Lexus NX (2023 year). Manual in english

Operation of the tire pressure warning system

Your vehicle is equipped with a tire pressure warning system that uses tire pressure
warning valves and transmitters to detect low tire inflation pressure before serious
problems arise.
The tire pressure warning system of this vehicle adopts a 2-type warning system.

▶

Multi-information display (vehicles without a head-up display)

▶

Multi-information display (vehicles with a head-up display)

▶

Center display

●

When "Adjust Pressure" is displayed (Normal Warning)
A warning with the tire pressure warning light and warning buzzer when there
is an unknown level of low tire pressure with the appearance of the tire due

8-5. Tire maintenance

501

Maintenance and car

to natural air leakage as well as the pressure lowering due to changes in the
pressure according to the outside temperature.

●

When "Immediately Check tyre when Safe" is displayed (Emergency Warning)
A warning with the tire pressure warning light and warning buzzer when there is
a known level of low tire pressure with the appearance of the tire due to pressure
suddenly lowering.
However, the system may not be able to detect sudden tire ruptures (bursting,
etc.).

●

The tire pressure detected by the tire pressure warning system can be displayed
on the center display.

INFORMATION

■

Routine tire inflation pressure checks

The tire pressure warning system does not replace routine tire inflation pressure checks.
Make sure to check tire inflation pressure as part of your routine of daily vehicle checks.

■

Tire inflation pressure

●

It may take a few minutes to display the tire inflation pressure after the engine switch is
turned to ON.
It may also take a few minutes to display the tire inflation pressure after inflation
pressure has been adjusted.

●

Tire inflation pressure changes with temperature. The displayed values may also be
different from the values measured using a tire pressure gauge.

■

Situations in which the tire pressure warning system may not operate properly

●

In the following cases, the tire pressure warning system may not operate properly.

•

If non-genuine Lexus wheels are used.

•

A tire has been replaced with a tire that is not an OE (Original Equipment) tire.

•

A tire has been replaced with a tire that is not of the specified size.

•

Tire chains, etc. are equipped.

•

If a window tint that affects the radio wave signals is installed.

•

If there is a lot of snow or ice on the vehicle, particularly around the wheels or wheel
housings

•

If the tire inflation pressure is extremely higher than the specified level.

•

If tires not equipped with tire pressure warning valves and transmitters are used.

8-5. Tire maintenance

502

•

If the ID code on the tire pressure warning valves and transmitters is not registered
in the tire pressure warning computer.

●

Performance may be affected in the following situations.

•

Near a TV tower, electric power plant, gas station, radio station, large display,
airport or other facility that generates strong radio waves or electrical noise.

•

When carrying a portable radio, cellular phone, cordless phone or other wireless
communication device.

If tire position information is not correctly displayed due to the radio wave conditions,
the display may be corrected by changing the location of the vehicle as the radio wave
conditions may change.

●

When the vehicle is parked, the time taken for the warning to start or go off could be
extended.

●

When tire inflation pressure declines rapidly for example when a tire has burst, the not
to able detect.

Installing tire pressure warning valves and transmitters

NOTICE

■

Repairing or replacing tires, wheels, tire pressure warning valves, transmitters 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
damaged 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, corrode the valve, and cause sticking and
air leaks.

●

When replacing tire valve caps, do not use tire valve caps other than those specified.
The cap may become stuck.

When replacing tires or wheels, tire pressure warning valves and transmitters 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

8-5. Tire maintenance

503

Maintenance and car

INFORMATION

■

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.
In this case, after driving for about 10 minutes, the tire pressure warning light blinks for 1
minute and stays on to indicate a system malfunction.

Registration of the position of each wheel after performing a tire rota-
tion

It is necessary to register the position of each wheel after performing a tire
rotation.
Wheel position registration can be performed by oneself. Wheel position registra-
tion is performed by driving forward with moderate left and right turns. However,
depending on the driving conditions and driving environment, registration may
take some time to complete.

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

Start the engine.

The wheel position registration procedure cannot be performed while the vehicle is
moving.

Select

on the center display.

Select [Vehicle customise].

Select [Tyre pressure].

Select [Tyre rotation].

Select [Continue].

A message indicating that wheel position registration is being performed will be
displayed on the multi-information display. "---" will be displayed for the tire inflation
pressure of each tire and wheel position registration will begin.

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

When wheel position registration is complete, a message indicating that registration
has been completed and the inflation pressure of each tire will be displayed on the
multi-information display.

8-5. Tire maintenance

504

Even if it is not possible to drive continuously at approximately 40 km/h (25 mph) or
more, registration can be completed by driving for a long time. However, if registration
does not complete after driving for 1 hour or more, park the vehicle in a safe place and
leave it with the engine switch in ON for approximately 15 minutes or more, and then
perform the driving procedure again.

INFORMATION

■

When performing wheel position registration

●

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

●

Wheel position registration is performed while driving at a vehicle speed of
approximately 40 km/h (25 mph) or more.

■

Wheel position registration procedure

●

If the engine switch is turned off while registering the wheel position, the next time
the engine switch is turned to ON, the wheel position registration will resume and
it will not be necessary to restart the procedure.

●

While the position of each wheel is being determined and the inflation pressures
are not being displayed, if the inflation pressure of a tire drops, the tire pressure
warning light will come on.

■

If the wheel position cannot be registered easily

●

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

•

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

•

Vehicle is driven on unpaved roads

•

If wheel position registration does not complete after driving for 1 hour or
more, park the vehicle in a safe place for approximately 15 minutes and then
drive the vehicle again.

●

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

Setting the tire pressure

In the following situations, it will be necessary to perform the tire inflation pressure
setting procedure of the tire pressure warning system.

●

When the specified tire inflation pressure has changed, such as due to carried
load, etc.

●

When the tire inflation pressure is changed such as when the tire size is
changed.

8-5. Tire maintenance

505

Maintenance and car

If the tire inflation pressure has been adjusted to the specified level, perform the tire
inflation setting procedure by selecting specified inflation pressure on the center
display.
When the tire inflation pressure is to be other than specified, such as when tires
other than the specified size are used, etc., set the tire inflation pressure using
the current pressure. Make sure to adjust the tire inflation pressure of each tire
to the appropriate level before performing tire pressure setting. The tire pressure
warning system operates based on this tire inflation pressure.

Setting by selecting a specified tire inflation pressure

Start the engine.

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

Select

on the center display.

Select [Vehicle customise].

Select [Tyre pressure].

Select [Set indicated air pressure] and then select the desired front and rear
tire pressures.

Select [OK].

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

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.

8-5. Tire maintenance

506

●

If tire inflation pressure setting procedure cannot be completed after performing
the above procedure, contact any authorized Lexus retailer or Lexus authorized
repairer, or any reliable repairer.

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.

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

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

Start the engine.

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

Select

on the center display.

Select [Vehicle customise].

Select [Tyre pressure].

Select [Set current air pressure].

8-5. Tire maintenance

507

Maintenance and car

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
multi-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 engine switch is turned off while setting the tire inflation pressure, the next
time the engine 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 tire inflation pressure setting procedure cannot be completed after performing
the above procedure, contact any authorized Lexus retailer or Lexus authorized
repairer, or any reliable repairer.

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

508

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

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

Start the engine.

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

Select

on the center display.

Select [Vehicle customise].

Select [Tyre pressure].

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.

Select [New tyre registration].

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.

8-5. Tire maintenance

509

Maintenance and car

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

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 40 km/h (25 mph) 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 40 km/h (25 mph) 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 40 km/h (25 mph) 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 any authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer.

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.

8-5. Tire maintenance

510

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

Related Links

Setting the tire pressure(P. 505)

Canceling ID code registration

To cancel ID code registration after it has been started, select [New tyre 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 tyre 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.

Install the desired wheel set.

Select

on the center display.

Select [Vehicle customise].

Select [Tyre pressure].

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

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

511

Maintenance and car

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 approxi-
mately 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.

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.

8-5. Tire maintenance

512

Checking 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

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 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.

8-5. Tire maintenance

513

Maintenance and car

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
reading.

●

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.

●

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.

8-5. Tire maintenance

514

Rotating the tires

To equalize tire wear and help extend tire life, Lexus recommends that you rotate
your tires approximately at the following intervals:
2WD models: Rotate the tires every 10000 km (6000 miles)
AWD models: Rotate the tires every 5000 km (3000 miles)
Rotate the tires as shown in the illustration.
Make sure to perform wheel position registration procedure after rotating the tires.

Front

8-5. Tire maintenance

516

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

Replacement wheels are available at any authorized Lexus retailer or Lexus au-
thorized repairer, or any reliable repairer.
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 any authorized Lexus retailer or Lexus authorized repairer, or any
reliable repairer.

■

Wheel bolts

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

*1 :

Conventionally referred to as offset.

8-5. Tire maintenance

517

Maintenance and car

WARNING

●

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
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 any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer. 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 any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer or other qualified service shop. In
addition, make sure to purchase your tire pressure warning valves and transmitters at
any authorized Lexus retailer or Lexus authorized repairer, or any reliable repairer.

●

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 1000 km (621 miles).

●

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

518

When trouble arises

9-1. What to do if a problem occurs

while driving

What to do if a problem oc-

curs while driving........................

521

9-2. If a warning light illuminates/flash-

es or a warning message is dis-
played on the meter

If a warning light turns on/

flashes.............................................

525

If a warning message is dis-

played.............................................

537

9-3. If the engine will not start

When the engine will not start

even though the starter op-
erates...............................................

551

When the starter operates

slowly and the engine cannot
be started......................................

552

When the starter does not op-

erate and the engine cannot
be started......................................

553

When the interior lights or

headlights are dim and the
engine cannot be started ......

556

When the interior lights or

headlights do not illuminate
and the engine cannot be
started ............................................

562

When the horn sounds at a

low volume and the engine
cannot be started .....................

563

When the horn does not

sound and the engine cannot
be started.....................................

564

9-4. If a tire is flat

Replacing a tire with a spare

tire (vehicles with a spare
tire) .................................................

565

If you get a flat front tire on a

snowy or icy road (vehicles
with a spare tire).........................

576

Precautions for when you

have a flat tire (vehicles with
run-flat tires) ................................

577

9-5. If a door cannot be opened or

locked

If a key has been lost....................

578

When the doors/windows/

moon roof cannot be operat-
ed using an electronic key .....

579

If a door cannot be opened

using the door opener switch

..........................................................

589

If the rear doors cannot be

opened from the inside ...........

592

If the back door cannot be

opened...........................................

593

9-6. If the moon roof or electronic

sunshade does not operate cor-
rectly

If the moon roof does not op-

erate correctly ............................

595

519

When tr

ouble arises

What to do if a problem occurs while driving

Using the emergency flashers to warn other drivers

Use the emergency flashers to inform other drivers of the presence of your vehicle
when it is stopped on the road, such as if the vehicle has broke down.
Press the switch.

All the turn signal lights will flash. To turn them off,
press the switch once again.

INFORMATION

■

Emergency flashers

●

If the emergency flashers are used for a long time with the engine stopped, the battery
may become discharged.

●

If any of the SRS airbags deploy (inflate) or in the event of a strong rear impact, the
emergency flashers will turn on automatically.
The emergency flashers will turn off automatically after operating for approximately
20 minutes. To manually turn the emergency flashers off, press the switch twice. (The
emergency flashers may not turn on automatically depending on the force of the
impact and conditions of the collision.)

Stopping the vehicle in an emergency

Stop the vehicle using the following procedure only in an emergency, such as if it
becomes impossible to stop the vehicle in the normal way:

WARNING

■

If the engine has to be stopped while driving

Power assist for the brakes and steering wheel will be lost, making the brake pedal harder
to depress and the steering wheel heavier to turn. Decelerate as much as possible before
stopping the engine.

Steadily step on the brake pedal with both feet and firmly depress it.

Do not pump the brake pedal repeatedly as this will increase the effort required to
slow the vehicle.

9-1. What to do if a problem occurs while driving

521

When tr

ouble arises

Change the shift position to N.

●

If the shift position is changed to N:
After slowing down, stop the vehicle in a safe place by the road.
Stop the engine.

●

If the shift position cannnot be changed to N:
Keep depressing the brake pedal with both feet to reduce vehicle speed as much as
possible.
To stop the engine, press and hold the engine switch for 2 consecutive seconds or
more, or press it briefly 3 times or more in succession.

Stop the vehicle in a safe place by the road.

WARNING

To restart the engine after performing an emergency shutdown, change the shift
position to N and then press the engine switch.

If the vehicle is submerged or water on the road is rising

This vehicle is not designed to be able to drive on roads that are deeply flooded
with water. Do not drive on roads where the roads may be submerged or the water
may be rising. It is dangerous to remain in the vehicle, if it anticipated that the
vehicle will be flooded or set a drift.
Remain calm and follow the following.

●

If the door can be opened, open the door and exit the vehicle.

●

If the door cannot be opened, open the window using the power window switch
and ensure an escape route.

●

If the window can be opened, exit the vehicle through the window.

●

If the door and window cannot be opened due to the rising water, remain calm,
wait until the water level inside the vehicle rises to the point that the water
pressure inside of the vehicle equals the water pressure outside of the vehicle
and then open the door after waiting for the rising water to enter the vehicle, and
exit the vehicle.

9-1. What to do if a problem occurs while driving

522

When the outside water level exceeds half the height of the door, the door cannot be
opened from the inside due to water pressure.

INFORMATION

■

Water level exceeds the floor

When the water level exceeds the floor and time has passed, the electrical equipment will
get damaged, the power windows will not operate, the engine stop, and the vehicle may
not be able to get moving.

■

Using an emergency escape hammer

Laminated glass

is used in the windshield and the windows on this vehicle. Laminated

glass cannot be shattered with an emergency hammer

■

How to distinguish laminated glass

When looking from the cross-sectional view point, laminated glass is two sheets of glass
pasted together.

Laminated glass

Tempered glass

WARNING

■

Caution while driving

Do not drive on roads where the roads may be submerged or the water may be rising.
Otherwise the vehicle may be damaged and cannot move, as well as become flooded
and set a drift, which may lead to death.

Operation of the fuel pump shut off system

When a certain level of impact is detected by an impact sensor due to a collision
and an airbag deploys or the engine is stopped, the fuel pump shut off system
operates to stop the supply of fuel and minimize the risk of fuel leakage.

* :

If equipped

*1 :

Contact your Lexus dealer or aftermarket accessory manufacturer for further infor-

mation about an emergency hammer.

9-1. What to do if a problem occurs while driving

523

When tr

ouble arises

Restarting the engine

NOTICE

Before starting the engine, make sure to thoroughly check the area under the vehicle. If
leaked fuel is found on the ground, the fuel system is damaged and needs to be repaired.
In this situation, do not restart the engine.

Perform the following procedure to restart the engine after the fuel pump shut off
system has operated.

Turn the engine switch to ACC or OFF.

Restart the engine.

9-1. What to do if a problem occurs while driving

524

If a warning light illuminates/flashes or a warning message is displayed on the meter

If a warning light turns on/flashes

Calmly perform the following actions if any of the warning lights comes on or
flashes. If a light comes on or flashes, but then goes off, this does not necessarily
indicate a malfunction in the system. However, if this continues to occur, have the
vehicle inspected by any authorized Lexus retailer or Lexus authorized repairer, or
any reliable repairer.

INFORMATION

■

Warning buzzer

In some cases, the buzzer may not be heard due to being in a noisy location or audio
sound.

Brake system warning light (warning buzzer)

Condition

Cause / Remedy

(red)

Indicates that:

●

The brake fluid level is low; or

●

The brake system is malfunctioning

Immediately stop the vehicle in a safe place and contact any au-
thorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer. Continuing to drive the vehicle may be dangerous.

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 reliable 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.

Brake system warning light (warning buzzer)

Condition

Cause / Remedy

(yel-

low)

Indicates a malfunction in the electric parking brake
Have the vehicle checked by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

525

When tr

ouble arises

WARNING

High coolant temperature warning light (warning buzzer)

Condition

Cause / Remedy

This light illuminates on the

multi-information display.

Indicates that the engine coolant temperature is too
high
Immediately stop the vehicle in a safe take the cor-
rective actions for overheating.

Related Links

If your vehicle overheats(P. 620)

Charging system warning light (warning buzzer)

Condition

Cause / Remedy

This light illuminates

on the multi-informa-

tion display.

Indicates a malfunction in the vehicle’s charging system
Immediately stop the vehicle in a safe place and con-
tact any authorized Lexus retailer or Lexus authorized
repairer, or any reliable repairer.

Low engine oil pressure warning light (warning buzzer)

Condition

Cause / Remedy

This light illuminates on

the multi-information

display.

Indicates that the engine oil pressure is too low
Immediately stop the vehicle in a safe place and con-
tact any authorized Lexus retailer or Lexus authorized
repairer, or any reliable repairer.

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

526

Malfunction indicator lamp

Condition

Cause / Remedy

Indicates a malfunction in:

●

The emission control system (on some models);

●

The electronic engine control system;

●

The electronic throttle control system; or

●

The electronic transmission control system

Immediately stop the vehicle in a safe place and contact any au-
thorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer.

INFORMATION

■

If the malfunction indicator lamp comes on while driving

For some models, the malfunction indicator lamp will come on if the fuel tank becomes
completely empty. If the fuel tank is empty, refuel the vehicle immediately. The malfunc-
tion 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.

SRS warning light

Warning

light

Details / Actions

●

The SRS airbag system is malfunctioning

●

The seat belt pretensioner system is malfunctioning

Have the vehicle checked by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

527

When tr

ouble arises

ABS warning light (warning buzzer)

Condition

Cause / Remedy

Indicates a malfunction in:

●

The ABS; or

●

The brake assist system

Have the vehicle checked by any authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer immediately.

WARNING

Inappropriate pedal operation warning light (warning buzzer)

Condition

Cause / Remedy

This light illuminates on

the multi-information

display.

When a buzzer sounds:
Indicates a malfunction in:

●

The Brake Override System

●

The Drive-Start Control

Have the vehicle checked by any authorized Lexus
retailer or Lexus authorized repairer, or any reliable
repairer immediately.

When a buzzer sounds:
Indicates that the shift position was changed and Drive-
Start Control was operated while depressing the accel-
erator pedal.
Momentarily release the accelerator pedal.

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

528

Condition

Cause / Remedy

This light illuminates on

the multi-information

display.

When a buzzer sounds:
PKSB (Parking Support Brake) has operated
Follow the instructions displayed on the multi-informa-
tion display.

When a buzzer does not sound:
Indicates that the accelerator and brake pedals are be-
ing depressed simultaneously, and the Brake Override
System is operating.
Release the accelerator pedal and depress the brake
pedal.

Electric power steering system warning light (warning buzzer)

Condition

Cause / Remedy

(red/

yellow)

Indicates a malfunction in the EPS (Electric Power Steering)
system
Have the vehicle checked by any authorized Lexus retailer or
Lexus authorized repairer, or any reliable repairer immediately.

INFORMATION

■

Electric power steering system warning light (warning buzzer)

When the battery charge becomes insufficient or the voltage temporarily drops, the
electric power steering system warning light may come on and the warning buzzer may
sound.

WARNING

When the electric power steering system warning 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.

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

529

When tr

ouble arises

Low fuel level warning light

Condition

Cause / Remedy

Indicates that remaining fuel is approximately 8.5 L (2.3 gal., 1.9 Imp.
gal.) or less
Refuel the vehicle.

Driver’s and front passenger’s seat belt reminder light (warning buzzer)

Condition

Cause / Remedy

Warns the driver and/or front passenger to fasten their seat belts
Fasten the seat belt.
If the front passenger’s seat is occupied, the front passenger’s seat
belt also needs to be fastened to make the warning light (warning
buzzer) turn off.

INFORMATION

■

Driver’s and front passenger’s seat belt warning buzzer

The driver’s and front passenger’s seat belt warning buzzer sounds to alert the driver
and front 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 after the vehicle reaches a
certain speed.

■

Front passenger detection sensor, seat belt reminder and warning buzzer

●

If luggage is placed on the 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.

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

530

Rear passengers’ seat belt reminder lights (warning buzzer)

Condition

Cause / Remedy

(Vehicles without a head-up display)

(Vehicles with a head-up display)

Warns the rear passengers to fasten their
seat belts
Fasten the seat belt.

INFORMATION

■

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 after the vehicle reaches a certain speed.

Tire pressure warning light (warning buzzer)

Condition

Cause / Remedy

When the light comes on after blinking for approximately 1 minute (a
buzzer does not sounds):
Malfunction in the tire pressure warning system
Have the system checked by any authorized Lexus retailer or Lexus
authorized repairer, or any reliable repairer.

When the light comes on (a buzzer sounds):
Low tire inflation pressure from natural causes
After the temperature of the tires has lowered sufficiently, check the
inflation pressure of each tire and adjust them to the specified level.

When the light comes on (a buzzer sounds):
Low tire inflation pressure from flat tire
Immediately stop the vehicle in a safe place and perform the necessa-
ry actions

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

531

When tr

ouble arises

INFORMATION

■

If the tire pressure warning light comes on

Inspect the tires to check if a tire is punctured.

●

If a tire is punctured:

→

P.565

●

If none of the tires are punctured: Turn the engine switch off then turn it to ON. Check
if the tire pressure warning light comes on or blinks.

•

If the tire pressure warning light blinks for approximately 1 minute then stays on
There may be a malfunction in the tire pressure warning system. Have the vehicle
inspected by any authorized Lexus retailer or Lexus authorized repairer, or any
reliable repairer immediately.

•

If the tire pressure warning light comes on
After the temperature of the tires has lowered sufficiently, check the inflation
pressure of each tire and adjust them to the specified level.
If the warning light does not turn off even after several minutes have elapsed, check
that the inflation pressure of each tire is at the specified level and perform the tire
inflation pressure setting procedure.
If the warning light does not turn off even after several minutes have elapsed since
performing the tire inflation pressure setting procedure, have the vehicle inspected
by any authorized Lexus retailer or Lexus authorized repairer, or any reliable
repairer as soon as possible.

■

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, adjusting
the tire inflation pressure will turn off the warning light (after a few minutes).

■

When a tire is replaced with a spare tire (vehicles with a compact spare tire)

The spare tire is not equipped with a tire pressure warning valve and transmitter. If a tire
goes flat, the tire pressure warning light will not turn off even though the flat tire has been
replaced with the spare tire. Replace the spare tire with the repaired tire and adjust the
tire inflation pressure. The tire pressure warning light will go off after a few minutes.

WARNING

■

If the tire pressure warning light comes on

Be sure to observe the following precautions. Failure to do so could cause a loss of
vehicle control and result in death or serious injury.

●

Vehicles with run-flat tires:

9-2. If a warning light illuminates/flashes or a warning message is displayed on the meter

532

Lexus NX (2023 year). Manual in english - page 16