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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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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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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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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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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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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■

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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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.