Lexus NX450H+ (2022 year). Manual in english - page 37

INFORMATION

■

If the tire inflation pressure cannot be set easily

●

If the tire pressure warning light does not blink 3 times when starting the tire
inflation pressure setting procedure, the procedure may not have started. Perform
the procedure again from the beginning.

●

If tire inflation pressure setting procedure cannot be completed after performing
the above procedure, contact your Lexus dealer.

Setting using the current tire inflation pressure

WARNING

Make sure to adjust the tire inflation pressure of each tire to the appropriate level before
performing tire pressure setting. Otherwise, the tire pressure warning light may not
illuminate even if the tire inflation pressure drops or may illuminate even though the tire
inflation pressure is normal.

INFORMATION

■

Warning performance of the tire pressure warning system

●

When performing the tire pressure setting using the current tire inflation pressure,
the warning timing of the tire pressure warning system will vary according to the
conditions under which tire pressure setting was performed. Therefore, a warning may
be output even if the tire inflation pressure drops slightly or if the tire inflation pressure
increases above that when the tire inflation pressure was set.

●

Make sure to perform the tire pressure setting procedure after adjusting the tire
inflation pressure. Also, make sure the tires are cold before performing the tire
pressure setting procedure or adjusting the tire inflation pressure.

1

Adjust the tire inflation pressure of each tire to the appropriate level.

Make sure to adjust the tire inflation pressure with the tires cold.

2

Start the hybrid system.

The tire inflation pressure cannot be set while the vehicle is moving.

3

Select 

 on the center display.

4

Select [Vehicle customize].

5

Select [Tire pressure].

6

Select [Set current air pressure].

8-5. Tire maintenance

608

7

Select [Continue].

The tire pressure warning light will slowly blink 3
times and a message indicating that tire inflation
pressure is being set will be displayed on the mul-
ti-information display.
After setting the tire inflation pressure, a message
indicating that setting has been completed will be
displayed on the multi-information display.

INFORMATION

■

Tire inflation pressure setting procedure

●

If the power switch is turned off while setting the tire inflation pressure, the next
time the power switch is turned to ON, the setting procedure will resume and it
will not be necessary to restart the procedure.

●

If the tire inflation pressure setting procedure is started unnecessarily, adjust the
tire inflation pressure to the specified level with the tires cold and then perform
setting by selecting a specified tire inflation pressure, or perform the tire inflation
pressure setting procedure with the current tire inflation pressure.

■

If the tire inflation pressure cannot be set easily

●

Normally, the tire inflation pressure setting procedure can be completed in 2 or 3
minutes.

●

If the tire pressure warning light does not blink 3 times when starting the tire
inflation pressure setting procedure, the procedure may not have started. Perform
the procedure again from the beginning.

●

If tire inflation pressure setting procedure cannot be completed after performing
the above procedure, contact your Lexus dealer.

Registering ID codes

The tire pressure warning valve and transmitter is equipped with a unique ID code.
When new tire pressure warning valves and transmitters are installed, new ID
codes must be registered in the tire pressure warning computer.

INFORMATION

●

ID codes can be registered by yourself, but depending on the driving conditions and
driving environment, registration may take some time to complete.

●

When using a wheel set which all of the ID codes have already been registered, the
wheel set can be changed in a short amount of time.

8-5. Tire maintenance

609

8

Maintenance and car

e

Before performing ID code registration, make sure that no wheels with tire pres-
sure warning valve and transmitters installed are near the vehicle.

1

Park the vehicle in a safe place, turn the power switch off and wait 15 minutes or
more.

2

Start the hybrid system.

The ID code registration procedure cannot be performed while the vehicle is moving.

3

Select 

 on the center display.

4

Select [Vehicle customize].

5

Select [Tire pressure].

6

Check if the desired wheel set ([Set 1] or [Set
2]) is displayed.

ID codes will be registered to the displayed wheel
set.
To change the wheel set to be registered, select
the displayed set, and then select the wheel set
you wish to register.
If ID codes have already been registered for that
wheel set, the tire pressure warning light will slowly blink 3 times, and a message
indicating that change is occurring will be displayed on the multi-information display.

7

Select [New tire registration].

8

Select [Continue].

The tire pressure warning light will slowly blink 3
times and a message indicating that ID code reg-
istration is being performed will be displayed on
the multi-information display. Wheel set changing
will be canceled and registration will begin.
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 pressure of each tire
on the multi-information display.

INFORMATION

If the tire pressure warning light does not blink 3 times when starting ID code
registration procedure, the procedure may not have started. Perform the procedure
again from the beginning.

9

Drive straight (with occasional left and right turns) at approximately 25 mph
(40 km/h) or more for approximately 10 to 30 minutes.

8-5. Tire maintenance

610

When registration is complete, the tire pressure warning light will turn off and a
message indicating that registration has been completed will be 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 registration procedure again
from the beginning.

INFORMATION

■

When registering ID codes

●

Normally, wheel position registration can be completed within approximately 30
minutes.

●

ID code registration is performed while driving at a vehicle speed of approximate-
ly 25 mph (40 km/h) or more.

■

If ID codes are not registered easily

●

In the following situations, ID code registration may take longer than usual to be
completed or may not be possible.

•

When the vehicle has not been parked for approximately 15 minutes or more
before being driven

•

Vehicle is not driven at approximately 25 mph (40 km/h) or more

•

Vehicle is driven on unpaved roads

•

Vehicle is driven near other vehicles and system cannot recognize tire pressure
warning valve and transmitters of your vehicle over those of other vehicles

•

Wheel with tire pressure warning valve and transmitter installed is inside or
near the vehicle

●

If the vehicle is reversed during registration, all data collected until then will be
cleared. Perform driving again.

●

If registration does not complete after driving for 1 hour or more, perform the ID
code registration procedure again from the beginning.

●

If the ID codes cannot be registered even when performing the above procedure,
contact your Lexus dealer.

10

If the tire inflation pressure of the wheel set installed differs from that of the
previous set, it will be necessary to perform the tire inflation pressure setting
procedure of the tire pressure warning system.

If the specified tire inflation pressure is the same, it will not be necessary to perform the
tire inflation pressure setting procedure.

8-5. Tire maintenance

611

8

Maintenance and car

e

 Related Links 

Setting the tire pressure(P. 607)

Canceling ID code registration

To cancel ID code registration after it has been started, select [New tire registra-
tion] again on the center display.

If ID code registration has been canceled, the tire pressure warning light will turn off.
If the warning light does not turn off, ID code registration may not have been cancelled
correctly. To cancel registration, select [New tire registration] again on the center display.

Selecting wheel set

Your vehicle is equipped with a tire pressure warning system with a function to
register two sets of ID codes. This allows for registration of a second wheel set, for
example a winter set.

●

The wheel set can be changed only if a second wheel set has been registered to
the system. If a second wheel set has not been registered, "Set 2(Unregistered)"
will be displayed and it will not be possible to change to the selected wheel set.
ID codes can be registered by yourself.

●

Only a change between both registered wheel set is possible, mixing between
these wheel sets is not supported.

●

While registering ID codes, it may not be possible to change between wheel
sets normally. Cancel registration before changing between wheel sets.

1

Install the desired wheel set.

2

Select 

 on the center display.

3

Select [Vehicle customize].

4

Select [Tire pressure].

5

Select the wheel set ([Set 1] or [Set 2]) displayed for the set selection setting.

6

Select the wheel set you wish to register, and then select [OK].

The tire pressure warning light will slowly blink 3 times, a message indicating that
change is occurring will be displayed, and the wheel set change will begin.
Wheel set change will begin and the tire pressure warning light will blink for 1 minute
and then illuminate. Also, while the change is being performed, "---" will be displayed
for the tire inflation pressure of each tire on the multi-information display.

8-5. Tire maintenance

612

After approximately 2 minutes, the wheel set
change will complete, the tire pressure warning
light will turn off, and a completion message will
be displayed on the multi-information display.
If changing does not complete after approximate-
ly 4 minutes, a message indicating that the change
could not be completed will be displayed.
Check which wheel set is installed and perform
the change procedure again from the beginning.

7

If the specified tire inflation pressure of the wheel set installed differs from that
of the previous set, it will be necessary to perform the tire inflation pressure
setting procedure of the tire pressure warning system.

If the specified tire inflation pressure is the same, it will not be necessary to perform the
tire inflation pressure setting procedure.

8

Register the position of each wheel.

 Related Links 

Registration of the position of each wheel after performing a tire rotation(P. 605)

8-5. Tire maintenance

613

8

Maintenance and car

e

Checking tire inflation pressure

You should check tire inflation pressure every two weeks, or at least once a
month.Do not forget to check the spare.

WARNING

In order to ensure the performance of the tires, maintain proper tire inflation pressure.
If the tires are not properly inflated, the following may occur:

●

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 damage

●

Greater possibility of tire damage while driving (due to road hazards, expansion joints,
sharp edges in the road, etc.)

NOTICE

After inspecting and adjusting tire inflation pressure, make sure to install the tire valve
caps.
If a valve cap is not installed, dirt or moisture may get into the valve and cause an air leak,
resulting in decreased tire inflation pressure.

Driving with incorrect tire inflation pressure may result in the following:

●

Reduced fuel economy

●

Reduced driving comfort and poor handling

●

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
reading.

8-5. Tire maintenance

614

●

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
generated in the tire. Do not reduce tire inflation pressure after driving.

●

Never exceed the vehicle capacity weight.
Passengers and luggage weight should be placed so that the vehicle is balanced.

Checking the specified tire inflation pressure

The recommended cold tire inflation pressure
and tire size are displayed on the tire and loading
information label.

Tire inflation pressure inspection and adjustment procedure

 

A

Tire valve

B

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 recom-
mended 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 adjustment, apply
soapy water to the valve and check for leakage.

6

Put the tire valve cap back on.

8-5. Tire maintenance

615

8

Maintenance and car

e

Lifting the vehicle with a floor jack

When using a floor jack, follow the instructions in the manual provided with the
jack and perform the operation safely.When raising your vehicle with a floor jack,
position the jack correctly.Improper placement may damage your vehicle or cause
injury.

Front jack point position

Rear jack point position

8-5. Tire maintenance

616

Rotating the tires

To equalize tire wear and extend tire life, Lexus recommends that tire rotation be
performed at the same interval as tire inspection.
Rotate the tires as shown in the illustration.
Make sure to perform wheel position registration procedure after rotating the tires.

 

A

Front

 Related Links 

Registration of the position of each wheel after performing a tire rotation(P. 605)

8-5. Tire maintenance

617

8

Maintenance and car

e

Wheels

If a wheel is bent, cracked or heavily corroded, it should be replaced. Otherwise,
the tire may separate from the wheel, causing a loss of handling control.

Wheel selection

When replacing wheels, care should be taken to ensure that they are equivalent to
those removed in load capacity, diameter, rim width and inset

*1

.

Replacement wheels are available at your Lexus dealer.
Lexus does not recommend using the following:

●

Wheels of different sizes or types

●

Used wheels

●

Bent wheels that have been straightened

INFORMATION

■

When replacing wheels

The wheels of your vehicle are equipped with tire pressure warning valves and transmit-
ters 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 pressure warning valves and transmitters must be
installed.

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 accident, causing death or serious injury.

●

Use the correct wheel bolts for the wheels to be installed.
For details, contact your Lexus dealer.

■

Wheel bolts

Observe the following precautions to reduce the risk of death or serious injury:

●

Do not over tighten.

●

Never use oil or grease on the wheel bolts. Oil and grease may cause the wheel bolts
to be excessively tightened, leading to bolt or disc wheel damage. In addition, the oil

*1 : 

Conventionally referred to as offset.

8-5. Tire maintenance

618

WARNING

or grease can cause the wheel bolts to loosen and the wheel may fall off, causing a
serious accident. Remove any oil or grease from the wheel bolts.

●

If there are any cracks or deformations in the wheel bolts, or if the surface treatment
becomes worn, have the wheel bolts replaced at your Lexus dealer. Failure to follow
these precautions could cause the wheel bolts to loosen and the tire to fall off, resulting
in 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 accident.

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 your Lexus dealer or other qualified
service shop. In addition, make sure to purchase your tire pressure warning valves and
transmitters at your Lexus dealer.

●

Ensure that only genuine Lexus wheels are used on your vehicle.
Tire pressure warning valves and transmitters may not work properly with non-genuine
wheels.

Aluminum wheel precautions

Observe the following precautions when handling the aluminum wheels.

●

Use only Lexus wheel bolts and wrenches designed for use with your aluminum
wheels.

●

When rotating, repairing or changing your tires, check that the wheel bolts are
still tight after driving 621 miles (1000 km).

●

Be careful not to damage the aluminum wheels when using tire chains.

●

Use only Lexus genuine balance weights or equivalent and a plastic or rubber
hammer when balancing your wheels.

8-5. Tire maintenance

619

8

Maintenance and car

e

Replacing 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.

Preparation for lifting the vehicle with a jack

INFORMATION

■

Jack and tools

As your vehicle is equipped 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.

●

Jack

●

Jack handle

●

Wheel bolt socket

●

Guide pin

●

Wheel bolt wrench

Before lifting the vehicle with a jack, perform the following.

●

Stop the vehicle in a safe place on a hard, flat surface.

●

Set the parking brake.

●

Change the shift position to P.

●

Stop the hybrid system.

Storage position of the tools and jack

8-5. Tire maintenance

620

A

Jack

*

WARNING

Improper use of the tire jack may cause the vehicle to fall. Therefore, observe the
following precatutions.

●

Do not use the tire jack for any purpose other than replacing tires or installing and
removing tire chains.

●

Only use the tire jack that comes with this vehicle for replacing a flat tire. Do not
use it on other vehicles, and do not use other tire jacks for replacing tires on this
vehicle.

B

Jack handle

*

C

Wheel bolt socket

*

D

Towing eyelet

E

Guide pin

*

F

Wheel bolt wrench

*

G

Screwdriver

Taking out the jack

1

Remove the deck board.

2

Take out the jack.

 

A

Disengage the tightening strap.

* : 

If equipped

8-5. Tire maintenance

621

8

Maintenance and car

e

Removing a tire

WARNING

■

Precautions for replacing a tire

●

Do not try to remove the wheel ornament by hand.
Take due care in handling the ornament to avoid unexpected personal injury.

●

Do not touch the disc wheels or the area around the brakes immediately after the
vehicle has been driven.
After the vehicle has been driven the disc wheels and the area around the brakes
will be extremely hot. Touching these areas with hands, feet or other body parts while
changing a tire, etc., may result in burns.

■

Setting the power back door when replacing the tires

When replacing a tire, make sure to disable the power back door. If not disabled, the
power back door may operate unintentionally, and hands or fingers may be caught and
injured.

1

Chock the tires.

Wheel chock position

●

Flat tire: Front left
Place the wheel chock behind the rear right tire.

●

Flat tire: Front right
Place the wheel chock behind the rear left tire.

●

Flat tire: Rear left
Place the wheel chock in front of the front right tire.

●

Flat tire: Rear right
Place the wheel chock in front of the front left tire.

8-5. Tire maintenance

622

2

Using a wheel bolt wrench, slightly loosen the
wheel bolts (approximately one turn).

3

Turn the tire jack portion   by hand until the
notch of the jack is in contact with the jack
point.

WARNING

Make sure the jack is positioned properly in the jack point.

4

Install the wheel bolt socket to the jack han-
dle.

5

Raise the vehicle until the tire is slightly raised
off the ground.

WARNING

Observe the following precautions when using the jack.

8-5. Tire maintenance

623

8

Maintenance and car

e