LEXUS NX 300H (2019 year). Instruction — part 24

380

7-2. Steps to take in an emergency

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Jack handle
Wheel nut wrench
Towing eyelet
Spare tire
Jack
Screwdriver

Location of the spare tire, jack and tools

A
B
C
D

E
F

WARNING

■

Using the tire jack

Observe the following precautions.

Improper use of the tire jack may cause

the vehicle to suddenly fall off the jack,

leading to death or serious injury.

●

Do not use the tire jack for any pur-

pose other than replacing tires or

installing and removing tire chains.

●

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.

●

Put the jack properly in its jack point.

●

Do not put any part of your body under

the vehicle while it is supported by the

jack.

●

Do not start the hybrid system or drive

the vehicle while the vehicle is sup-

ported by the jack.

●

Do not raise the vehicle while some-

one is inside.

●

When raising the vehicle, do not put an

object on or under the jack.

●

Do not raise the vehicle to a height

greater than that required to replace

the tire.

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7-2. Steps to take in an emergency

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1

Open the back door.

2

Pull the lever upwards and open the
deck board.

3

Lift the deck board and remove the
hook on the backside of the deck
board.

4

Use the hook to secure the deck
board as shown in the illustration.

5

Removing the Jack.

1

Remove the rubber band.

2

Remove the cover and the jack.

When stowing the jack, close it by turning

WARNING

●

Use a jack stand if it is necessary to get

under the vehicle.

●

When lowering the vehicle, make sure

that there is no-one near the vehicle. If

there are people nearby, warn them

vocally before lowering.

Taking out the jack

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7-2. Steps to take in an emergency

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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.

1

Remove deck under tray.

2

Loosen the center fastener that
secures the spare tire.

1

Chock the tires.

2

Slightly loosen the wheel nuts (one
turn).

3

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.

A

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

A

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point positions.

4

Install the wheel nut wrench in jack
handle.

5

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

6

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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1

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.

2

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

.

3

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 main switch (

P.117). 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

A

B

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7-2. Steps to take in an emergency

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4

Lower the vehicle.

5

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)

6

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.408)

■

After completing the tire change

The tire pressure warning system must be

reset. (

P.343)

■

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:

1

Replace a rear tire with the compact

spare tire.

2

Replace the flat front tire with the tire

removed from the rear of the vehicle.

3

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
• 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:
• E-Four

■

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.

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7-2. Steps to take in an emergency

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One of the following may be the cause
of the problem:
 The electronic key may not be func-

tioning properly. (

P.389)

 There may not be sufficient fuel in

the vehicle’s tank.
Refuel the vehicle. (

P.64)

 There may be a malfunction in the

immobilizer system. (

P.69)

 There may be a malfunction in the

steering lock system.

 The hybrid system may be malfunc-

tioning due to an electrical problem
such as electronic key battery
depletion or a blown fuse. However,
depending on the type of malfunc-
tion, an interim measure is available
to start the hybrid system.
(

P.387)

One of the following may be the cause
of the problem:
 The 12-volt battery may be dis-

charged. (

P.392)

 The 12-volt battery terminal con-

nections may be loose or corroded.
(

P.334)

One of the following may be the cause
of the problem:
 The 12-volt battery may be dis-

charged. (

P.392)

 One or both of the 12-volt battery

terminals may be disconnected.
(

P.334)

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

When the hybrid system does not start,
the following steps can be used as an
interim measure to start the hybrid sys-
tem if the power switch is functioning
normally.
Do not use this starting procedure
except in cases of emergency.

If the hybrid system will not
start

Reasons for the hybrid system not
starting vary depending on the situ-
ation.
Check the following and perform
the appropriate procedure:

The hybrid system will not start
even though the correct starting
procedure is being followed.
(

P.168)

The interior lights and head-
lights are dim, or the horn does
not sound or sounds at a low vol-
ume.

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

Starting the hybrid system in an
emergency

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7-2. Steps to take in an emergency

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1

Set the parking brake.

2

Shift the shift lever to P.

3

Turn the power switch to ACCES-
SORY mode.

4

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

Even if the hybrid system can be
started using the above steps, the sys-
tem 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.

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7-2. Steps to take in an emergency

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When trouble

ari

ses

1

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.

2

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.121)

Use the mechanical key (

P.102) 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.121) 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 hybrid
system 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

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7-2. Steps to take in an emergency

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■

Unlocking the door

1

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

2

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

3

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

■

Locking the door

1

Move the inside lock button to the
lock position.

2

Close the door.

1

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

2

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

When the electronic key is detected, a

buzzer sounds and the power switch will

turn to ON mode.

When the smart access system with push-

button start is deactivated in customization

setting, the power switch will turn to

A
B

C

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 hybrid system

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When trouble

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ACCESSORY mode.

3

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

4

Press the power switch.

In the event that the hybrid system still can-

not be operated, contact your Lexus

dealer.

■

Stopping the hybrid system

Set the parking brake, shift the shift lever to

P and press the power switch as you nor-

mally do when stopping the hybrid system.

■

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 power switch modes

Release the brake pedal and press the

power switch in step

3

above.

The hybrid system does not start and modes

will be changed each time the switch is

pressed. (

P.170)

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7-2. Steps to take in an emergency

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If you have a set of jumper (or booster)
cables and a second vehicle with a 12-
volt battery, you can jump start your
vehicle by following the steps below.

1

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.72)

2

Open the hood (

P.326) and fuse

box cover.

3

Open the exclusive jump starting
terminal cover.

4

Remove the engine cover.

If the 12-volt battery is dis-
charged

The following procedures may be
used to start the hybrid system if the
vehicle’s 12-volt battery is dis-
charged.
You can also call your Lexus dealer
or a qualified repair shop.

Restarting the hybrid system

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7-2. Steps to take in an emergency

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When trouble

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5

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 .

Exclusive jump starting terminal (your vehicle)
Positive (+) battery terminal (second vehicle)
Negative (-) battery terminal (second vehicle)
Solid, stationary, unpainted metallic point away from the exclusive jump starting
terminal and any moving parts as shown in the illustration

6

Start the engine of the second vehicle. Increase the engine speed slightly and
maintain at that level for approximately 5 minutes to recharge the 12-volt bat-
tery of your vehicle.

7

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

8

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

9

Make sure the “READY” indicator comes on. If the indicator light does not
come on, contact your Lexus dealer.

10

Once the hybrid system has started, remove the jumper cables in the exact
reverse order from which they were connected.

11

Close the exclusive jump starting terminal cover, and reinstall the fuse box
cover to its original position.

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

A

B

C

D

A
B
C
D

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7-2. Steps to take in an emergency

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■

Starting the hybrid system when the 12-

volt battery is discharged

The hybrid system cannot be started by

push-starting.

■

To prevent 12-volt battery discharge

●

Turn off the headlights and the audio sys-

tem while the hybrid system 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 12-volt battery

The electricity stored in the 12-volt battery

will discharge gradually even when the

vehicle is not in use, due to natural dis-

charge and the draining effects of certain

electrical appliances. If the vehicle is left for

a long time, the 12-volt battery may dis-

charge, and the hybrid system may be

unable to start. (The 12-volt battery

recharges automatically while the hybrid

system is operating.)

■

When the 12-volt battery is removed or

discharged

●

In some cases, it may not be possible to

unlock the doors using the smart access

system with push-button start when the

12-volt battery is discharged. Use the

wireless remote control or the mechani-

cal key to lock or unlock the doors.

●

The hybrid system may not start on the

first attempt after the 12-volt battery has

recharged but will start normally after the

second attempt. This is not a malfunction.

●

The power switch mode is memorized by

the vehicle. When the 12-volt battery is

reconnected, the system will return to the

mode it was in before the 12-volt battery

was discharged. Before disconnecting

the 12-volt battery, turn the power switch

off.

If you are unsure what mode the power

switch was in before the 12-volt battery

discharged, be especially careful when

reconnecting the 12-volt battery.

●

Some systems may require initialization.

■

When replacing the 12-volt battery

●

Use a 12-volt battery that the case size is

same as the previous one (LN2), 20 hour

rate capacity (20HR) is equivalent

(60Ah) or greater, and performance rat-

ing (CCA) is equivalent (460A) or

greater.

• If the sizes differ, the 12-volt battery can-

not be properly secured.

• If the 20 hour rate capacity is low, even if

the time period where the vehicle is not

used is a short time, the 12-volt battery

may discharge and hybrid system may

not be able to start.

●

After exchanging, firmly attach the fol-

lowing items to the exhaust hole of the 12-

volt battery.

• Use the exhaust hose

that was

attached to the 12-volt battery before
exchanging and confirm that it is firmly
connected to the hole section of the vehi-
cle.

• Use the exhaust hole plug

included

with the 12-volt battery exchanged or the
one installed on the battery prior to the
exchange. (Depending on the 12-volt
battery to be exchanged, the exhaust
hole

may be plugged.)

For details, consult your Lexus dealer.

C

A

B

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When trouble

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WARNING

■

Avoiding 12-volt battery fires or

explosions

Observe the following precautions to

prevent accidentally igniting the flamma-

ble gas that may be emitted from the 12-

volt battery:

●

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

12-volt battery.

■

12-volt Battery precautions

The 12-volt battery contains poisonous

and corrosive acidic electrolyte, while

related parts contain lead and lead com-

pounds. Observe the following precau-

tions when handling the 12-volt battery:

●

When working with the 12-volt 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 12-volt 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.

●

Always wash your hands after handling

the 12-volt battery support, terminals,

and other battery-related parts.

●

Do not allow children near the 12-volt

battery.

■

After recharging the 12-volt battery

Have the 12-volt battery inspected at

your Lexus dealer as soon as possible.

If the 12-volt battery is deteriorating, con-

tinued use may cause the 12-volt battery

to emit a malodorous gas, which may be

detrimental to the health of passengers.

■

When exchanging the 12-volt battery

After exchanging, securely attach the

exhaust hose and exhaust hole plug to

the exhaust hole of the exchanged 12-

volt battery. If not properly installed,

gases (hydrogen) may leak into the vehi-

cle interior, and there is the possible dan-

ger of the gas igniting and exploding.

NOTICE

■

When handling jumper cables

When connecting the jumper cables,

ensure that they do not become entan-

gled in the cooling fans or belt.

■

To prevent damaging the vehicle

The exclusive jump starting terminal is to

be used when charging the 12-volt bat-

tery from another vehicle in an emer-

gency. It cannot be used to jump start

another vehicle.