tires lexus LC500 2018 User Guide

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4-5. Using the driving support systems
●The vehicle is driven on a surface that is bright due to reflected light, etc.
●The vehicle is driven in an area where the brightness changes suddenly, such as at the entrances and exits of tunnels, etc.
●Light from the headlights of an oncoming vehicle, the sun, etc. enters the camera.
●The vehicle is driven where the road diverges, merges, etc.
●The vehicle is driven on a slope.
●The vehicle is driven on a road which tilts left or right, or a winding road.
●The vehicle is driven on an unpaved or rough road.
●The vehicle is driven around a sharp curve.
●The traffic lane is excessively narrow or wide.
●The vehicle is extremely tilted due to car-rying heavy luggage or having improper tire pressure.
●The distance to the preceding vehicle is extremely short.
●The vehicle is moving up and down a
large amount due to road conditions during driving (poor roads or road seams).
●The headlight lenses are dirty and emit a faint amount of light at night, or the beam
axis has deviated.
●The vehicle is struck by a crosswind.
●The vehicle has just changed lanes or crossed an intersection.
●Snow tires, etc. are equipped.
■Warning message
If the following warning message is dis- played on the multi-information display and the LKA indicator illuminates in orange, fol-
low the appropriate troubleshooting proce- dure.
Warning mes-
sageDetails/Actions
“Lane Keep-
ing Assist
Malfunction
Visit Your
Dealer”
The system may not be
operating properly.
 Have the vehicle
inspected any authorized
Lexus retailer or Lexus
authorized repairer, or
any reliable repairer.
“Front Cam-
era Vision
Blocked
Clean and
Demist Wind-
shield”
Dirt, rain, condensation,
ice, snow, etc. are present
on the windshield in front
of the camera sensor.
 Turn the LKA system
off, remove any dirt, rain,
condensation, ice, snow,
etc. from the windshield,
and then turn the LKA sys-
tem back on.
“Front Cam-
era Unavail-
able”
The operation conditions
of the camera sensor
(temperature, etc.) are
not met.
 When the operation
conditions of the camera
sensor (temperature, etc.)
are met, the LKA system
will become available.
Turn the LKA system off,
wait for a little while, and
then turn the LKA system
back on.

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4-5. Using the driving support systems
• When the sensor is misaligned due to a strong impact to the sensor or its sur-rounding area
• When the distance between your vehicle and a guardrail, wall, etc. that enters the detection area is short
• When driving up and down consecutive steep inclines, such as hills, dips in the road, etc.
• When vehicle lanes are narrow, or when driving on the edge of a lane, and a vehi-cle traveling in a lane other than the adja-
cent lanes enters the detection area • When driving on roads with sharp bends, consecutive curves, or uneven surfaces
• When the tires are slipping or spinning • When the distance between your vehicle and a following vehicle is short
• When an accessory (such as a bicycle carrier) or towing eyelet is installed to the rear of the vehicle
■Operation of the RCTA function
The RCTA function uses radar sensors to detect vehicles approaching from the
right or left at the rear of the vehicle and alerts the driver of the presence of such
vehicles by flashing the outside rear view mirror indicators and sounding a buzzer.
Approaching vehicles
Detection areas of approaching vehicles
■RCTA icon display
When a vehicle approaching from the
right or left at the rear of the vehicle is
detected, the following will be dis-
played on the monitor screen
WARNING
■Cautions regarding the use of the function
The driver is solely responsible for safe driving. Always drive safely, taking care to observe your surroundings.
The BSM function is a supplementary function which alerts the driver that a
vehicle is in a blind spot of the outside rear view mirrors or is approaching rap-idly from behind into a blind spot. Do not
overly rely on the BSM function. As the function cannot judge if it is safe to change lanes, over reliance could lead to
an accident resulting in death or serious injury.
As the system may not function correctly under certain conditions, the driver’s own visual confirmation of safety is necessary.
RCTA function
A
B

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4-5. Using the driving support systems
Driving
■EPS, VGRS and DRS operation sound
When the steering wheel is operated, a
motor sound (whirring sound) may be heard. This does not indicate a malfunction.
■Automatic reactivation of TRC and VSC systems
After turning the TRC and VSC systems off, the systems will be automatically re-
enabled in the following situations:
●When the engine switch
is turned off
●If only the TRC system is turned off, the
TRC will turn on when vehicle speed increases
If both the TRC and VSC systems are turned off, automatic re-enabling will not occur when vehicle speed increases.
■Secondary Collision Brake operating
conditions
The vehicle speed is approximately 10 km/h
(6 mph) or more and the airbag sensor detects a collision. (The Secondary Colli-sion Brake will not operate when the vehicle
speed is below approximately 10 km/h [6 mph].)
■Secondary Collision Brake automatic
cancellation
The Secondary Collision Brake is automati-
cally canceled in the following situations:
●The vehicle speed drops below approxi-
mately 10 km/h (6 mph)
●A certain amount of time elapses during
operation
●The accelerator pedal is depressed a
large amount
■If “Check Secondary Collision Brake system” is displayed on the multi-infor-mation display
The system may be malfunctioning. Have the vehicle inspected at any authorized
Lexus retailer or Lexus authorized repairer, or any reliable repairer.
■Reduced effectiveness of the EPS sys-tem
The effectiveness of the EPS system is
reduced to prevent the system from over- heating when there is frequent steering input over an extended period of time. The
steering wheel may feel heavy as a result. Should this occur, refrain from excessive steering input or stop the vehicle and turn
the engine off. The EPS sys- tem should return to normal within 10 min-utes.
■Operating conditions of emergency
brake signal
When the following three conditions are
met, the emergency brake signal will oper- ate:
●The emergency flashers are off.
●Actual vehicle speed is over 55 km/h
(35 mph).
●The brake pedal is depressed in a manner
that cause the system to judge from the vehicle deceleration that this is a sudden braking operation.
■Automatic system cancelation of emer-
gency brake signal
The emergency brake sign al will turn off in
any of the following situations:
●The emergency flashers are turned on.
●The brake pedal is released.
●The system judges from the vehicle deceleration that is not a sudden braking
operation.
WARNING
■The ABS does not operate effectively when
●The limits of tire gripping performance have been exceeded (such as exces-
sively worn tires on a snow covered road).
●The vehicle hydroplanes while driving at high speed on wet or slick roads.

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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

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4-6. Driving tips
Driving
Use fluids that are appropriate to
the prevailing outside temperatures.
•Engine oil
•Engine coolant
• Power control unit coolant (LC500h)
•Washer fluid
 Have a service technician inspect
the condition of the 12-volt battery.
 Have the vehicle fitted with four
snow tires.
Ensure that all tires are the specified size
and the same brand.
 Tire chains can only be installed on
the rear tires. However, tire chains
cannot be installed on 275/35RF21
or 275/40RF20 rear tires.
Before installing tire ch ains, change all four
tires and wheels to those of the specified
size for use with tire chains (front tires:
245/45RF20, rear tires: 245/45RF20,
wheels: 20 x 8 1/2 J 25 inset). Use the
specified type of tire chains and install
them on the rear tires only.
For details, contact any authorized Lexus
retailer or Lexus authorized repairer, or
any reliable repairer.
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 at speeds in excess of the
speed limit or the speed limit specified for the snow tires being used.
●Use snow tires on all, not just some wheels.
■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 50 km/h (30 mph), which-
ever is lower.
●Avoid driving on bumpy road surfaces or over potholes.
●Avoid sudden acceleration, abrupt steering, sudden braking 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 LKA (Lane-Keeping Assist) system. (if equipped)

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4-6. Driving tips
Perform the following according to the
driving conditions:
 Do not try to forcibly open a window
or move a wiper that is frozen. Pour
warm water over the frozen area to
melt the ice. Wipe away the water
immediately to prevent it from
freezing.
 When the outside door handle is
frozen, unlock the doors using the
wireless remote control. If the out-
side door handles remain retracted
and do not move even if the doors
are unlocked using the wireless
remote control, pour warm water
over the frozen area to melt the ice
and wipe away the water immedi-
ately to prevent it from freezing. The
outside door handle may not retract
due to ice, however, the outside
door handle will return to the nor-
mal position after the ice melts.
 To ensure proper operation of the
climate control system fan, remove
any snow that has accumulated on
the air inlet vents in front of the
windshield.
 Check for and remove any excess
ice or snow that may have accumu-
lated on the exterior lights, vehicle’s
roof, chassis, around the tires or on
the brakes.
 Remove any snow or mud from the
bottom of your shoes before getting
in the vehicle.
■To protect windshield wipers
 P.198
Accelerate the vehicle slowly, keep a
safe distance between you and the
vehicle ahead, and drive at a reduced
speed suitable to road conditions.
Park the vehicle and shift the shift posi-
tion to P without setting the parking
brake. The parking brake may freeze
up, preventing it from being released. If
the vehicle is parked without setting
the parking brake, make sure to block
the wheels.
Failure to do so may be dangerous
because it may cause the vehicle to
move unexpectedly, possibly leading to
an accident.
NOTICE
■Repairing or replacing snow tires
Request repairs or re placement of snow
tires from any authorized Lexus retailer or Lexus authorized repairer, or any reli-able repairer.
This is because the removal and attach- ment of snow tires affects the operation
of the tire pressure warning valves and transmitters.
Before driving the vehicle
When driving the vehicle
When parking the vehicle

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4-6. Driving tips
Driving
Vehicles with front and rear tires of
the same size
Use the correct tire chain size when
mounting the tire chains.
Chain size is regulated for each tire
size.
Side chain (3 mm [0.12 in.] in diam-
eter)
Cross chain (4 mm [0.16 in.] in
diameter)
Vehicles with front and rear tires of
differing sizes
Tire chains cannot be mounted.
Snow tires should be used instead.
Regulations regarding the use of tire
chains vary dependin g on location and
type of road. Always check local regu-
lations before installing chains.
■Tire chain installation
Observe the following precautions when
installing and removing chains:
●Install and remove tire chains in a safe location.
●Install tire chains on the rear tires. Do not install tire chains on the front tires.
●Install tire chains on rear tires as tightly as possible. Retighten chains after driving 0.5 - 1.0 km (1/4 - 1/2 mile).
●Install tire chains following the instruc-tions provided with the tire chains.
To enable the windshield wipers to be
lifted when heavy snow or icy condi-
tions are expected, change the rest
position of the windshield wipers from
the retracted position below the hood
to the service position using the wiper
lever. ( P.198)
Selecting tire chains
Regulations on the use of tire
chains
A
B
NOTICE
■Fitting tire chains
The tire pressure warning valves and transmitters may not function correctly when tire chains are fitted.
Windshield wipers

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.