tire pressure lexus LC500 2018 Owner's Guide

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6-3. Do-it-yourself maintenance
Maintenance and care
When replacing tires or wheels, tire
pressure warning valves and transmit-
ters must also be installed.
When new tire pressure warning
valves and transmitters are installed,
new ID codes must be registered in the
tire pressure warning computer and
the tire pressure warning system must
be initialized. ( P.337)
■When replacing the tires and wheels
If the ID code of the tire pressure warning valve and transmitter is not registered, the tire pressure warning system will not work
properly. After driving for about 10 minutes, the tire pressure warning light blinks for 1 minute and stays on to indicate a system
malfunction.
■The tire pressure warning system
must be initialized in the following
circumstances:
 When rotating the tires.
 When the tire inflation pressure is
changed when changing traveling
speed.
 When the tire inflation pressure is
changed such as when changing tire
size. (When there are multiple spec-
ified pressures)
 After registering the ID codes.
( P.337)
When the tire pressure warning system
is initialized, the current tire inflation
pressure is set as the benchmark pres-
sure.
■How to initialize the tire pressure
warning system
1 Park the vehicle in a safe place and
turn the engine switch switch> off.
Initialization cannot be performed while the vehicle is moving.
2 Adjust the tire inflation pressure to
the specified cold tire inflation pres-
sure level.
Make sure to adjust the tire pressure to the specified cold tire infl ation pressure level. The tire pressure warning system will oper-
ate based on this pressure level.
3 Turn the engine switch switch> to IGNITION ON mode
.
Installing tire pressure warning
valves and tr ansmitters
NOTICE
■Repairing or replacing tires, wheels, tire pressure warning valves, trans-
mitters and tire valve caps
●When removing or fitting the wheels,
tires or the tire pressure warning valves and transmitters, contact any
authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer as the tire pressure warning
valves and transmitters may be dam- aged if not handled correctly.
●Make sure to install the tire valve caps. If the tire valve caps are not installed,
water could enter the tire pressure warning valves and the tire pressure warning valves could be bound.
●When replacing tire valve caps, do not
use tire valve caps other than those specified. The cap may become stuck.
Initializing the tire pressure
warning system

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6-3. Do-it-yourself maintenance
4Press or of the meter con-
trol switches and select .
5 Press or of the meter con-
trol switches and select “Vehicle
Settings”, and then press “OK”.
6 Press or of the meter con-
trol switches and select “TPWS
SET”, and then press “OK”.
7 Press or of the meter con-
trol switches and select “Set tire
pressure”, and then press and hold
“OK” until the tire pressure warning
light starts blinking.
A message is displayed on the multi-infor- mation display. Also, “--” is displayed for inflation pressure of each tire on the multi-
information display while the tire pressure warning system determines the position.
8 Drive the vehicle at approximately
40 km/h (25mph) or more for
approximately 10 to 30 minutes.
When initialization is complete, the infla- tion pressure of each tire will be displayed on the multi-information display.
Depending on the vehicle and driving con- ditions, initialization may take up to
approximately 1 hour to complete.
■The initialization operation
●Make sure to carry out initialization after
adjusting the tire inflation pressure. Also, make sure the tires are cold before carrying out initialization or tire inflation
pressure adjustment.
●If you have accidentally turned the engine
switch off during initial- ization, it is not ne cessary to manually restart the initializatio n again, as initializa-
tion will restart automatically the next time the engine switch is turned to IGNITION ON mode mode>.
●If you accidentally perform initialization
when initialization is not necessary, adjust the tire inflation pressure to the specified level when the tires are cold, and conduct
initialization again.
●While the position of each tire is being
determined and the inflation pressures are not being displayed on the multi-information display, if the inflation pres-
sure of a tire drops, the tire pressure warning light will come on.
■When initialization of the tire pressure warning system has failed
Initialization may take longer to complete if
the vehicle is driven on an unpaved road. When performing initialization, drive on a paved road if possible. Depending on the
driving environment an d condition of the tires, initialization will be completed in approximately 10 to 30 minutes. If initializa-
tion is not complete after driving approxi- mately 10 to 30 minutes, continue driving for a while. If the inflation of each tire is not
displayed after driving for approximately 1 hour, perform the following procedure.
●Park the vehicle in a safe place for approximately 20 minutes. Then drive straight (with occasional left and right
turns) at approximately 40 km/h (25 mph) or more for approximately 10 to 30 minutes.
However, in the following situations, the tire
inflation pressure will not be recorded and
the system will not operate properly. Per-
form initialization again.
●When performing init ialization, the tire

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6-3. Do-it-yourself maintenance
Maintenance and care
pressure warning light does not blink 3 times. (Initialization will not occur while driving)
●After performing init ialization, the tire pressure warning light blinks for 1 minute
then stays on after driving for about 20 minutes.
If the inflation pressure of each tire is still not
displayed, have the vehicle inspected by
any authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer.
■When registering ID codes
●Initialize the tire pressure warning system after ID code registra tion. Initialization is
disabled if the system was initialized before registration.
●After ID code registration, the tires are hot by driving. Initia lize the tire pressure warning system after the tires become
cold.
The tire pressure warning valve and
transmitter is equipped with a unique
ID code. When replacing a tire pres-
sure warning valve and transmitter, it is
necessary to register the ID code.
When registering the ID codes, per-
form the following procedure.
1 Turn the engine switch switch> to IGNITION ON mode
.
2 Press or of the meter con-
trol switches and select .
3 Press or of the meter con-
trol switches and select “Vehicle
Settings”, and then press “OK”.
4 Press or of the meter con-
trol switches and select “TPWS
SET”, and then press “OK”.
5 Press or of the meter con-
trol switches and select “Change
wheel set”, and then press and hold
“OK” until the tire pressure warning
light starts blinking.
The change wheel set mode is activated and registration is started.
A message is displayed on the multi-infor- mation display, and “--” is displayed for inflation pressure of e ach tire. Then, the tire
pressure warning light blinks rapidly for approximately 1 minute and stays on.
6 Drive the vehicle at 40 km/h
(25mph) or more for approxi-
mately 10 to 30 minutes.
When registration is completed, the tire pressure warning light will go off and the inflation pressure of each tire will be dis-
played on the multi-information display.
WARNING
■When initializing the tire pressure
warning system
Do not initialize tire inflation pressure
without first adjusting the tire inflation pressure to the specified level. Other-wise, the tire pressure warning light may
not come on even if the tire inflation pres- sure is low, or it may come on when the tire inflation pressure is actually normal.
Registering ID codes

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6-3. Do-it-yourself maintenance
The time elapsed before registration is completed differs according to the driving condition and environment.
■Canceling the change wheel set mode
●If turning the engine switch off when in the change wheel set
mode before driving, the change wheel set mode is canceled.
●After driving when in the change wheel set mode, the change wheel set mode cannot be canceled. To cancel the mode,
perform the procedure for ID code regis- tration again and turn the engine switch off before driving.
●If the change wheel set mode is canceled, the ID codes that have already been reg-
istered are communicated. When com- munication is finished, the tire pressure warning light will turn off.
■When ID code registration may not
operate properly
●Do not move the vehicle backward
during registration. Registration is started again from the beginning and it may take longer than usual.
●When another vehicle is running the side of the vehicle such as in heavy traffic, it
may take longer to detect the vehicle’s tire pressure warning valves and trans-mitters.
●If tire pressure warning valves and trans-mitters are in the vehicle, the ID codes
may not be registered.
If registration takes long time, perform the
procedure for ID code registration again
after parking the vehicle for 20 minutes.
If the ID codes cannot be registered even
when performing the above procedure,
contact any authorized Lexus retailer or
Lexus authorized repairer, or any reliable
repairer.

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6-3. Do-it-yourself maintenance
WARNING
■When installing the tire
Failure to follow these precautions could cause the wheel nuts to loosen and the tire to fall off, resulting in death or serious
injury.
●Never use oil or grease on the wheel bolts or wheel nuts.Oil and grease may cause the wheel
nuts to be excessively tightened, lead- ing to bolt or disc wheel damage. In addition, the oil or grease can cause
the wheel nuts to loosen and the wheel may fall off, causing a serious accident. Remove any oil or grease from the
wheel bolts or wheel nuts.
●Have the wheel nuts tightened with a torque wrench to 140 N•m (14.3 kgf•m, 103.3 ft•lbf) as soon as possible
after changing wheels.
●Do not attach a heavily damaged wheel ornament, as it may fly off the wheel while the vehicle is moving.
●When installing a ti re, only use wheel
nuts that have been specifically designed for that wheel.
●If there are any cracks or deformations in the bolt screws, nut threads or bolt
holes of the wheel, have the vehicle inspected by any authorized Lexus retailer or Lexus authorized repairer,
or any reliable repairer.
■After using the tools and jack
Before driving, make sure all the tools and jack are stored securely in place. Failure to do so may cause injury in case
of a collision or sudden braking.
NOTICE
■Repairing or replacing tires, wheels, tire pressure warning valves, trans-mitters and tire valve caps
 P.335

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6-3. Do-it-yourself maintenance
Maintenance and care
■Effects of incorrect tire inflation pres- sure
Driving with incorrect tire inflation pressure may result in the following:
●Reduced fuel economy
●Reduced driving comfort and poor han-dling
●Reduced tire life due to wear
●Reduced safety
●Damage to the drivetrain
If a tire needs frequent inflating, have it checked by any authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer.
■Instructions for checking tire inflation pressure
When checking tire inflation pressure, observe the following:
●Check only when the tires are cold.If your vehicle has been parked for at least 3 hours or has not been driven for
more than 1.5 km or 1 mile, you will get an accurate cold tire inflation pressure read-ing.
●Always use a tire pressure gauge.It is difficult to judge if a tire is properly
inflated based only on its appearance.
●It is normal for the tire inflation pressure
to be higher after driving as heat is gen- erated in the tire. Do not reduce tire infla-tion pressure after driving.
●Passengers and luggage weight should be placed so that the vehicle is balanced.
Tire inflation pressure
Make sure to maintain proper tire
inflation pressure. Tire inflation
pressure should be checked at least
once per month. However, Lexus
recommends that tire inflation
pressure be checked once every
two weeks.
WARNING
■Proper inflation is critical to save tire performance
Keep your tires properly inflated. If the tires are not properly inflated, the following conditions may occur which
could lead to an accident resulting in death or serious injury:
●Excessive wear
●Uneven wear
●Poor handling
●Possibility of blowouts resulting from overheated tires
●Air leaking from between tire and
wheel
●Wheel deformation and/or tire dam- age
●Greater possibility of tire damage while driving (due to road hazards,
expansion joints, sh arp edges in the road, etc.)
NOTICE
■When inspecting and adjusting tire inflation pressure
Be sure to put the tire valve caps back on. If a valve cap is not installed, dirt or mois-
ture may get into the valve and cause an air leak, resulting in decreased tire infla-tion pressure.

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6-3. Do-it-yourself maintenance
When replacing wheels, care should
be taken to ensure that they are equiv-
alent to those removed in load capac-
ity, diameter, rim width and inset*.
Replacement wheels are available at
any authorized Lexus retailer or Lexus
authorized repairer, or any reliable
repairer.
*: Conventionally referred to as offset.
Lexus does not recommend using the
following:
 Wheels of different sizes or types
 Used wheels
 Bent wheels that have been straight-
ened
■When replacing wheels
The wheels of your vehicle are equipped with tire pressure warning valves and trans-
mitters that allow the tire pressure warning system to provide advance warning in the event of a loss in tire inflation pressure.
Whenever wheels are replaced, tire pres- sure warning valves and transmitters must be installed. ( P.335)Use only Lexus wheel nuts and
wrenches designed for use with
your aluminum wheels.
 When rotating, repairing or chang-
Wheels
If a wheel is bent, cracked or heavily
corroded, it should be replaced.
Otherwise, the tire may separate
from the wheel or cause a loss of
handling control.
Wheel selection
WARNING
■When replacing wheels
●Do not use wheels that are a different
size from those recommended in the Owner’s Manual, as this may result in a loss of handling control.
●Never use an inner tube in a leaking
wheel which is designed for a tubeless tire. Doing so may result in an acci-dent, causing death or serious injury.
■Use of defective wheels prohibited
Do not use cracked or deformed wheels.
Doing so could cause the tire to leak air during driving, possibly causing an acci-dent.
NOTICE
■Replacing tire pressure warning
valves and transmitters
●Because tire repair or replacement
may affect the tire pressure warning valves and transmitters, make sure to have tires serviced by any authorized
Lexus retailer or Lexus authorized repairer, or any reliable repairer or other qualified service shop. In addi-
tion, make sure to purchase your tire pressure warning valves and transmit-ters at any authorized Lexus retailer or
Lexus authorized repairer, or any reli- able repairer.
●Ensure that only genuine Lexus wheels are used on your vehicle.
Tire pressure warning valves and trans- mitters may not work properly with non-genuine wheels.
Aluminum wheel precautions

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7-2. Steps to take in an emergency
a different tone for 90 more seconds.
■Rear passengers’ seat belt reminder lights (warning buzzer*1)*2
*1: Rear passenger’s seat belt warning buzzer:
The seat belt warning buzzer sounds to alert th e rear passengers that his or her seat belt is
not fastened. The buzzer sounds for 30 second s after the vehicle reaches a speed of 20
km/h (12 mph). Then, if the seat belt is still unfastened, the buzzer will sound in a different
tone for 90 more seconds.
*2: This light illuminates on the center panel.
■Master warning light (warning buzzer)
■Tire pressure warning light
Warning
lightWarning light/Details/Actions
Warns the rear passengers to fasten their seat belts
 Fasten the seat belt.
Warning
lightWarning light/Details/Actions
A buzzer sounds and the warning light comes on and flashes to indicate that
the master warning system has detected a malfunction.
 P.378
Warning
lightWarning light/Details/Actions
When the light comes on:
Low tire inflation pressure such as
 Natural causes (P.375)
 Flat tire (P.384)
 Adjust the tire inflation pressure to the specified level.
The light will turn off after a few minu tes. In case the light does not turn
off even if the tire inflation pressure is adjusted, have the system
checked by any authorized Lexus reta iler or Lexus authorized repairer,
or any reliable repairer.
When the light comes on after blinking for 1 minute:
Malfunction in the tire pressure warning system
 Have the system checked by any authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer.

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7-2. Steps to take in an emergency
When trouble arises
■High coolant temperature warning light (warning buzzer)*
*: This light illuminates on the multi-information display.
■Front passenger detection sensor, seat belt reminder and warning buzzer
●If luggage is placed on a front passenger seat, the front passenger detection sensor may cause the warning light to flash and the warning buzzer to sound even if a passenger is not
sitting in the seat.
●If a cushion is placed on the seat, the sensor may not detect a passenger, and the warning
light may not operate properly.
■If the malfunction indicator lamp comes on while driving
The malfunction indicator lamp w ill come on if the fuel tank becomes completely empty. If
the fuel tank is empty, refuel the vehicle immediately. The malfunction indicator lamp will go off after several trips.
If the malfunction indicator lamp does not go off, contact any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer as soon as possible.
■Electric power steering system warning light (warning buzzer)
When the 12-volt battery charge becomes insufficient or the voltage temporarily drops, the electric power steering system warning lig ht may come on and the warning buzzer may sound.
■Tire pressure warning light
When a malfunction occurs in the tire pressure warning system, the tire pressure warning light blinks to warn the driver. However, if the warning light blinks for 1 minute, and then
remains illuminated, maki ng it difficult to determine whether the warning light is blinking, turn the engine switch fr om off to IGNITION ON mode and check if the warning light blinks.
■When the tire pressure warning light comes on
Carry out the following procedure after the tire temperature has lowered sufficiently.
●Check the tire inflation pressure and adjust to the appropriate level.
●If the warning light does not go out even after several minutes, check that the tire inflation
pressure is at the specified level and carry out initialization. ( P.335)
The warning light may come on again if the above operations are conducted without first
allowing the tire temperature to lower sufficiently.
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on du e to natural causes such as natural air leaks
and tire inflation pressure changes caused by temperature. In this case, adjusting the tire inflation pressure will turn off the warning light (after a few minutes).
Warning
lightWarning light/Details/Actions
Indicates that the engine coolant temperature increases
 Stop and check. (P.400, 403)

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7-2. Steps to take in an emergency
■Conditions that the tire pressure warning system may not function properly
 P.330
■If the tire pressure warning light frequently comes on after blinking for 1 minute
If the tire pressure warning lig ht frequently comes on after blinking for 1 minute when the engine switch is turned to IGNITION ON mode , have it
checked by any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer.
■Warning buzzer
In some cases, the buzzer may not be heard due to being in a noisy location or audio sound.
WARNING
■If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact any authorized Lexus retailer
or Lexus authorized repairer, or any reliabl e repairer. The vehicle will become extremely unstable during braking, and the ABS system may fail, which could cause an accident resulting in death or serious injury.
■When the electric power steering system warning light comes on
When the light comes on yellow, the assist to the power steering is restricted. When the
light comes on red, the assist to the power st eering is lost and handling operations of the steering wheel become extremely heavy. When steering wheel operations are heavier than usual, grip the steering wheel firmly and operate it using more force than usual.
■If the tire pressure warning light comes on
Be sure to observe the following precautions. Failure to do so could cause a loss of vehi-
cle control and result in death or serious injury.
●Decelerate to the lowest appropriate speed as soon as possible. Do not drive over 80 km/h (50 mph).
●Check and adjust the tire inflation pressure immediately.
●If the tire pressure warning light comes on ev en after tire inflation pressure adjustment, it is probable that you have a flat tire. Have the flat tire replaced by nearest authorized
Lexus retailer or Lexus authorized repairer, or any reliable repairer.
●Avoid abrupt maneuvering and braking. If the vehicle tires deteriorate, you could lose control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.