2020 LEXUS LS500H inflation pressure

3996-3. Do-it-yourself maintenance
6
Maintenance and care
The recommended cold tire inflation
pressure and tire size are displayed on
the tire and loading information label.
( P.456)
Tire valve
Tire pressure gauge 1
Remove the tire valve cap.
2 Press the tip of the tire pressure
gauge onto the tire valve.
3 Read the pressure using the gauge
gradations.
4 If the tire inflation pressure is not at
the recommended level, adjust the
pressure.
If you add too much air, press the
center of the valve to deflate.
5 After completing the tire inflation
pressure measurement and adjust-
ment, apply soapy water to the
valve and check for leakage.
6 Put the tire valve cap back on.
■Tire inflation pressure check interval
You should check tire inflation pressure
every two weeks, or at least once a month.
Do not forget to check the spare.
■Effects of incorrect tire inflation pres-
sure
Driving with incorrect ti re 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 drive train
If a tire needs frequent inflating, have it
checked by your Lexus dealer.
■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 mile or 1.5 km, you will get an
accurate cold tire inflation pressure read-
Tire inflation pressure
Checking the specified tire infla-
tion pressure
Inspection and adjustment pro-
cedure
A
B

4006-3. Do-it-yourself maintenance
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.
●Never exceed the vehicle capacity
weight.
Passengers and luggage weight should
be placed so that the vehicle is balanced.
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
your Lexus dealer.
*: 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, the tire
pressure warning valves and transmitters
must be installed. ( P.391)
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, sharp 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.
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.

4237-2. Steps to take in an emergency
7
When trouble arises
*1: This light illuminates on the center panel.
*2: Rear passengers’ seat belt warning buzzer:
The rear passengers’ seat belt warning buzzer sounds to alert the rear passenger that his or
her seat belt is not fastened. If the seat belt is unfastened, the buzzer sounds intermittently
for a certain period of time, af ter the seat belt is fastened and unfastened and the vehicle
reaches a certain speed.
■Tire pressure warning light
■LTA indicator (warning buzzer)
■Intuitive parking assist OFF indicator (warning buzzer)
Warning lightDetails/Actions
When the light comes on after blinking for approximately 1 minute:
Malfunction in the tire pressure warning system
 Have the system checked by your Lexus dealer.
When the light comes on:
Low tire inflation pressure such as
 Natural causes
 Flat tire
 Immediately stop the vehicle in a safe place.
Handling method ( P.426)
Warning lightDetails/Actions
(orange)
Indicates a malfunction in th e LTA (Lane Tracing Assist)
 Follow the instructions displayed on the multi-information display.
(  P.238)
Warning lightDetails/Actions
(flashes)
(if equipped)
Indicates a malfunction in the in tuitive parking assist function
 Have the vehicle inspected by your Lexus dealer immediately.
Indicates that the system is temporarily unavailable, possibly due to a
sensor being dirty or covered with ice, etc.
 Follow the instructions displayed on the multi-information display.
(  P.261)

4277-2. Steps to take in an emergency
7
When trouble arises
pressure warning system. Have the vehicle
inspected by your Lexus dealer immedi-
ately.
If the tire pressure warning light comes
on
1
After the temperature of the tires has
lowered sufficiently, check the inflation
pressure of each tire and adjust them to
the specified level.
2
If the warning light does not turn off
even after several minutes have
elapsed, check that the inflation pres-
sure of each tire is at the specified level
and perform initialization. ( P.392)
■The tire pressure warning light may
come on due to natural causes
The tire pressure warning light may come
on due to natural causes such as natural air
leaks and tire inflation pressure changes
caused by temperature. In this case, adjust-
ing the tire inflation pressure will turn off the
warning light (after a few minutes).
■Conditions that the tire pressure warn-
ing system may not function properly
 P.390
WARNING
■If both the ABS and the brake system
warning lights remain on
Stop your vehicle in a safe place immedi-
ately and contact your Lexus dealer.
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 steering 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 precau-
tions.
Failure to do so could cause a loss of
vehicle control and result in death or
serious injury.
●Decelerate to the lowest appropriate
speed as soon as possible. Do not
drive over 50 mph (80 km/h).
●Check and adjust the tire inflation
pressure immediately.
●If the tire pressure warning light comes
on even after tire inflation pressure
adjustment, it is prob able that you have
a flat tire. Have the flat tire replaced by
the nearest Lexus dealer.
●Avoid abrupt maneuvering and brak-
ing.
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.
■Maintenance of the tires
Each tire, including the spare (if pro-
vided), should be checked monthly when
cold and inflated to the inflation pressure
recommended by the vehicle manufac-
turer on the vehicle placard or tire infla-
tion pressure label (tire and load
information label). (If your vehicle has
tires of a different size than the size indi-
cated on the vehicle placard or tire infla-
tion pressure label [tire and load
information label], you should determine
the proper tire inflation pressure for
those tires.)

4287-2. Steps to take in an emergency
WARNING
As an added safety feature, your vehicle
has been equipped with a tire pressure
monitoring system (TPMS-tire pressure
warning system) that illuminates a low
tire pressure telltale (tire pressure warn-
ing light) when one or more of your tires
is significantly under-inflated. Accord-
ingly, when the low tire pressure telltale
(tire pressure warnin g light) illuminates,
you should stop and check your tires as
soon as possible, and inflate them to the
proper pressure. Driving on a signifi-
cantly under-inflated tire causes the tire
to overheat and can lead to tire failure.
Under-inflation also reduces fuel effi-
ciency and tire tread life, and may affect
the vehicle’s handling and stopping abil-
ity.
Please note that the TPMS (tire pressure
warning system) is not a substitute for
proper tire maintenance, and it is the
driver’s responsibility to maintain correct
tire pressure, even if under-inflation has
not reached the level to trigger illumina-
tion of the TPMS low tire pressure telltale
(tire pressure warning light).
Your vehicle has also been equipped with
a TPMS (tire pressure warning system)
malfunction indicator to indicate when
the system is not operating properly. The
TPMS (tire pressure warning system)
malfunction indicator is combined with
the low tire pressure telltale (tire pres-
sure warning light). When the system
detects a malfunction, the telltale will
flash for approximately one minute and
then remain continuously illuminated.
This sequence will continue upon subse-
quent vehicle start-ups as long as the
malfunction exists. When the malfunction
indicator is illuminated, the system may
not be able to detect or signal low tire
pressure as intended.TPMS (tire pressure warning system)
malfunctions may occur for a variety of
reasons, including the installation of
replacement or alternate tires or wheels
on the vehicle that prevent the TPMS
(tire pressure warning system) from func-
tioning properly. Always check the
TPMS (tire pressure warning system)
malfunction telltale after replacing one
or more tires or wheels on your vehicle to
ensure that the replacement or alternate
tires and wheels allow the TPMS (tire
pressure warning system) to continue to
function properly.
NOTICE
■To ensure the tire pressure warning
system operates properly
Do not install tires with different specifi-
cations or makers, as the tire pressure
warning system may not operate prop-
erly.

4568-1. Specifications
warning light is illuminated, refer to P.419.)
*2: Make sure to confirm that the brake warning light (yellow) does not illuminate. (If the brake warning light illuminates, refer to P.419.)
*3: Vehicles without Lexus Safety System + A
*4: Vehicles with Lexus Safety System + A
19-inch tires (type A)
19-inch tires (type B)
Steering
Free playLess than 1.2 in. (30 mm)
Tires and wheels
Tire size245/50RF19 101W
Tire inflation pressure
(Recommended cold tire
inflation pressure)
Driving under normal conditions
Front: 36 psi (250 kPa, 2.5 kgf/cm
2 or bar)
Rear: 36 psi (250 kPa, 2.5 kgf/cm
2 or bar)
Driving at high speeds above 118 mph (190 km/h) (in coun-
tries where such speeds are permitted by law)
Add 9 psi (60 kPa, 0.6 kgf/cm
2 or bar) to the front tires and
rear tires. Never exceed the maximum cold tire inflation
pressure indicated on the tire sidewall.
Wheel size19  8J
Wheel nut torque103 ft•lbf (140 N•m, 14.3 kgf•m)
Tire size245/50RF19 101V
Tire inflation pressure
(Recommended cold tire
inflation pressure)
Driving under normal conditions
Front: 36 psi (250 kPa, 2.5 kgf/cm
2 or bar)
Rear: 36 psi (250 kPa, 2.5 kgf/cm
2 or bar)
Driving at high speeds above 100 mph (160 km/h) (in
countries where such speeds are permitted by law)
Add 9 psi (60 kPa, 0.6 kgf/cm
2 or bar) to the front tires and
rear tires. Never exceed the maximum cold tire inflation
pressure indicated on the tire sidewall.

4578-1. Specifications
8
Vehicle specifications
20-inch tires (type A)
20-inch tires (type B)
Wheel size19  8J
Wheel nut torque103 ft•lbf (140 N•m, 14.3 kgf•m)
Tire size245/45RF20 99Y
Tire inflation pressure
(Recommended cold tire
inflation pressure)
Driving under normal conditions
Front: 35 psi (240 kPa, 2.4 kgf/cm
2 or bar)
Rear: 35 psi (240 kPa, 2.4 kgf/cm
2 or bar)
Driving at high speeds above 137 mph (220 km/h) (in
countries where such speeds are permitted by law)
Add 9 psi (60 kPa, 0.6 kgf/cm
2 or bar) to the front tires and
rear tires. Never exceed the maximum cold tire inflation
pressure indicated on the tire sidewall.
Wheel size20  8 1/2J
Wheel nut torque103 ft•lbf (140 N•m, 14.3 kgf•m)
Tire sizeFront tires: 245/45RF20 99Y
Rear tires: 275/40RF20 102Y
Tire inflation pressure
(Recommended cold tire
inflation pressure)
Driving under normal conditions
Front: 36 psi (250 kPa, 2.5 kgf/cm
2 or bar)
Rear: 36 psi (250 kPa, 2.5 kgf/cm
2 or bar)
Driving at high speeds above 137 mph (220 km/h) (in
countries where such speeds are permitted by law)
Add 9 psi (60 kPa, 0.6 kgf/cm
2 or bar) to the front tires and
rear tires. Never exceed the maximum cold tire inflation
pressure indicated on the tire sidewall.
Wheel sizeFront wheels: 20  8 1/2J
Rear wheels: 20  9 1/2J
Wheel nut torque103 ft•lbf (140 N•m, 14.3 kgf•m)

4588-1. Specifications
20-inch tires (type C)
20-inch tires (type D)
Tire size245/45RF20 99V
Tire inflation pressure
(Recommended cold tire
inflation pressure)
Driving under normal conditions
Front: 35 psi (240 kPa, 2.4 kgf/cm
2 or bar)
Rear: 35 psi (240 kPa, 2.4 kgf/cm
2 or bar)
Driving at high speeds above 100 mph (160 km/h) (in
countries where such speeds are permitted by law)
Add 9 psi (60 kPa, 0.6 kgf/cm
2 or bar) to the front tires and
rear tires. Never exceed the maximum cold tire inflation
pressure indicated on the tire sidewall.
Wheel size20  8 1/2J
Wheel nut torque103 ft•lbf (140 N•m, 14.3 kgf•m)
Tire sizeFront tires: 245/45RF20 99V
Rear tires: 275/40RF20 102V
Tire inflation pressure
(Recommended cold tire
inflation pressure)
Driving under normal conditions
Front: 36 psi (250 kPa, 2.5 kgf/cm
2 or bar)
Rear: 36 psi (250 kPa, 2.5 kgf/cm
2 or bar)
Driving at high speeds above 100 mph (160 km/h) (in
countries where such speeds are permitted by law)
Add 9 psi (60 kPa, 0.6 kgf/cm
2 or bar) to the front tires and
rear tires. Never exceed the maximum cold tire inflation
pressure indicated on the tire sidewall.
Wheel sizeFront wheels: 20  8 1/2J
Rear wheels: 20  9 1/2J
Wheel nut torque103 ft•lbf (140 N•m, 14.3 kgf•m)