Lexus NX250 (2022 year). Manual in english — page 36

When the horn sounds at a low volume and the engine cannot be started

Cause

Remedy

The battery may be discharged.

Restarting the engine using the jumper (or
booster) cables.

The battery terminal connections
may be loose or corroded.

The battery terminals may be loose or cor-
roded.

Related Links

If the vehicle battery is discharged(P. 589)
Restarting the engine when the battery is discharged(P. 630)
If the vehicle battery is discharged(P. 589)

9-3. If the engine will not start

596

When the horn does not sound and the engine cannot be started

Cause

Remedy

The battery may be dis-
charged.

Restarting the engine using the jumper (or booster)
cables.
Contact your Lexus dealer if the problem cannot be
repaired, or if repair procedures are unknown.

One or both of the bat-
tery terminals may be dis-
connected.

Check if a battery terminal is loose.
Contact your Lexus dealer if the problem cannot be
repaired, or if repair procedures are unknown.

The steering lock system
may be malfunctioning.

Contact your Lexus dealer.

Related Links

If the vehicle battery is discharged(P. 589)
Restarting the engine when the battery is discharged(P. 630)
If the vehicle battery is discharged(P. 589)

9-3. If the engine will not start

597

9

When tr

ouble arises

If a tire is flat

Repairing a tire with the emergency tire puncture repair kit (vehicles
with an emergency tire puncture repair kit)

Your vehicle is not equipped with a spare tire, but instead is equipped with an
emergency tire puncture repair kit.
A puncture caused by a nail or screw passing through the tire tread can be
repaired temporarily with the emergency tire puncture repair kit. (The kit contains
a bottle of sealant. The sealant can be used only once to temporarily repair one tire
without removing the nail or screw from the tire.)
After temporarily repairing the tire with the kit, have the tire repaired or replaced
by your Lexus dealer.

WARNING

Do not continue driving with a flat tire.
Driving even a short distance with a flat tire can damage the tire and the wheel beyond
repair.
Driving with a flat tire may cause a circumferential groove on the side wall. In such a case,
the tire may explode when using the emergency tire puncture repair kit, resulting in death
or serious injury.

INFORMATION

■

A flat tire that cannot be repaired with the emergency tire puncture repair kit

In the following cases, the tire cannot be repaired with the emergency tire puncture
repair kit.
Contact your Lexus dealer.

●

When the tire is damaged due to driving without sufficient air pressure

●

When the tire lost air pressure due to a crack or damage in the tire sidewall

●

When the tire is visibly separated from the wheel

●

When the cut or damage to the tread is 0.16 in. (4 mm) long or more

●

When the wheel is damaged

●

When two or more tires have been punctured

●

When there is more than one hole or cut in the damaged tire

●

When the sealant has expired

Preparing to use the emergency tire puncture repair kit

Before using the emergency tire puncture repair kit, perform the following.

9-4. If a tire is flat

598

●

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

●

Set the parking brake.

●

Change the shift position to P.

●

Stop the engine.

●

Turn on the emergency flashers.

●

Check the degree of the tire damage.

A tire should only be repaired with the emergency tire puncture repair kit if the damage
is caused by a nail or screw passing through the tire tread.

•

Do not remove the nail or screw from the tire. Removing the object may widen the
opening and disenable emergency repair with the kit.

•

To avoid sealant leakage, move the vehicle until the area of the puncture, if known, is
positioned at the top of the tire.

Storage position of the emergency tire puncture repair kit and tool

A

Emergency tire puncture repair kit

B

Towing eyelet

C

Screwdriver

Emergency tire puncture repair kit details/name of each part

WARNING

■

Precautions for handling the emergency tire puncture repair kit

●

The emergency tire puncture repair kit is made exclusively for your vehicle. Do not use
it on other vehicles.

9-4. If a tire is flat

599

9

When tr

ouble arises

WARNING

●

Do not use the emergency tire puncture repair kit for tires that are a different size than
the specified ones or for any other purpose.
Doing so may cause the tires to not be repaired properly.

■

Precautions for use of the sealant

●

Ingesting the sealant is hazardous to your health. If you ingest sealant, consume as
much water as possible, then immediately consult a doctor.

●

If sealant gets in eyes or adheres to skin, immediately wash it off with water. If
discomfort persists, consult a doctor.

▶

Bottle

A

Hose

B

Air release cap

C

Sticker

▶

Compressor

A

Power plug

B

Rubber stopper

C

Air pressure gauge

D

Compressor switch

INFORMATION

■

Handling the emergency tire puncture repair kit/sealant

●

The emergency tire puncture repair kit is designed to inflate vehicle tires.

●

Do not use to check or to adjust the tire pressure.

●

The kit is exclusively designed for size and type of tires originally installed on your
vehicle. Do not use it for tires that a different size than the original ones, or for any
other purposes.

●

The sealant stored in the emergency tire puncture repair kit can be used only once to
temporarily repair a single tire.

9-4. If a tire is flat

600

If the sealant in the bottle and other parts of the kit have been used and need to be
replaced, contact your Lexus dealer.

●

The sealant can be used when the outside temperature is from -40°F (-40°C) to
140°F (60°C).

●

If the sealant gets on your clothes, it may stain.

●

If the sealant adheres to a wheel or the surface of the vehicle body, the stain may not
be removable if it is not cleaned at once. Immediately wipe away the sealant with a wet
cloth.

●

The compressor can be used repeatedly.

●

During operation of the kit, a loud operation noise is produced. This does not indicate
a malfunction.

■

Checking the sealant

The sealant has a limited lifespan. Check the sealant expiration date occasionally.
The expiration date is printed on the bottle.
The sealant should be replaced before the expiry date. Contact your Lexus dealer.
Do not use sealant whose expiry date has already passed. Otherwise, repairs conducted
using the emergency tire puncture repair kit may not be performed properly.

■

When disposing of the liquid sealant

The liquid sealant contains materials which are harmful to the environment. When
disposing of liquid sealant or a liquid sealant bottle, contact your Lexus dealer or contact
your local government for information on the appropriate authorized waste disposal
method.

Taking out the emergency tire puncture repair kit

1

Remove the deck board.

2

Take out the emergency tire puncture repair kit.

Repairing a flat tire

WARNING

Observe the following when repairing a flat tire.

9-4. If a tire is flat

601

9

When tr

ouble arises

WARNING

●

Stop your vehicle in a safe and flat area.

●

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

●

Perform repairs according to the specified procedure.
If the procedure is not followed, the tire sealant may spray.

NOTICE

■

Precautions for repairing a flat tire

●

Perform the emergency repair without removing the nail or screw that has punctured
the tread of the tire. If the object that has punctured the tire is removed, repair by the
emergency tire puncture repair kit may not be possible.

●

The kit is not waterproof. Make sure that the kit is not exposed to water, such as when it
is being used in the rain.

●

Do not put the kit directly onto dusty ground such as sand at the side of the road. If the
kit vacuums up dust, etc., a malfunction may occur.

●

Make sure to stand the kit with the bottle vertical. The kit cannot work properly if it is
laid on its side.

■

Handling the emergency tire puncture repair kit

●

The compressor power source should be 12 V DC suitable for vehicle use. Do not
connect the compressor to any other source.

●

Take care not to allow gasoline to contact the emergency tire puncture repair kit. If
gasoline splatters on the kit, it may deteriorate.

●

Place the repair kit in a storage to prevent it from being exposed to dirt or water.

●

Store the kit in its assigned place out of reach of children.

●

Do not disassemble or modify the kit. Do not subject parts such as the air pressure
indicator to impacts. This may cause a malfunction.

■

To avoid damage to the tire pressure warning valves and transmitters

When a tire is repaired with liquid sealants, the tire pressure warning valve and transmit-
ter may not operate properly. If a liquid sealant is used, contact your Lexus dealer as soon
as possible. After use of liquid sealant, make sure to replace the tire pressure warning
valve and transmitter when repairing or replacing the tire.

1

Take out the emergency tire puncture repair kit.

9-4. If a tire is flat

602

2

Remove the valve cap from the valve of the punctured tire.

3

Extend the hose. Remove the air release cap from the hose.

Attach the sticker enclosed with the bottle on the specified locations.(See step

10

.)

The air release cap may be used later. Therefore keep it in a safe place.

4

Connect the hose to the valve of the flat tire.

Screw the end of hose clockwise as far as possible.

WARNING

Check the following.

●

Make sure that the valve and hose are securely connected, with the tire installed
on the vehicle.

●

If the hose is not properly connected to the valve, air leakage may occur or sealant
may be sprayed out.

9-4. If a tire is flat

603

9

When tr

ouble arises

WARNING

●

If the hose comes off the valve while inflating the tire, there is a risk that the hose
will move abruptly due to air pressure.

5

Make sure that the compressor switch is off.

6

Lift the rubber stopper on the compressor.

7

Remove the power plug from the compressor.

8

Connect the power plug to the power outlet socket.

9-4. If a tire is flat

604

9

Connect the bottle to the compressor.

As shown in the illustration, insert the bottle securely into the compressor until the
upper side of the mark on the bottle is aligned with the upper end of the notch.

10

Attach the sticker provided with the tire puncture repair kit to a position easily
seen from the driver’s seat.

A

U.S.A.

9-4. If a tire is flat

605

9

When tr

ouble arises

B

Canada

WARNING

Do not attach the vehicle speed warning sticker to an area other than the one
indicated. If the sticker is attached to an area where an SRS airbag is located, such as
the pad of the steering wheel, it may prevent the SRS airbag from operating properly.

11

Check the specified tire inflation pressure.

Tire inflation pressure is specified on the label as shown.

12

Start the engine.

13

To inject the sealant and inflate the tire, turn the compressor switch on.

WARNING

Observe the following precautions.

●

Keep back from the tire while it is being repaired, as there is a chance of it
bursting while the repair operation is being performed. If you notice any cracks
or deformation in the tire, turn off the compressor switch and stop the repair
operation immediately.

●

Do not operate the compressor continuously for more than 40 minutes. The kit
may overheat if operated for a long period of time.

●

Parts of the emergency tire puncture repair kit become hot during operation. Be
careful when handling it during and after operation.

9-4. If a tire is flat

606

WARNING

●

Do not touch the metal connecting parts of the bottle and compressor while being
used or immediately after, as they will be extremely hot.

14

Inflate the tire until the specified pressure is reached.

A

The sealant will be injected and the pressure will spike to between 44 psi (300
kPa, 3.0 kgf/cm

2

or bar) and 58 psi (400 kPa, 4.0 kgf/cm

2

or bar), then gradually

decrease.

B

The air pressure gauge will display the actual tire inflation pressure about 1 to 5
minutes after the switch is turned on.

●

Turn the compressor switch off and then check the tire inflation pressure. Being
careful not to over inflate, check and repeat the inflation procedure until the
specified tire inflation pressure is reached.

●

The tire can be inflated for about 5 to 20 minutes (depending on the outside
temperature). If the tire inflation pressure is still lower than the specified point
after inflation for 25 minutes, the tire is too damaged to be repaired. Turn the
compressor switch off and contact your Lexus dealer.
If the tire inflation pressure exceeds the specified level, let out some air to adjust
the tire inflation pressure.

15

With the compressor switch off, disconnect the hose from the valve on the tire
and then pull out the power plug from the power outlet socket.

Some sealant may leak when the hose is removed.

9-4. If a tire is flat

607

9

When tr

ouble arises

WARNING

After inflation of the tire has completed, the sealant may splatter when the hose is
disconnected or some air is let out of the tire.

16

Install the valve cap onto the valve of the emergency repaired tire.

17

Attach the air release cap to the end of the hose.

If the air release cap is not attached, the sealant may leak and dirty the interior of the
vehicle or ones clothes.

18

Temporarily store the bottle in the luggage compartment while it is connected
to the compressor.

19

To spread the liquid sealant evenly within the tire, immediately drive safety for
about 3 miles (5 km) below 50 mph (80 km/h).

WARNING

Observe the following precautions when driving to spread the sealant evenly.

●

Drive the vehicle carefully at a low speed. Be especially careful when turning and
cornering.

●

If the vehicle does not drive straight or you feel a pull through the steering wheel,
stop the vehicle and check the following:

•

Tire condition. The tire may have separated from the wheel.

•

Tire inflation pressure. If the tire inflation pressure is 19 psi (130 kPa, 1.3 kgf/cm

2

or bar) or below, this may indicate severe tire damage.

20

After driving, stop your vehicle in a safe place on a hard, flat surface and
reconnect the emergency tire puncture repair kit.

Remove the air release cap from the hose before reconnecting the hose.

9-4. If a tire is flat

608

21

Turn the compressor switch on and wait for several seconds, then turn it off.
Check the tire inflation pressure.

A

If the tire inflation pressure is below 19 psi (130 kPa, 1.3 kgf/cm

2

or bar): The

puncture cannot be repaired. Contact your Lexus dealer.

B

If the tire inflation pressure is between 19 psi (130 kPa, 1.3 kgf/cm

2

or bar) and a

point below the specified level: The tire can be repaired. Proceed to step

22

.

C

If the tire inflation pressure is at the specified level: Proceed to step

23

.

Even if the tire inflation pressure is at the recommended level, the tire pressure
warning light may come on/flash.

22

Turn the compressor switch on to inflate the tire until the specified tire inflation
pressure is reached. Drive for about 3 miles (5 km) and then perform step

20

.

23

Attach the air release cap to the end of the hose.

If the air release cap is not attached, the sealant may leak and dirty the interior of the
vehicle or ones clothes.

9-4. If a tire is flat

609

9

When tr

ouble arises

24

Store the bottle in the luggage compartment while it is connected to the
compressor.

25

Taking precautions to avoid sudden braking, sudden acceleration and sharp
turns, drive carefully at under 50 mph (80 km/h) to your Lexus dealer that is
less than 100 km (62 miles) away for tire repair or replacement.

When having the tire repaired or replaced, make sure to tell the Lexus dealer that the
sealant is injected.
After using the emergency tire puncture repair kit, have the vehicle inspected and the
tire pressure warning valve and transmitter replaced by your Lexus dealer. Otherwise
the tire inflation pressure may not be able to be measured correctly.

Related Links

Function and operation of the power outlet (12 VDC)(P. 289)
Checking the specified tire inflation pressure(P. 545)

Decreasing the tire inflation pressure when a tire is overinflated

1

Disconnect the hose from the valve.

2

Install the air release cap to the end of the hose and push the protrusion on the
air release cap into the valve to let some air out.

3

Disconnect the hose from the valve, remove the air release cap from the hose
and then reconnect the hose.

4

Turn the compressor switch on for a few seconds and then turn it off and check
the tire inflation pressure.

If the air pressure is lower than the specified level, turn the compressor switch on again
and repeat the inflation procedure until the specified pressure is reached.

9-4. If a tire is flat

610

Replacing a tire with a spare tire (vehicles with a spare tire)

Your vehicle is equipped with a spare tire. The flat tire can be replaced with the
spare tire.

WARNING

Do not continue driving with a flat tire.
Driving even a short distance with a flat tire can damage the tire and the wheel beyond
repair, which could result in an accident.

Preparation for lifting the vehicle with a jack

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 engine.

●

Turn on the emergency flashers.

Storage position of the spare tire/tools/jack

A

Jack

WARNING

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

9-4. If a tire is flat

611

9

When tr

ouble arises