the burden on the air conditioning sys-
tem and reduce fuel consumption as
well.
In winter: Because the gasoline engine
will not automatically cut out until it and
the interior of the vehicle are warm, it
will consume fuel. Also, fuel consump-
tion can be improved by avoiding over-
use of the heater.
Make sure to check the tire inflation
pressure frequently. Improper tire infla-
tion pressure can cause poor fuel
economy.
Also, as snow tires can cause large
amounts of friction, their use on dry
roads can lead to poor fuel economy.
Use tires that are appropriate for the
season. Carrying heavy luggage will lead to
poor fuel economy. Avoid carrying
unnecessary luggage. Installing a large
roof rack will also cause poor fuel
economy.
Since the gasoline engine starts up and
cuts out automatically when cold,
warming up the engine is unnecessary.
Moreover, frequently driving short dis-
tances will cause the engine to repeat-
edly warm up, which can lead to excess
fuel consumption.Highway driving
Air conditioning
Checking tire inflation pressure Luggage
Warming up before driving

3094-6. Driving tips
LS500h_OM_OM50F42U_(U) 4
Driving  Use fluids that are appropriate to
the prevailing outside temperatures. •Engine oil
• Engine/power control unit coolant
•Washer fluid
 Have a service technician inspect
the condition of the 12-volt battery.
 Have the vehicle fitted with four
snow tires or purchase a set of tire
chains for the rear tires. *
Ensure that all tires are the specified size
and brand, and that chains match the size
of the tires. *
: Tire chains cannot be mounted on vehi-
cles with front and rear tires of differing
sizes.Winter driving tips Carry out the necessary prepara-
tions and inspections before driving
the vehicle in winter. Always drive
the vehicle in a manner appropriate
to the prevailing weather condi-
tions.
Preparation for winter
WARNING
■
Driving with snow tires
Observe the following precautions to
reduce the risk of accidents.
Failure to do so may result in a loss of
vehicle control and cause death or seri-
ous injury.
●
Use tires of the specified size.
●
Maintain the recommended level of air
pressure. ●
Do not drive in excess of 75 mph (120
km/h), regardless of the type of snow
tires being used. ●
Use snow tires on all, not just some
wheels. ■
When installing tire chains
Before installing tire chains, make sure to
disable all functions of the vehicle height
control of the electronically modulated
air suspension. Otherwise, the vehicle
height may change while installing the
tire chains and part or your body may be
caught under the vehicle, possibly caus-
ing injury. ( → P.301)■
Driving with tire chains
Observe the following precautions to
reduce the risk of accidents.
Failure to do so may result in the vehicle
being unable to be driven safely, and may
cause death or serious injury. ●
Do not drive in excess of the speed
limit specified for the tire chains being
used, or 30 mph (50 km/h), which-
ever is lower. ●
Avoid driving on bumpy road surfaces
or over potholes. ●
Avoid sudden acceleration, abrupt
steering, sudden br aking and shifting
operations that cause sudden engine
braking.
●
Slow down sufficiently before entering
a curve to ensure that vehicle control is
maintained.
●
Do not use LTA (Lane Tracing Assist)
system. (if equipped)
●
Do not use LKA (Lane-Keeping
Assist) system. (if equipped)

396 6-3. Do-it-yourself maintenance
LS500h_OM_OM50F42U_(U) ■
When to replace your vehicle’s tires
Tires should be replaced if: ●
The treadwear indicators are showing on
a tire.●
You have tire damage such as cuts, splits,
cracks deep enough to expose the fabric,
and bulges indicating internal damage●
A tire goes flat repeatedly or cannot be
properly repaired due to the size or loca-
tion of a cut or other damage
If you are not sure, consult with your Lexus
dealer. ■
Tire life
Any tire over 6 years old must be checked
by a qualified technician even if it has sel-
dom or never been used or damage is not
obvious. ■
Maximum load of tire
Check that the maximum load of the
replacement tire is greater than 1/2 of the
Gross Axle Weight Ratings (GAWR) of
either the front axle or the rear axle, which-
ever is greater.
For the GAWR, see the Certification Label.
For the maximum load of the tire, see the
load limit at maximum cold tire inflation
pressure mentioned on the sidewall of the
tire. ( → P.472)
■
Tire types
●
Summer tires
Summer tires are high-speed performance
tires 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 roads, the use of snow tires is recom-
mended. 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,
however, do not have adequate traction
performance compared with snow tires in
heavy or loose snow. Also, all season tires
fall short in accelerati on and handling per-
formance 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 tires of the
same size, construction and load capacity
as the originally instal led tires. Since your
vehicle has radial tires as original equip-
ment, make sure your snow tires also have
radial construction. Do not install studded
tires without first checking local regula-
tions for possible restrictions. Snow tires
should be installed on all wheels.
( → P.309) ■
If the tread on snow tires wears down
below 0.16 in. (4 mm)
The effectiveness of the tires as snow tires is
lost.
WARNING
■
When inspecting or replacing tires
Observe the following precautions to
prevent accidents.
Failure to do so may cause damage to
parts of the drive train as well as danger-
ous handling characteristics, which may
lead to an accident resulting in death or
serious injury.

5191-1. What to do if... (Troubleshooting)
LS500h_OM_OM50F42U_(U) 519Alphabetical Index
Preparing and checking before winter
.........................................................................309
Power easy access system ........................139
Power outlets ................................................ 353
Power rear seat ..............................................135
Power steering (Elect ric power steering
system).......................................................... 303
Warning light ...............................................430
Power switch .................................................. 168
Auto power off function .............................171
Changing the power switch modes ..170
Power switch (engine switch)
If your vehicle has to be stopped in an
emergency ................................................ 420
Power trunk opener and closer ............... 114
Power windows
Door lock linked window operation..152
Jam protection function............................. 151
Operation......................................................... 151
Window lock switch ..................................153
Pre-Collision System (PCS)
Function ..............................................209, 220
PCS OFF switch ...............................212, 222
Warning light ............................................... 433
Warning message........................... 219, 226
R
Radar cruise control (dynamic radar cruise
control with full-speed range).. 247, 250
Radiator .............................................................391
RCD (Rear camera detection) .............. 265
Warning message..................................... 278
RCD (Rear Camera Detection)
Function ...........................................................277
RCTA
Function .......................................................... 273
Warning message..................................... 274
RCTA (Rear Cross Traffic Alert) ......... 265
RCTA function ..............................................274
Rear air conditioning system .................. 333
Rear Cross Traffic Alert (RCTA) ......... 273
Rear door sunshades ..... ............................ 355 Rear Multi Operation Pa nel .................... 318
Rear seat position memory .......................143
Rear seats .........................................................135
Adjustment ..................................................... 135
Head restraints..............................................144
Rear seat position memory.....................143
Relaxation system ....................................... 138
Seat heaters ..................................................336
Seat ventilators ............................................336
Rear side marker lights
Light switch .................................................... 185
Replacing light bulbs ..................................417
Rear sunshades ............................................ 356
Rear turn signal lights
Replacing light bulbs ..................................417
Turn signal lever .......................................... 180
Rear view mirror
Inside rear view mirror ............................. 148
Outside rear view mirrors...................... 149
Rear window defogger ............................. 324
Refueling
Capacity .......................................................... 461
Fuel types ........................................................ 461
If the fuel filler do or cannot be opened
..........................................................................445
Opening the fuel tank cap ..................... 194
Regenerative braking ................................... 59
Remote Touch ................................................314
Replacing
Electronic key battery ................................413
Fuses...................................................................414
Light bulbs .......................................................417
Tires ................................................................. 405
Resetting the message indicating mainte-
nance is required ...................................... 378
Rev indicator .................................................... 83
Rev peak............................................................. 83
Road Sign Assist ...........................................247
RSA (Road Sign Assist) .............................247
Run-flat tires........................................ 397, 442