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LEXUS NX 300 (2019 year). Instruction - part 23

364

7-2. Steps to take in an emergency

LEXUS NX300 Owners Manu-

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the handle indicated by

until it does not

move anymore, stow the jack and the
cover, and press on the jack to fix with the
rubber band.

Remove deck under tray.

Loosen the center fastener that
secures the spare tire.

Chock the tires.

Slightly loosen the wheel nuts (one
turn).

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

The jack point guides are located under

the rocker panel. They indicate the jack

Taking out the spare tire

WARNING

■

When storing the spare tire

Be careful not to catch fingers or other

body parts between the spare tire and

the body of the vehicle.

Replacing a flat tire

Flat tire

Wheel chock positions

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

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7-2. Steps to take in an emergency

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When trouble

ari

ses

point positions.

Install the wheel nut wrench in jack
handle.

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

Remove all the wheel nuts and the
tire.

When resting the tire on the ground, place

the tire so that the wheel design faces up to

avoid scratching the wheel surface.

WARNING

■

Replacing a flat tire

●

Observe the following precautions.

Failure to do so may result in serious

injury:

• Do not try to remove the wheel orna-

ment by hand. Take due care in han-

dling 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.

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7-2. Steps to take in an emergency

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Remove any dirt or foreign matter
from the wheel contact surface.

If foreign matter is on the wheel contact

surface, the wheel nuts may loosen while

the vehicle is in motion, causing the tire to

come off.

Install the spare tire and loosely
tighten each wheel nut by hand by
approximately the same amount.

Tighten the wheel nuts until the tapered
portion

comes into loose contact with

the disc wheel seat

Install the wheel nut wrench in jack
handle.

WARNING

●

Failure to follow these precautions

could cause the wheel nuts to loosen

and the tire to fall off, resulting in death

or serious injury.

• Never use oil or grease on the wheel

bolts or wheel nuts.

Oil and grease may cause the wheel

nuts to be excessively tightened, lead-

ing to bolt or disc wheel damage. In

addition, the oil or grease can cause

the wheel nuts to loosen and the wheel

may fall off, causing a serious accident.

Remove any oil or grease from the

wheel bolts or wheel nuts.

• Have the wheel nuts tightened with a

torque wrench to 76 ft • lbf (103 N •m,

10.5 kgf •m) as soon as possible after

changing wheels.

• When installing a tire, only use wheel

nuts that have been specifically

designed for that wheel.

• If there are any cracks or deformations

in the bolt screws, nut threads or bolt

holes of the wheel, have the vehicle

inspected by your Lexus dealer.

• Do not attach a heavily damaged

wheel ornament, as it may fly off the

wheel while the vehicle is moving.

■

Replacing a flat tire for vehicles with

power back door

In cases such as when replacing tires,

make sure to turn off the power back

door system (

P.103). Failure to do so

may cause the back door to operate

unintentionally if the power back door

switch is accidentally touched, resulting

in hands and fingers being caught and

injured.

Installing the spare tire

367

7-2. Steps to take in an emergency

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When trouble

ari

ses

Lower the vehicle.

Firmly tighten each wheel nut two
or three times in the order shown in
the illustration.

Tightening torque:

76 ft· lbf (103 N· m, 10.5 kgf· m)

Stow the flat tire, tire jack and all
tools.

■

The compact spare tire

●

The compact spare tire is identified by the

label “TEMPORARY USE ONLY” on

the tire sidewall.

Use the compact spare tire temporarily,

and only in an emergency.

●

Make sure to check the tire inflation pres-

sure of the compact spare tire. (

P.387)

■

After completing the tire change

The tire pressure warning system must be

reset. (

P.326)

■

When using the compact spare tire

As the compact spare tire is not equipped

with a tire pressure warning valve and trans-

mitter, low inflation pressure of the spare

tire will not be indicated by the tire pressure

warning system. Also, if you replace the

compact spare tire after the tire pressure

warning light comes on, the light remains

on.

■

When the compact spare tire is

equipped

The vehicle becomes lower when driving

with the compact spare tire compared to

when driving with standard tires.

■

If you have a flat front tire on a road cov-

ered with snow or ice

Install the compact spare tire on one of the

rear wheels of the vehicle. Perform the fol-

lowing steps and fit tire chains to the front

tires:

Replace a rear tire with the compact

spare tire.

Replace the flat front tire with the tire

removed from the rear of the vehicle.

Fit tire chains to the front tires.

WARNING

■

When using the compact spare tire

●

Remember that the spare tire provided

is specifically designed for use with

your vehicle. Do not use your spare

tire on another vehicle.

●

Do not use more than one spare tire

simultaneously.

●

Replace the spare tire with a standard

tire as soon as possible.

●

Avoid sudden acceleration, abrupt

steering, sudden braking and shifting

operations that cause sudden engine

braking.

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7-2. Steps to take in an emergency

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WARNING

■

When the compact spare tire is

attached

The vehicle speed may not be correctly

detected, and the following systems may

not operate correctly:
• ABS & Brake assist
• VSC
• TRAC
• Dynamic radar cruise control with full-

speed range

• PCS (Pre-Collision System)
• EPS
• AVS (Adaptive Variable Suspension

system) (if equipped)

• LDA (Lane Departure Alert with

steering control)

• Panoramic view monitor (if equipped)
• Lexus parking assist monitor (if

equipped)

• Intuitive parking assist (if equipped)
• Navigation system (if equipped)
• BSM (Blind spot monitor) (if

equipped)

• Automatic high Beam (if equipped)
Also, not only can the following system

not be utilized fully, but it may even nega-

tively affect the drive-train components:
• AWD system (if equipped)

■

Speed limit when using the compact

spare tire

Do not drive at speeds in excess of 50

mph (80 km/h) when a compact spare

tire is installed on the vehicle.

The compact spare tire is not designed

for driving at high speeds. Failure to

observe this precaution may lead to an

accident causing death or serious injury.

■

After using the tools and jack

Before driving, make sure all the tools

and jack are securely in place in their

storage location to reduce the possibility

of personal injury during a collision or

sudden braking.

NOTICE

■

Be careful when driving over bumps

with the compact spare tire installed

on the vehicle

The vehicle becomes lower when driving

with the compact spare tire compared to

when driving with standard tires. Be

careful when driving over uneven road

surfaces.

■

Driving with tire chains and the com-

pact spare tire

Do not fit tire chains to the compact

spare tire.

Tire chains may damage the vehicle body

and adversely affect driving perfor-

mance.

■

When replacing the tires

When removing or fitting the wheels,

tires or the tire pressure warning valve

and transmitter, contact your Lexus

dealer as the tire pressure warning valve

and transmitter may be damaged if not

handled correctly.

369

7-2. Steps to take in an emergency

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When trouble

ari

ses

One of the following may be the cause
of the problem:
 There may not be sufficient fuel in

the vehicle’s tank.
Refuel the vehicle.

 The engine may be flooded.

Try to restart the engine again fol-
lowing correct starting proce-
dures.(

P.155)

 There may be a malfunction in the

engine immobilizer system.
(

P.58)

One of the following may be the cause
of the problem:
 The battery terminal connections

may be loose or corroded.

 The battery may be discharged.

(

P.374)

The engine starting system may be
malfunctioning due to an electrical
problem such as electronic key battery
depletion or a blown fuse. However, an
interim measure is available to start the
engine. (

P.369)

One of the following may be the cause
of the problem:
 One or both of the battery terminals

may be disconnected.

 The battery may be discharged.

(

P.374)

 There may be a malfunction in the

steering lock system.

Contact your Lexus dealer if the problem
cannot be repaired, or if repair procedures
are unknown.

When the engine does not start, the
following steps can be used as an
interim measure to start the engine if
the engine switch is functioning nor-
mally.
Do not use this starting procedure
except in cases of emergency.

Set the parking brake.

If the engine will not start

If the engine will not start even
though correct starting procedures
are being followed (

P.155), con-

sider each of the following points:

The engine will not start even
though the starter motor oper-
ates normally.

The starter motor turns over
slowly, the interior lights and
headlights are dim, or the horn
does not sound or sounds at a low
volume.

The starter motor does not turn
over

The starter motor does not turn
over, the interior lights and head-
lights do not turn on, or the horn
does not sound.

Starting the engine in an emer-
gency

370

7-2. Steps to take in an emergency

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Shift the shift lever to P.

Turn the engine switch to ACCES-
SORY mode.

Press and hold the engine switch
for about 15 seconds while
depressing the brake pedal firmly.

Even if the engine can be started using
the above steps, the system may be
malfunctioning. Have the vehicle
inspected by your Lexus dealer.

If you lose your keys

New genuine mechanical keys can
be made by your Lexus dealer using
another mechanical key and the
key number stamped on your key
number plate. Keep the plate in a
safe place such as your wallet, not in
the vehicle.

NOTICE

■

When an electronic key is lost

If the electronic key remains lost, the risk

of vehicle theft increases significantly.

Visit your Lexus dealer immediately with

all remaining electronic keys and the

card key that were provided with your

vehicle.

371

7-2. Steps to take in an emergency

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When trouble

ari

ses

Remove the cover inside the lug-
gage compartment by inserting a
screwdriver.
When removing the cover, to pre-
vent damage, cover the tip of the
screwdriver with a rag.

After removing the cover, pull the
lever to unlock the fuel filler door
and it will be ready to open as usual.

■

Things to check before taking measures

●

Make sure that the smart access system

with push-button start has not been deac-

tivated in the customization setting. If it is

off, turn the function on.

●

Check if battery-saving mode is set. If it is

set, cancel the function. (

P.107)

Use the mechanical key (

P.88) to

perform the following operations.

If the fuel filler door cannot
be opened

If the fuel filler door opener switch
cannot be operated, the following
procedure can be used to open the
fuel filler door.

Opening the fuel filler door

If the electronic key does not
operate properly

If communication between the
electronic key and vehicle is inter-
rupted (

P.107) or the electronic

key cannot be used because the
battery is depleted, the smart
access system with push-button
start and wireless remote control
cannot be used. In such cases, the
doors can be opened and the
engine can be started by following
the procedure below.

NOTICE

■

In case of a smart access system with

push-button start malfunction or

other key related problems

Take your vehicle with all the electronic

keys provided with your vehicle, includ-

ing the card key, to your Lexus dealer.

Locking and unlocking the doors

372

7-2. Steps to take in an emergency

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■

Unlocking the door

Insert the mechanical key while
pulling on the driver’s door handle.

Turn the key in order to perform the
following operations.

Unlocking the door
Opens the windows and moon
roof

(turn and hold)

Closes the windows and moon
roof

(turn and hold)

: This setting must be customized at your

Lexus dealer

Remove the key, return the handle,
and then pull the handle again.

■

Locking the door

Move the inside lock button to the
lock position.

Close the door.

Ensure that the shift lever is in P and
depress the brake pedal.

Touch the Lexus emblem side of the
electronic key to the engine switch.

When the electronic key is detected, a

buzzer sounds and the engine switch will

turn to IGNITION ON mode.

When the smart access system with push-

button start is deactivated in customization

setting, the engine switch will turn to

A
B

WARNING

■

When using the mechanical key and

operating the power windows or

moon roof

Operate the power window or moon

roof after checking to make sure that

there is no possibility of any passenger

having any of their body parts caught in

the window or moon roof.

Also, do not allow children to operate the

mechanical key. It is possible for children

and other passengers to get caught in

the power window or moon roof.

Starting the engine

373

7-2. Steps to take in an emergency

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When trouble

ari

ses

ACCESSORY mode.

Firmly depress the brake pedal and
check that message shown on the
multi-information display.

Press the engine switch.

In the event that the engine still cannot be

operated, contact your Lexus dealer.

■

Stopping the engine

Set the parking brake, shift the shift lever to

P and press the engine switch as you nor-

mally do when stopping the engine.

■

Electronic key battery

As the above procedure is a temporary

measure, it is recommended that the elec-

tronic key battery be replaced immediately

when the battery is depleted.

■

Alarm

Using the mechanical key to lock the doors

will not set the alarm system. If a door is

unlocked using the mechanical key when

the alarm system is set, the alarm may be

triggered.

■

Changing engine switch modes

Release the brake pedal and press the

engine switch in step

above.

The engine does not start and modes will be

changed each time the switch is pressed.

(

P.156)

374

7-2. Steps to take in an emergency

LEXUS NX300 Owners Manu-

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If you have a set of jumper (or booster)
cables and a second vehicle with a bat-
tery, you can jump start your vehicle by
following the steps below.

Confirm that the electronic key is
being carried.

When connecting the jumper (or booster)

cables, depending on the situation, the

alarm may activate and the doors may lock.

(

P.61)

Open the hood (

P.310)

If the vehicle battery is dis-
charged

The following procedures may be
used to start the engine if the vehi-
cle’s battery is discharged.
You can also call your Lexus dealer
or a qualified repair shop.

Restarting the engine

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7-2. Steps to take in an emergency

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When trouble

ari

ses

Connect a positive jumper cable clamp to   on your vehicle and connect the
clamp on the other end of the positive cable to   on the second vehicle. Then,
connect a negative cable clamp to   on the second vehicle and connect the
clamp at the other end of the negative cable to  .

Positive (+) battery terminal (your vehicle)
Positive (+) battery terminal (second vehicle)
Negative (-) battery terminal (second vehicle)
Solid, stationary, unpainted metallic point away from the battery and any mov-
ing parts as shown in the illustration

Start the engine of the second vehicle. Increase the engine speed slightly and
maintain at that level for approximately 5 minutes to recharge the battery of
your vehicle.

Open and close any of the doors of your vehicle with the engine switch off.

Maintain the engine speed of the second vehicle and start the engine of your
vehicle by turning the engine switch to IGNITION ON mode.

Once the vehicle’s engine has started, remove the jumper cables in the exact
reverse order from which they were connected.

Once the engine starts, have the vehicle inspected at your Lexus dealer as soon as
possible.

A
B
C
D

376

7-2. Steps to take in an emergency

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■

Starting the engine when the battery is

discharged

The engine cannot be started by push-start-

ing.

■

To prevent battery discharge

●

Turn off the headlights and the audio sys-

tem while the engine is off.

●

Turn off any unnecessary electrical com-

ponents when the vehicle is running at a

low speed for an extended period, such

as in heavy traffic.

■

Charging the battery

The electricity stored in the battery will dis-

charge gradually even when the vehicle is

not in use, due to natural discharge and the

draining effects of certain electrical appli-

ances. If the vehicle is left for a long time,

the battery may discharge, and the engine

may be unable to start. (The battery

recharges automatically during driving.)

■

When the battery is removed or dis-

charged

●

In some cases, it may not be possible to

unlock the doors using the smart access

system with push-button start when the

battery is discharged. Use the wireless

remote control or the mechanical key to

lock or unlock the doors.

●

The engine may not start on the first

attempt after the battery has recharged

but will start normally after the second

attempt. This is not a malfunction.

●

The engine switch mode is memorized by

the vehicle. When the battery is recon-

nected, the system will return to the

mode it was in before the battery was dis-

charged. Before disconnecting the bat-

tery, turn the engine switch off.

If you are unsure what mode the engine

switch was in before the battery dis-

charged, be especially careful when

reconnecting the battery.

●

Some systems may require initialization.

WARNING

■

Avoiding battery fires or explosions

Observe the following precautions to

prevent accidentally igniting the flamma-

ble gas that may be emitted from the bat-

tery:

●

Make sure each jumper cable is con-

nected to the correct terminal and that

it is not unintentionally in contact with

any other than the intended terminal.

●

Do not allow the other end of the

jumper cable connected to the “+” ter-

minal to come into contact with any

other parts or metal surfaces in the

area, such as brackets or unpainted

metal.

●

Do not allow the + and - clamps of the

jumper cables to come into contact

with each other.

●

Do not smoke, use matches, cigarette

lighters or allow open flame near the

battery.

■

Battery precautions

The battery contains poisonous and cor-

rosive acidic electrolyte, while related

parts contain lead and lead compounds.

Observe the following precautions when

handling the battery:

●

When working with the battery, always

wear safety glasses and take care not

to allow any battery fluids (acid) to

come into contact with skin, clothing

or the vehicle body.

●

Do not lean over the battery.

●

In the event that battery fluid comes

into contact with the skin or eyes,

immediately wash the affected area

with water and seek medical attention.

Place a wet sponge or cloth over the

affected area until medical attention

can be received.

377

7-2. Steps to take in an emergency

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When trouble

ari

ses

Stop the vehicle in a safe place and
turn off the air conditioning system,
and then stop the engine.

If you see steam:
Carefully lift the hood after the
steam subsides.
If you do not see steam:
Carefully lift the hood.

After the engine has cooled down
sufficiently, inspect the hoses and

WARNING

●

Always wash your hands after handling

the battery support, terminals, and

other battery-related parts.

●

Do not allow children near the battery.

NOTICE

■

When handling jumper cables

When connecting the jumper cables,

ensure that they do not become entan-

gled in the cooling fans or engine drive

belt.

If your vehicle overheats

The following may indicate that
your vehicle is overheating.
 The needle of the engine coolant

temperature gauge (

P.69)

enters the red zone, or a loss of
engine power is experienced.
(For example, the vehicle speed
does not increase.)

 “Engine Coolant Temp High” is

shown on the multi-information
display.

 Steam comes out from under the

hood.

Correction procedures

378

7-2. Steps to take in an emergency

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radiator core (radiator) for any
leaks.

Radiator
Cooling fans

If a large amount of coolant leaks, immedi-
ately contact your Lexus dealer.

The coolant level is satisfactory if it
is between the “FULL” and “LOW”
lines on the reservoir.



Engine

Reservoir
“FULL” line
“LOW” line



Intercooler radiator

Reservoir
“FULL” line
“LOW” line

Add coolant if necessary.



Engine

Water can be used in an emergency if
coolant is unavailable.



Intercooler radiator

Water can be used in an emergency if
coolant is unavailable.

A
B

A
B
C

379

7-2. Steps to take in an emergency

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When trouble

ari

ses

Start the engine and turn the air
conditioning system on to check
that the radiator cooling fans oper-
ate and to check for coolant leaks
from the radiator or hoses.

The fans operate when the air conditioning

system is turned on immediately after a

cold start. Confirm that the fans are oper-

ating by checking the fan sound and air

flow. If it is difficult to check these, turn the

air conditioning system on and off repeat-

edly.

(The fans may not operate in freezing tem-

peratures.)

If the fans are not operating:
Stop the engine immediately and
contact your Lexus dealer.
If the fans are operating:
Have the vehicle inspected at the
nearest Lexus dealer.

Check if “Engine Coolant Temp
High” is shown on the multi-infor-
mation display.
If the message does not disappear:
Stop the engine and contact your
Lexus dealer.
If the message is not displayed:
Have the vehicle inspected at the
nearest Lexus dealer.

WARNING

■

To prevent an accident or injury when

inspecting under the hood of your

vehicle

Observe the following precautions.

Failure to do so may result in serious

injury such as burns.

●

If steam is seen coming from under the

hood, do not open the hood until the

steam has subsided. The engine com-

partment may be very hot.

●

Do not touch within the engine com-

partment or get close when the cool-

ing fan is operating. Body parts,

clothes, etc., may get caught and lead

to an accident, resulting in serious

injury. The cooling fan operates auto-

matically at times when the air condi-

tioner is operating and times when the

coolant temperatures are high. Also, it

may operate for several minutes even

after the engine switch is turned off.

●

Keep hands and clothing (especially a

tie, a scarf or a muffler) away from the

fans and belts. Failure to do so may

cause the hands or clothing to be

caught, resulting in serious injury.

●

Do not loosen the coolant reservoir

cap while the engine and radiator are

hot.

High temperature steam or coolant

could spray out.

NOTICE

■

When adding engine coolant

Add coolant slowly after the engine has

cooled down sufficiently. Adding cool

coolant to a hot engine too quickly can

cause damage to the engine.

■

To prevent damage to the cooling sys-

tem

Observe the following precautions:

●

Avoid contaminating the coolant with

foreign matter (such as sand or dust,

etc.).

●

Do not use any coolant additive.

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