2018 LEXUS LS500 run flat

13Pictorial index
LS500_OM_OM50F54U_(U) Precautions for winter season .. ................................................................................... P.299
To prevent freezing (windshield wiper de-icer) *
...................................................P.317
Precautions for car wash ............................................................................................... P.363
Fuel filler door ..........................................................................................................P.185
Refueling method .............................................................................................................. P .185
Fuel type/fuel tank capacity ...... ................................................................................... P.449
Tires.......................................................................................................................... .P.386
Tire size/inflation pressure ............................ ................................................... P.386, 454
Winter tires/tire chains .................................................................................................. P.299
Checking/rotation/tire pressu re warning system..............................................P.386
Coping with flat tires........................................................................................................ P .432
Hood .......................................................................................................................... P .375
Opening ........................................................................................................................ ....... P.375
Engine compartment cover ......................................................................................... P.378
Engine oil ..................................................................................................................... .........P.450
Coping with overheating ............................................................................................... P.443
Warning messages .......................................................................................................... P.428
Headlights/cornering lights ................................................................................ P.175
Parking lights/daytime running lights............................................................... P.175
Turn signal lights ...................................................................................................... P.169
Tail lights .................................................................................................................... P.175
Stop lights
Hill-start assist control .................................................................................................... P. 294
License plate lights ................................................................................................. P.175
Back-up lights
Changing the shift position to R................................................................................... P.163
Side marker lights ................................................................................................... P.175 *
:If equipped Light bulbs of the exterior lights for driving
(Replacing method: P.408) E
F
G
H
I
J
K
L
M
N

2034-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving ■
Enabling/disabling the pre-colli-
sion system
The pre-collision system can be
enabled/disabled on ( → P.76) of
the multi-information display. The system is automa tically enabled each
time the engine switch is turned to IGNI-
TION ON mode
If the system is disabled, the PCS warn-
ing light will turn on and a message will
be displayed on the multi-information
display.
If the pre-collision sy stem is disabled,
the pedestrian alert system will also be
disabled. At this time, the FCTA (Front
Cross Traffic Alert) ( → P.218) system
will also be disabled.
■
Enabling/Disabling the pedestrian
alert system
The pedestrian alert can be
enabled/disabled on ( → P.76) of
the multi-information display. At this
time, the FCTA (Front Cross Traffic
Alert) system will also be enabled/dis-
abled.WARNING●
When your vehicle is towing another
vehicle●
When transporting the vehicle via
truck, boat, train or similar means of
transportation●
When the vehicle is raised on a lift with
the engine running and the tires are
allowed to rotate freely●
When inspecting the vehicle using a
drum tester such as a chassis dyna-
mometer or speedometer tester, or
when using an on vehicle wheel bal-
ancer●
When a strong impact has been
applied to the front bumper, rear
bumper or front grille, due to an acci-
dent or other situation●
If the vehicle cannot be driven in a sta-
ble manner, such as when the vehicle
has been in an accident or is malfunc-
tioning●
When the vehicle is driven in a sporty
manner or off-road●
When the tires are not properly
inflated
●
When the tires are very worn
●
When tires of a size other than speci-
fied are installed
●
When tire chains are installed
●
When a compact spare tire or an
emergency tire puncture repair kit is
used
●
If equipment (snow plow, etc.) that may
obstruct a sensor is temporarily
installed to the vehicle Changing settings of the pre-col-
lision system

2174-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving • The vehicle is wobbling.
• The vehicle is being driven at extremely
high speeds.
• When driving on a hill
• If the radar sensor or camera sensor is
misaligned●
In some situations such as the following,
sufficient braking force may not be
obtained, preventing the system from
performing properly:
• If the braking functions cannot operate to
their full extent, such as when the brake
parts are extremely cold, extremely hot,
or wet
• If the vehicle is not properly maintained
(brakes or tires are excessively worn,
improper tire inflation pressure, etc.)
• When the vehicle is being driven on a
gravel road or other slippery surface●
Some pedestrians such as the following
may not be detected by the radar sensor
and camera sensor, preventing the sys-
tem from operating properly:
• Pedestrians shorter than approximately
3.2 ft. (1 m) or tall er than approximately
6.5 ft. (2 m)
• Pedestrians wearing oversized clothing
(a rain coat, long skir t, etc.), making their
silhouette obscure
• Pedestrians who are carrying large bag-
gage, holding an umbrella, etc., hiding
part of their body
• Pedestrians who are bending forward or
squatting
• Pedestrians who are pushing a stroller,
wheelchair, bicycle or other vehicle
• Groups of pedestrians which are close
together
• Pedestrians who are wearing white and
look extremely bright
• Pedestrians in the dark, such as at night
or while in a tunnel
• Pedestrians whose clothing appears to
be nearly the same co lor or brightness as
their surroundings
• Pedestrians near walls , fences, guardrails,
or large objects
• Pedestrians who are on a metal object
(manhole cover, steel plate, etc.) on the
road
• Pedestrians who are walking fast
• Pedestrians who are changing speed
abruptly • Pedestrians running out from behind a
vehicle or a large object
• Pedestrians who are extremely close to
the side of the vehicle (outside rear view
mirror, etc.) ■
If the PCS warning light flashes or illumi-
nates and a warning message is dis-
played on the multi-information display
The pre-collision system may be temporar-
ily unavailable or there may be a malfunc-
tion in the system. ●
In the following situations, the warning
light will turn off, the message will disap-
pear and the system will become opera-
tional when normal operating conditions
return:
• When the radar sensor or camera sensor
or the area around either sensor is hot,
such as in the sun
• When the radar sensor or camera sensor
or the area around either sensor is cold,
such as in an extremely cold environment
• When a front sensor is dirty or covered
with snow, etc.
• When the part of the windshield in front
of the camera sensor is fogged up or cov-
ered with condensation or ice (Defog-
ging the windshield: → P.314)
• If the camera sensor is obstructed, such
as when the hood is open or a sticker is
attached to the windshield near the cam-
era sensor ●
If the PCS warning light continues to flash
or remains illuminated or the warning
message does not disappear even
though the vehicle has returned to nor-
mal, the system may be malfunctioning.
Have the vehicle inspected by your Lexus
dealer immediately.
■
If VSC is disabled
●
If VSC is disabled ( → P.294), the pre-col-
lision brake assist and pre-collision brak-
ing functions are also disabled.
●
The PCS warning light will turn on and
“VSC Turned Off Pre-Collision Brake
System Unavailable” will be displayed on
the multi-information display.

3716-2. Maintenance
LS500_OM_OM50F54U_(U) 6
Maintenance and care Parking brake • Does the parking
brake operate nor-
mally?
•When parked on a
slope and the park-
ing brake is on, is the
vehicle securely
stopped?
Seat belts • Do the seat belts
operate smoothly?
• The seat belts should
not be damaged.
Seats • Do the seat controls
operate properly?
Steering wheel • Does the steering
wheel rotate
smoothly?
• Does the steering
wheel have the cor-
rect amount of free
play?
•There should not be
any strange sounds
coming from the
steering wheel.
Vehicle exterior Items Check points
Doors/trunk • Do the doors/trunk
operate smoothly?
Engine hood •Does the engine
hood lock system
work properly?
Fluid leaks •There should not be
any signs of fluid
leakage after the
vehicle has been
parked.Items Check points
Tires • Is the tire inflation
pressure correct?
• The tires should not
be damaged or
excessively worn.
• Have the tires been
rotated according to
the maintenance
schedule?
•The wheel nuts
should not be loose.
Windshield wip-
ers • The wiper blades
should not show any
signs of cracking,
splitting, wear, con-
tamination or defor-
mation.
• The wiper blades
should clear the
windshield without
streaking or skip-
ping.Items Check points

374 6-3. Do-it-yourself maintenance
LS500_OM_OM50F54U_(U) Tire inflation pres-
sure ( → P.399) • Tire pressure gauge
•Compressed air
source
Washer fluid
( → P.383) • Water or washer
fluid containing anti-
freeze (for winter
use)
• Funnel (used only for
adding water or
washer fluid)
WARNING
The engine compartment contains many
mechanisms and fluids that may move
suddenly, become hot, or become elec-
trically energized. To avoid death or seri-
ous injury, observe the following
precautions. ■
When working on the engine com-
partment●
Keep hands, clothi ng and tools away
from the moving fan and engine drive
belt.●
Be careful not to touch the engine,
radiator, exhaust manifold, etc. right
after driving as they may be hot. Oil
and other fluids may also be hot.
●
Do not leave anything that may burn
easily, such as paper and rags, in the
engine compartment.
●
Do not smoke, cause sparks or expose
an open flame to fuel. Fuel fumes are
flammable.
■
When working near the electric cool-
ing fan or radiator grille
Be sure the engine switch is off.
With the engine switch in IGNITION
ON mode, the electric cooling fan may
automatically start to run if the air condi-
tioning is on and/or the coolant tempera-
ture is high. ( → P.382)Items Parts and tools ■
Safety glasses
Wear safety glasses to prevent flying or
falling material, fluid spray, etc. from get-
ting in your eyes.
NOTICE■
If you remove the air cleaner filter
Driving with the air cleaner filter
removed may cause excessive engine
wear due to dirt in the air.

388 6-3. Do-it-yourself maintenance
LS500_OM_OM50F54U_(U) 
Vehicles with front and rear tires of
the same size
Rotate the tires in the order shown. To equalize tire wear and extend tire life,
Lexus recommends that tire rotation is car-
ried out at the same in terval as tire inspec-
tion.
Do not fail to initialize the tire pressure
warning system after tire rotation. 
Vehicles with front and rear tires of
differing sizes
Tires cannot be rotated.
When run-flat tires are installed, the
vehicle can be driven for a maximum of
100 miles (160 km) at a speed below
50 mph (80 km/h) after any tire goes
flat. (However, the vehicle speed may
not increase to near 50 mph [80
km/h] depending on weather or driv-
ing conditions.)
A run-flat tire has a mark on
the side wall. Make sure to replace the flat tire before the
vehicle has been driven for near 100 miles
(160 km). Also, do not use a repaired tire.
■
Run-flat tires ●
The run-flat tires are for only this vehicle.
Do not use the tires on other vehicles. ●
Do not mix run-flat tires and normal tires.
●
If non-genuine Lexus wheels are used, it
may be impossible to sufficiently demon-
strate the performance of run-flat tires.
Your vehicle is equipped with a tire
pressure warning system that uses tire
pressure warning valves and transmit-
ters to detect low ti re inflation pressure WARNING●
Do not mix tires of different makes,
models or tread patterns.
Also, do not mix tires of remarkably
different treadwear.●
Do not use tire sizes other than those
recommended by Lexus.●
Do not mix differently constructed
tires (radial, bias-b elted or bias-ply
tires).●
Do not mix summer, all season and
snow tires.●
Do not use tires that have been used
on another vehicle.
Do not use tires if you do not know
how they were used previously.
NOTICE■
Driving on rough roads
Take particular care when driving on
roads with loose surfaces or potholes.
These conditions may cause losses in tire
inflation pressure, reducing the cushion-
ing ability of the tires. In addition, driving
on rough roads may cause damage to
the tires themselves, as well as the vehi-
cle’s wheels and body.
Tire rotation Run-flat tires
Tire pressure warning system

3896-3. Do-it-yourself maintenance
LS500_OM_OM50F54U_(U) 6
Maintenance and care before serious problems arise.
 The tire pressure detected by the
tire pressure warning system can be
displayed on the multi-information
display. ( → P.76)
 If the tire pressure drops below a
predetermined level, the driver is
warned by a screen display and a
warning light. ( → P.422)
■
Routine tire inflation pressure checks
The tire pressure warning system does not
replace routine tire inflation pressure
checks. Make sure to check tire inflation
pressure as part of your routine of daily
vehicle checks.
■
Tire inflation pressure
●
It may take a few minutes to display the
tire inflation pressure after the engine
switch is turned to IGNITION ON mode.
It may also take a few minutes to display
the tire inflation pres sure after inflation
pressure has been adjusted.
●
Tire inflation pressu re changes with tem-
perature. The displayed values may also be different from the values measured
using a tire pressure gauge. ■
Situations in which the tire pressure
warning system may not operate prop-
erly ●
In the following cases, the tire pressure
warning system may not operate prop-
erly.
• If non-genuine Lexus wheels are used.
• If a tire has been replaced with a tire that
is not an OE (Original Equipment) tire.
• If a tire has been replaced with a tire that
is not of the specified size.
• If tire chains, etc. are installed.
• 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 vehi-
cle, particularly around the wheels or
wheel housings.
• If the tire inflation pressure is much higher
than the specified level.
• If wheels not equipped with tire pressure
warning valves and transmitter are used.
• If the ID code on the tire pressure warn-
ing valves and transmitters is not regis-
tered in the tire pressure warning
computer. ●
Performance may be af fected in the fol-
lowing situations.
• When driving near a TV tower, electric
power plant, gas stat ion, radio station,
large display, airport or other facility that
generates strong radi o waves or electri-
cal noise
• When carrying a portable radio, cellular
phone, cordless phone or other wireless
communication device
If tire position information is not correctly
displayed due to the radio wave conditions,
the display may be corrected by changing
the location of the vehicle as the radio wave
conditions may change.
●
When the vehicle is stopped, the time
taken for the warning to start or turn off
may be longer.
●
When the inflation pressure of a tire
drops rapidly, for example when a tire has
burst, the warning may not operate.

396 6-3. Do-it-yourself maintenance
LS500_OM_OM50F54U_(U)  Stop the vehicle in a safe place on a
hard, flat surface.
 Set the parking brake.
 Shift the shift position to P.
 Disabling the height control. (if
equipped) ( → P.293)
 Stop the engine. ■
Jack and tools
As your vehicle is equipped with run-flat
tires, the following tools for replacing a tire
are not included with your vehicle. They can
be purchased at your Lexus dealer. ●
Wheel nut wrench●
Jack●
Jack handleReplacing the tire When raising your vehicle with a
jack, position the jack correctly.
Improper placement may damage
your vehicle or cause injury.
If necessary tire replacement
seems difficult to perform, contact
your Lexus dealer.
Before jacking up the vehicle WARNING■
Using the tire jack
Observe the following precautions.
Improper use of the tire jack may cause
the vehicle to suddenly fall off the jack,
leading to death or serious injury. ●
Do not use the tire jack for any pur-
pose other than replacing tires or
installing and removing tire chains. ●
Do not use other tire jacks for replac-
ing tires on this vehicle. ●
Put the jack properly in its jack point. ●
Do not put any part of your body under
the vehicle while it is supported by the
jack. ●
Do not start the engine or drive the
vehicle while the vehicle is supported
by the jack. ●
Do not raise the vehicle while some-
one is inside. ●
When raising the vehicle, do not put an
object on or under the jack. ●
Do not raise the vehicle to a height
greater than that required to replace
the tire. ●
Use a jack stand if it is necessary to get
under the vehicle. ●
Make sure to disable all functions of
the vehicle height control of the elec-
tronically modulated air suspension
and then stopping the engine.
( → P.293)●
When lowering the vehicle, make sure
that there is no-one near the vehicle. If
there are people nearby, warn them
vocally before lowering.