flat tire LEXUS LS500 2019 Owner's Manual

388 6-3. Do-it-yourself maintenance
LS500_OM_(U)_1810 ■
The tire pressure warning system
must be initialized in the following
circumstances:
 When the tire inflation pressure is
changed such as when changing
traveling speed or load weight.
 When the tire inflation pressure is
changed such as when the tire size
is changed.
 When rotating the tires.
 After performing the transmitter ID
code registration procedure.
(  P.389)
When the tire pressure warning system
is initialized, the cu rrent 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, turn
the engine switch off and wait 20
minutes or more.The initialization procedure cannot be
started while the vehicle is moving.
2 Adjust the tire inflation pressure to
the specified cold tire inflation pres-
sure level.Make sure to adjust th e 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 Start the engine.
4 Press or of the meter con-
trol switch to select . 5 Press or to select “Vehicle
Settings” and then press .
6 Press or to select “TPWS”
and then press .
7 Press or to select “Set
Pressure”. Then press and hold
until the tire pressure warning light
blinks 3 times. Then a message will be displayed on the
multi-information display.
“---” will be displayed on the multi-informa-
tion display for the inflation pressure of
each tire while initialization is being per-
formed.
8 Drive straight (with occasional left
and right turns) at approximately
25 mph (40 km/h) or more for
approximately 10 to 30 minutes. Initialization is comple te when the position
of each tire is determ ined and the inflation
pressure of each tire is displayed on the
multi-information display.
Initialization may take longer than normal
to complete if the vehicle speed cannot be
maintained at approx imately 25 mph (40
km/h) or more. If initialization cannot be
completed after driving for 1 hour or more,
park the vehicle in a safe place, turn the
engine switch off and wait 20 minutes or
more before performing the driving proce-
dure again. (  P.389)Initializing the tire pressure
warning system

3896-3. Do-it-yourself maintenance
LS500_OM_(U)_1810 6
Maintenance and care ■
Initialization procedure●
Make sure to perform the initialization
procedure after adjusting the tire inflation
pressure.
Also, make sure the tires are cold before
performing the initialization procedure or
adjusting the tire inflation pressure.●
If the engine switch is turned off during
initialization, it is not necessary to restart
the initialization pr ocedure from the
beginning as it will begin automatically
when the engine switch is turned back to
IGNITION ON mode.●
If initialization has accidentally been
started when it is not necessary, adjust
the tire inflation pres sure to the specified
level when the tires are cold and then
perform the initia lization procedure
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
pressure of a tire drops, the tire pressure
warning light will come on.■
If the tire pressure warning system is not
initialized properly●
In the following situations, initialization
may take longer than usual to be com-
pleted or may not be possible. (Usually,
the vehicle will need to be driven for
approximately 10 to 30 minutes to com-
plete initialization.) If initialization is not
complete after drivin g approximately 30
minutes, continue driving for a while.
• If the vehicle is driven on an unpaved
road, it may take longer to complete ini-
tialization.
• If the vehicle is backed up while perform-
ing initialization, data collected during ini-
tialization will be cleared and it will take
longer than normal to complete.
• If the vehicle is driven in heavy traffic or
another situation where other vehicles
are driven close by, it may take time for
the system to recognize the tire pressure
warning valve and tran smitters of your
vehicle over those of other vehicles.
If initialization is no t complete after driving
for approximately 1 hour, park the vehicle in a safe place for approximately 20 minutes
and then drive the vehicle again. ●
In the following situations, initialization
will not be started or was not completed
properly and the system will not operate
properly. Perform the initialization proce-
dure again.
• If, when attempting to start initialization,
the tire pressure warning light does not
blink 3 times.
• If, when the vehicle has been driven for
about 20 minutes after performing ini-
tialization, the tire pressure warning light
blinks for approximately 1 minute and
then illuminates. ●
If initialization canno t be completed after
performing the above procedure, con-
tact your Lexus dealer.
Every tire pressure warning valve and
transmitter has a unique ID code.
When replacing a tire pressure warn-
ing valve and transmitter, it is necessary
to register the ID codes.
The ID codes can be registered on
of the multi-information display.
1 Park the vehicle in a safe place, turn
the engine switch off, wait 20 min-
utes or more, and then start the
engine. WARNING■
When initializing the tire pressure
warning system
Do not initialize the tire pressure warning
system without first adjusting the tire
inflation pressure to the specified level.
Otherwise, the tire pressure warning
light may not come on even if the tire
inflation pressure is low, or it may come
on when the tire in flation pressure is
actually normal.
Registering ID codes

390 6-3. Do-it-yourself maintenance
LS500_OM_(U)_1810 2 Press or of the meter con-
trol switch to select .
3 Press or to select “Vehicle
Settings” and then press .
4 Press or to select “TPWS”
and then press .
5 Press or to select “Change
Wheel Set”. Then press and hold
until the tire pressure warning
light blinks slowly 3 times.Then a message will be displayed on the
multi-information display.
When registration is being performed, the
tire pressure warning light will blink for
approximately 1 minute then illuminate and
“---” will be displayed for the inflation pres-
sure of each tire on the multi-information
display.
6 Drive straight (with occasional left
and right turns) at approximately
25 mph (40 km/h) or more for
approximately 10 to 30 minutes.Registration is complete when the tire
pressure warning light turns off and the
inflation pressure of each tire is displayed
on the multi-information display.
Registration may take longer than normal
to complete if the vehicle speed cannot be
maintained at approximately 25 mph (40
km/h) or more. If registration cannot be
completed after driving for 1 hour or more, perform the registrati on procedure again
from the beginning. (  P.390)
After registering the ID codes, make sure
to initialize the tire pressure warning sys-
tem. (  P.388)■
When registering ID codes ●
Before performing ID code registration,
make sure that no wheels with tire pres-
sure warning valve and transmitters
installed are near the vehicle. ●
Make sure to initializ e the tire pressure
warning system after registering the ID
codes. If the system is initialized before
registering the ID codes, the initialized
values will be invalid. ●
As the tires will be warm when registra-
tion is completed, ma ke sure to allow the
tires to cool before performing initializa-
tion. ■
Canceling ID code registration ●
To cancel ID code regi stration after it has
been started, turn the engine switch off
before driving the vehicle.
If the vehicle is driven after ID code regis-
tration is started, to cancel registration,
perform the ID code registration start
procedure again and turn the engine
switch off before driving. ●
If ID code registration has been canceled,
the tire pressure warning light will blink
for approximately 1 minute when the
engine switch is tu rned to IGNITION
ON mode and then illuminate. The tire
pressure warning system will be opera-
tional when the tire pressure warning
light turns off.
●
If the warning light does not turn off even
after several minutes have elapsed, ID
code registration may not have been can-
celled correctly. To cancel registration,
perform the ID code registration start
procedure again and then turn the engine
switch off before driving.
■
If ID codes are not registered properly
●
In the following situations, ID code regis-
tration may take longer than usual to be
completed or may not be possible. (Usu-
ally, the vehicle will need to be driven for

3916-3. Do-it-yourself maintenance
LS500_OM_(U)_1810 6
Maintenance and care approximately 10 to 30 minutes to com-
plete ID code registration.)
If ID code registration is not complete
after driving for approximately 30 min-
utes, continue driving for a while.
• If the vehicle is driven on an unpaved
road, it may take longer than normal to
complete registration.
• If the vehicle is backed up while perform-
ing registration, data collected during
registration will be cleared, and it will take
longer than normal to complete.
• If the vehicle is driven in heavy traffic or
another situation where other vehicles
are driven close by, it may take time for
the system to recognize the tire pressure
warning valve and tran smitters of your
vehicle over those of other vehicles.
• If a wheel with a tire pressure warning
valve and transmitter installed is inside or
near the vehicle, registration of the ID
codes for the installed wheels may not be
possible.
If ID registration is not complete after driv-
ing for approximately 1 hour, park the vehi-
cle in a safe place for approximately 20
minutes and then perform the ID code reg-
istration procedure again. ●
In the following situat ions, ID code regis-
tration will not be started or was not com-
pleted properly and the system will not
operate properly. Perform the ID code
registration procedure again.
• If, when attempting to start ID code regis-
tration, the tire pressure warning light
does not blink slowly 3 times.
• If, when the vehicle has been driven for
about 20 minutes after performing ID
code registration, the tire pressure warn-
ing light blinks for approximately 1 minute
and then illuminates.
●
If ID code registration cannot be com-
pleted after performing the above proce-
dure, contact your Lexus dealer.  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 eq uipped 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

392 6-3. Do-it-yourself maintenance
LS500_OM_(U)_1810 1 Chock the tires.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 modulate d 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. ■
Replacing a flat tire for vehicles with
power trunk opener and closer (if
equipped)
In cases such as when replacing tires,
make sure to turn off the trunk opener
main switch (  P.110). Failure to do so
may cause the trunk lid to operate unin-
tentionally if the power trunk opener and
closer switch is accidentally touched,
resulting in hands and fingers being
caught and injured.
Removing a tire
Tire Wheel chock posi-
tions
Front left-hand side Behind the rear
right-hand side tire
Front right-hand
side Behind the rear
left-hand side tire
Rear left-hand side In front of the front
right-hand side tire
Rear right-hand side In front of the front
left-hand side tire

3956-3. Do-it-yourself maintenance
LS500_OM_(U)_1810 6
Maintenance and care The recommended cold tire inflation
pressure and tire size are displayed on
the tire and loading information label.
(  P.452)
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

396 6-3. Do-it-yourself maintenance
LS500_OM_(U)_1810 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 wa rning 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.387)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.

405
LS500_OM_(U)_1810 7 7
When trouble arises When trouble arises .
7-1. Essential information
Emergency flashers.................. 406
If your vehicle has to be stopped in
an emergency .......................... 406
If the vehicle is trapped in rising
water............................................ 407
7-2. Steps to take in an emergency
If your vehicle needs to be towed
........................................................ 409
If you think something is wrong
......................................................... 413
Fuel pump shut off system ...... 414
If a warning light turns on or a
warning buzzer sounds ........ 415
If a warning message is displayed
........................................................ 425
If you have a flat tire.................. 429
If the engine wi ll not start ....... 430
If you lose your keys ................. 432
If the fuel filler door cannot be
opened........................................ 432
If the electronic key does not
operate properly .................... 433
If the vehicle battery is discharged
........................................................ 435
If your vehicle overheats ........ 440
If the vehicle becomes stuck
........................................................ 443

4097-2. Steps to take in an emergency
LS500_OM_(U)_1810 7
When trouble arises 7-2.Steps to take in an emergency
If your vehicle needs to be
towed If towing is ne cessary, we recom-
mend having your vehicle towed by
your Lexus dealer or commercial
towing service, using a wheel-lift
type truck or flatbed truck.
Use a safety chain system for all
towing, and abide by all state/pro-
vincial and local laws. WARNING
Observe the following precautions.
Failure to do so may result in death or
serious injury. ■
When towing the vehicle 
2WD models
Be sure to transport the vehicle with all
four wheels raised off the ground. If the
vehicle is towed with the tires contacting
the ground, the driv etrain and related
parts may be damaged or an accident
may occur due to a change in direction
of the vehicle. 
AWD models
Be sure to transport the vehicle with all
four wheels raised off the ground. If the
vehicle is towed with the tires contacting
the ground, the driv etrain or related
parts may be damaged, the vehicle may
fly off the truck.
■
While towing ●
When towing using cables or chains,
avoid sudden starts, etc. which place
excessive stress on the towing eyelets,
cables or chains. The towing eyelets,
cables or chains may become dam-
aged, broken debris may hit people,
and cause serious damage.
●
Make sure to disable all functions of
the vehicle height control of the elec-
tronically modulated air suspension.
Otherwise, the vehicle height may
change and part of your body may be
caught under the vehicle, possibly
causing injury. (  P.293)
●
Do not turn the engine switch off.
This may lead to an accident as the
rear wheels will be locked by the park-
ing lock.
Also, there is a possibility that the
steering wheel is locked and cannot be
operated.

4137-2. Steps to take in an emergency
LS500_OM_(U)_1810 7
When trouble arises  Fluid leaks under the vehicle.
(Water dripping from the air condi-
tioning after use is normal.)
 Flat-looking tires or uneven tire
wear
 Engine coolant temperature gauge
needle continually points higher
than normal.
 Changes in exhaust sound
 Excessive tire squeal when corner-
ing
 Strange noises related to the sus-
pension system
 Pinging or other noises related to
the engine
 Engine missing, stumbling or run-
ning roughly
 Appreciable loss of power
 Vehicle pulls heavily to one side
when braking  Vehicle pulls heavily to one side
when driving on a level road
 Loss of brake effectiveness, spongy
feeling, pedal almost touches the
floor
If you think something is
wrong If you notice any of the following
symptoms, your vehicle probably
needs adjustment or repair. Con-
tact your Lexus dealer as soon as
possible.
Visible symptoms
Audible symptoms
Operational symptoms