2018 Lexus LC500 flat tire

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4-5. Using the driving support systems
WARNING
■Before using LKA system
Do not rely solely upon the LKA system. The LKA system does not automatically
drive the vehicle or reduce the amount of attention that must be paid to the area in front of the vehicle. The driver must
always assume full responsibility for driv- ing safely by paying careful attention to the surrounding conditions and operat-
ing the steering wheel to correct the path of the vehicle. Also, the driver must take adequate breaks when fatigued, such as
from driving for a long period of time. Failure to perform appropriate driving operations and pay careful attention may
lead to an accident, resulting in death or serious injury.
■To avoid operating LKA system by mistake
When not using the LKA system, use the LKA switch to turn the system off.
■Situations unsuitable for LKA system
Do not use the LKA system in the follow- ing situations.The system may not operate properly
and lead to an accident, resulting in death or serious injury.
●A spare tire, tire chains, etc. are equipped.
●When the tires have been excessively
worn, or when the tire inflation pres- sure is low.
●Tires which differ by structure, manu-facturer, brand or tread pattern are
used.
●Objects or patterns that could be mis- taken for white (yellow) lines are pres-ent on the side of the road (guardrails,
curbs, reflective poles, etc.).
●Vehicle is driven on a snow-covered road.
●White (yellow) lines are difficult to see due to rain, snow, fog, dust, etc.
●Asphalt repair marks, white (yellow) line marks, etc. are present due to road repair.
●Vehicle is driven in a temporary lane or
restricted lane due to construction work.
●Vehicle is driven on a road surface which is slippery due to rainy weather,
fallen snow, freezing, etc.
●Vehicle is driven in traffic lanes other than on highways and freeways.
●Vehicle is driven in a construction zone.
■Preventing LKA system malfunctions
and operations performed by mistake
●Do not modify the headlights or place
stickers, etc. on the surface of the lights.

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4-5. Using the driving support systems
WARNING
■Stopping distance when the ABS is operating may exceed that of normal conditions
The ABS is not designed to shorten the vehicle’s stopping distance. Always main-
tain a safe distance from the vehicle in front of you, especially in the following situations:
●When driving on dirt, gravel or snow-
covered roads
●When driving with tire chains
●When driving over bumps in the road
●When driving over roads with potholes or uneven surfaces
■TRC/VSC may not operate effec-tively when
Directional control and power may not be achievable while driving on slippery
road surfaces, even if the TRC/VSC sys- tem is operating.
Drive the vehicle carefully in conditions where stability and power may be lost.
■Hill- start assist control does not operate effectively when
●Do not overly rely on hill-start assist control. Hill-start assist control may
not operate effectively on steep inclines and roads covered with ice.
●Unlike the parking brake, hill-start assist control is not intended to hold
the vehicle stationary for an extended period of time. Do not attempt to use hill-start assist control to hold the vehi-
cle on an incline, as doing so may lead to an accident.
■When the TRC/VSC/ABS is acti-vated
The slip indicator light flashes. Always drive carefully. Reckless driving may
cause an accident. Exercise particular care when the indicator light flashes.
■When the TRC/VSC systems are turned off
Be especially careful and drive at a speed appropriate to the road conditions. As
these are the systems to help ensure vehicle stability and dr iving force, do not turn the TRC/VSC systems off unless
necessary.
■Secondary Collision Brake
Do not overly rely on the Secondary Col-
lision Brake. This system is designed to help reduce the possibility of further damage due to a secondary collision,
however, that effect changes according to various conditions. Overly relying on the system may result in death or serious
injury.
■Replacing tires
Make sure that all tires are of the speci-
fied size, brand, tread pattern and total load capacity. In addition, make sure that the tires are inflated to the recom-
mended tire inflation pressure level.
The ABS, TRC and VSC systems will not
function correctly if different tires are installed on the vehicle.
Contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer for further information when replacing tires or wheels.
■Handling of tires and the suspension
Using tires with any kind of problem or modifying the suspension will affect the driving assist systems, and may cause a
system to malfunction.

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4-6. Driving tips
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

6
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6
Maintenance and care
Maintenance and care
6-1. Maintenance and care
Cleaning and protecting the vehi-
cle exterior ................................ 304
Cleaning and protecting the vehi-
cle interior ................................. 307
6-2. Maintenance
Maintenance requirements ... 312
6-3. Do-it-yourself maintenance
Do-it-yourself service precautions
......................................................... 314
Hood ............................................... 316
Positioning a floor jack............. 316
Engine compartment................ 318
12-volt battery............................. 325
Tires ................................................ 327
Replacing the tire ...................... 339
Tire inflation pressure.............. 345
Wheels .......................................... 346
Air conditioning filter............... 347
Electronic key battery ............. 349
Checking and replacing fuses
........................................................ 350
Light bulbs .................................... 355

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6-2. Maintenance
Maintenance and care
●Appreciable loss of power
●Strange engine noises
●A fluid leak under the vehicle (However, water dripping from the air conditioning
system after use is normal.)
●Change in exhaust sound (This may indi-
cate a dangerous carbon monoxide leak. Drive with the windows open and have the exhaust system checked immedi-
ately.)
●Flat-looking tires, excessive tire squeal
when cornering, uneven tire wear
●Vehicle pulls to one side when driven
straight on a level road
●Strange noises related to suspension
movement
●Loss of brake effectiveness, spongy feel-
ing brake pedal, pedal almost touches the floor, vehicle pulls to one side when brak-ing
●Engine coolant temperature continually higher than normal ( P.88)
If you notice any of these clues, take your vehicle to any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer as soon as possible. Your vehicle
may need adjustment or repair.

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6-3. Do-it-yourself maintenance
6-3.Do-it-yourself maintenance
Do-it-yourself service pre-
cautions
If you perform maintenance by
yourself, be sure to follow the cor-
rect procedure as given in these
sections.
Maintenance
ItemsParts and tools
12-volt battery
condition
( P.325)
•Grease
• Conventional wrench
(for terminal clamp
bolts)
Engine coolant
level (LC500)
( P.322)
• “Toyota Super Long Life
Coolant” or a similar
high quality ethylene
glycol-based non-sili-
cate, non-amine, non-
nitrite and non-borate
coolant with long-life
hybrid organic acid
technology
“Toyota Super Long Life
Coolant” is pre-mixed
with 50% coolant and
50% deionized water.
• Funnel (used only for
adding coolant)
Engine/power
control unit
coolant level
(LC500h)
( P.322)
• “Toyota Super Long Life
Coolant” or a similar
high quality ethylene
glycol-based non-sili-
cate, non-amine, non-
nitrite and non-borate
coolant with long-life
hybrid organic acid
technology
“Toyota Super Long Life
Coolant” is pre-mixed
with 50% coolant and
50% deionized water.
•Funnel (used only for
adding coolant)
Engine oil level
( P.319)
•“Toyota Genuine Motor
Oil” or equivalent
• Rag or paper towel
•Funnel (used only for
adding engine oil)
Fuses
( P.350)
•Fuse with same amper-
age rating as original
Light bulbs
( P.355)
• Bulb with same number
and wattage rating as
original
Radiator and
condenser
( P.323)

Tire inflation
pressure
( P.345)
• Tire pressure gauge
• Compressed air source
Washer fluid
( P.324)
• Water or washer fluid
containing antifreeze
(for winter use)
•Funnel (used only for
adding water or washer
fluid)
ItemsParts and tools

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6-3. Do-it-yourself maintenance
■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 any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer.
■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.
■Low profile tires (21-inch tires)
Generally, low profile tires will wear more rapidly and tire grip performance will be reduced on snowy and/or icy roads when
compared to standard tires. Be sure to use snow tires on snowy and/or icy roads and drive carefully at a speed appropriate for
road and weather conditions.
■If the tread on snow tires wears down below 4 mm (0.16 in.)
The effectiveness of the tires as snow tires is lost.
Rotate the tires in the order shown.
WARNING
■When inspecting or replacing tires
Observe the following precautions to
prevent accidents. Failure to do so may cause damage to parts of the drivetrain as well as danger-
ous handling characteristics, which may lead to an accident resulting in death or serious injury.
●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-belted 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.
■Low profile tires (21-inch tires)
Low profile tires may cause greater dam- age than usual to the tire wheel when
sustaining impact from the road surface. Therefore, pay attention to the following:
●Be sure to use proper tire inflation pressure. If tires are under-inflated,
they may be damaged more severely.
●Avoid potholes, uneven pavement, curbs and other road hazards. Failure to do so may lead to severe tire and
wheel damage.
■If tire inflation pressure of each tire becomes low while driving
Do not continue driving, or your tires and/or wheels may be ruined.
Tire rotation

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6-3. Do-it-yourself maintenance
Maintenance and care
Vehicles with front and rear tires of
the same size
Vehicles with front and rear tires of
differing sizes
To equalize tire wear and help extend tire
life, Lexus recommends that tire rotation is
carried out approximately every 10000
km (6000 miles).
Do not fail to initialize the tire pressure
warning system after tire rotation.
■When rotating the tires
Make sure that the engine switch is off. If the tires are rotated while
the engine switch is in IGNITION ON mode , the tire position information will not be updated.
If this accidentally occurs, either turn the engine switch to off and then to IGNITION ON mode ,
or initialize the tire pr essure warning system after checking that the tire pressure is prop-erly adjusted.
When run-flat tires are installed, the
vehicle can be driven for a maximum of
160 km (100 miles) at a speed below
80 km/h (50 mph) after any tire goes
flat. (However, the vehicle speed may
not increase to near 80 km/h [50
mph] depending on weather or driving
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 160 km
(100 miles). 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 performanc e 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 tire inflation pressure
before serious problems arise.
 If the tire pressure drops below a
predetermined level, the driver is
warned by a screen display and a
warning light. ( P.374)
 The tire pressure detected by the
tire pressure warning system can be
displayed on the multi-information
Run-flat tires
Tire pressure warning system