Content .. 24 25 26 27 ..

Lexus RX450h (2022 year). Manual in english - page 26

431

7-2. Steps to take in an emergency

n t

ris

Turn the jack handle counterclockwise

to lower the spare tire.

If the spare tire still cannot be lowered,

attempt to fully tighten the spare tire clamp

bolt again by turning the jack handle clock-

wise. Then turn it counterclockwise at least

2 turns to lower the spare tire.

If the spare tire still cannot be lowered, the

wire cable may be severed. Have the vehi-

cle inspected by your Lexus dealer.

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

WARNING

■

Replacing a flat tire

●

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.

●

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 an accident and

resulting in death or serious injury.

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.

●

Observe the following precautions.

(RX450hL)

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.

• Lower the spare tire completely to the

ground before removing it from under

the vehicle.

■

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.472). 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

432

7-2. Steps to take in an emergency

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.

Tapered portion
Disc wheel seat

Lower the vehicle.

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

For vehicles with wheel lock nuts, tighten

the wheel lock nut last.

Tightening torque:

76 ft•lbf (103 N•m, 10.5 kgf•m)

RX450h: Stow the flat tire, tire jack
and all tools.
RX450hL:



P.432

Remove the center wheel orna-
ment by pushing from the reverse
side.

Be careful not to lose the wheel ornament.

Stand the tire against the bumper
with the inner surface facing
toward you. Pass the hoist assembly

A
B

WARNING

■

Stowing the flat tire

Failure to follow steps listed under stow-

ing the tire may result in damage to the

spare tire carrier and loss of the tire,

which could result in serious injury or

death.

Stowing the flat tire, jack and all
tools (RX450hL)

433

7-2. Steps to take in an emergency

When trouble

ari

ses

and holding bracket through

the wheel opening.

Fully depress the secondary latch

and install the bracket to the

hoist assembly .

Lay the tire on the ground with the
outer surface (valve stem) facing
up.

Before raising the tire, make sure
that the hoist assembly is perpen-
dicular to the wheel opening. (Try to
place the tire directly beneath the
vehicle, near where the wire cable
is hanging from.)

Valve stem

Using the jack handle and adapter
socket, tighten the tire clamp bolt
by turning it clockwise until the tire
is in the correct position and two
clicks are heard as the jack handle
skips.

434

7-2. Steps to take in an emergency

Confirm it is not loose after tighten-
ing:

Push and pull the tire

Try rotating

Visually check to ensure tire is not hung on

surrounding parts.

If looseness or misassembly exists, repeat

steps

Repeat step

, any time the tire is

lowered or disturbed.

Stow the 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 emer-

gency.

●

Make sure to check the tire inflation pres-

sure of the compact spare tire. (



P.458)

■

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

When driving with the compact spare tire

installed, the vehicle height will be different

than 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 compact spare tire

provided is specifically designed for

use with your vehicle. Do not use your

compact spare tire on another vehicle.

●

Do not use more than one compact

spare tire simultaneously.

●

Replace the compact 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.

■

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

• Trailer Sway Control

• EPS

• VDIM

• Adaptive Variable Suspension System

(if equipped)

• Dynamic radar cruise control with

full-speed range

435

7-2. Steps to take in an emergency

n t

ris

WARNING

• PCS (Pre-Collision System)

• LTA (Lane Tracing Assist)

• RSA (Road Sign Assist) (if equipped)

• Automatic High Beam

• AFS (Adaptive Front-lighting System)

(if equipped)

• Tire pressure warning system

• Intuitive parking assist (if equipped)

• PKSB (Parking Support Brake) (if

equipped)

• Lexus parking assist monitor (if

equipped)

• Panoramic view monitor (if equipped)

• BSM (Blind Spot Monitor) (if

equipped)

• Navigation system (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

performance.

■

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.

■

When stowing the flat tire

(RX450hL)

●

Ensure that there is no object caught

between the tire and the vehicle

underbody.

●

Securely tighten the spare tire clamp

bolt to hold the spare wheel carrier by

the hook.

●

Stow the flat tire in the spare tire loca-

tion. Failure to do so may cause dam-

age to the spare tire carrier. Proper

storage reduces the possibility of injury

in a collision or during sudden braking.

●

Have the flat tire repaired and the

spare tire replaced with it as soon as

possible.

436

7-2. Steps to take in an emergency

One of the following may be the cause
of the problem:



The electronic key may not be func-
tioning properly. (



P.439)



There may not be sufficient fuel in
the vehicle’s tank.
Refuel the vehicle.



There may be a malfunction in the
immobilizer system. (



P.73)



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.437)

One of the following may be the cause

NOTICE

■

Proper storage of the spare tire

(RX450hL)

●

If the hoist assembly is slanted when

stowing a tire, the hoist assembly may

become stuck in the wheel opening

and the tire may not be raised properly,

causing damage to the wheel or the

wire cable.

●

If the spare tire clamp bolt is turned

without a tire on the hoist assembly, the

wire cable may not be able to be low-

ered. If the wire cable cannot be low-

ered, contact your Lexus dealer.

If the hybrid system will not
start

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

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



P.182)

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

437

7-2. Steps to take in an emergency

When trouble

ari

ses

of the problem:



The 12-volt battery may be dis-
charged. (



P.441)



The 12-volt battery terminal con-
nections may be loose or corroded.
(



P.370)

One of the following may be the cause
of the problem:



One or both of the 12-volt battery
terminals may be disconnected.
(



P.370)



The 12-volt battery may be dis-
charged. (



P.441)

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.

Turn the power switch to ON mode
and check that the parking brake is
set. (



P.185, 193)

Shift the shift lever to P.

Turn the power switch to ACCES-
SORY mode.

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.

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

Starting the hybrid system in an
emergency

438

7-2. Steps to take in an emergency



RX450h



If the fuel filler door opener switch
cannot be operated, contact your
Lexus dealer to service the vehicle.
In case where refueling is urgently
necessary, the fuel filler door can be
opened using the lever in the lug-
gage compartment.



Using the lever to open the fuel filler
door may not allow for an adequate
reduction in fuel tank pressure
before refueling. To prevent fuel
from spilling out, turn the cap slowly
when removing it.
During refueling, fuel may spill out
from the filler opening due to air
being discharged from inside the

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 that were

provided with your vehicle.

If the fuel filler door cannot
be opened

If the fuel filler door opener switch
cannot be operated, contact your
Lexus dealer to service the vehicle.
In case where refueling is urgently
necessary, the following procedure
can be used to open the fuel filler
door.

Opening the fuel filler door

439

7-2. Steps to take in an emergency

n t

ris

fuel tank. Therefore, fill the fuel tank
carefully and slowly.



RX450hL



If the fuel filler door opener switch
cannot be operated, contact your
Lexus dealer to service the vehicle.
In case where refueling is urgently
necessary, remove the cover inside
the luggage compartment using a
tool, such as a flathead screwdriver,
and pull the lever to open the fuel
filler door.

When using a screwdriver, make sure to
wrap its tip with tape to protect the cover.



■

When the electronic key does not work

properly

●

Make sure that the smart access system

with push-button start has not been dis-

abled at your Lexus dealer. If it has been

disabled, re-enable it.

●

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

set, cancel the function. (



P.126)

■

Unlocking the door

Use the mechanical key (



P.107) in

order to perform the following opera-
tions:

If the electronic key does not
operate properly

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



P.126) 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 to your

Lexus dealer.

Locking and unlocking the doors

440

7-2. Steps to take in an emergency

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

Unlock the door.

Turning the key rearward unlocks the

driver’s door. Turning the key again unlocks

the other doors.

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

■

Locking the door

With the door open, push down the
inside lock button.

Close the door.

■

Key linked functions

Closes the windows and the moon
roof

or panoramic moon roof

(turn

and hold)

Opens the windows and the moon
roof

or panoramic moon roof

(turn

and hold)

These settings must be customized at your

Lexus dealer.

: If equipped

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

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.

WARNING

■

When using the mechanical key and

operating the power windows or the

moon roof or panoramic moon roof

Operate the power window or the moon

roof or panoramic 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

the moon roof or panoramic 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 the moon roof or

panoramic moon roof.

Starting the hybrid system

441

7-2. Steps to take in an emergency

When trouble

ari

ses

When the smart access system with

push-button start is deactivated in custom-

ization setting, the power switch will turn to

ACCESSORY mode.

Firmly depress the brake pedal and
check that

is shown on the

multi-information display.

Press the power switch shortly and
firmly.

In the event that the hybrid system still
cannot be started, contact your Lexus
dealer.

■

Stopping the hybrid system

Shift the shift lever to P, set the parking

brake, and press the power switch as you

normally do when stopping the hybrid sys-

tem.

■

Replacing the 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. (



P.386)

■

Alarm (For Canada)

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. (



P.74)

■

Changing power switch modes

Release the brake pedal and press the

power switch in step

above. The hybrid

system does not start and modes will be

changed each time the switch is pressed.

(



P.185)

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.

442

7-2. Steps to take in an emergency

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.

Confirm that the electronic key is
being carried.

When connecting the jumper (or booster)

cables, depending on the situation, the

alarm may activate and doors locked.

(



P.75)

Open the hood (



P.363) and fuse

box cover.

Open the exclusive jump starting
terminal cover.

Remove the engine cover.

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,

Restarting the hybrid system

443

7-2. Steps to take in an emergency

When trouble

ari

ses

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

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

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

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

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

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

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.

■

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-

A
B
C
D

444

7-2. Steps to take in an emergency

ponents when the vehicle is running at a

low speed for an extended period, such

as in heavy traffic.

■

When removing the 12-volt battery ter-

minals

When the 12-volt battery terminals are

removed, the information stored in the

ECU is cleared. Before removing the

12-volt battery terminals, contact your

Lexus dealer.

■

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.

●

The power back door must be initialized.

(



P.119)

■

When replacing the 12-volt battery

●

RX450h: Use a Central Degassing type

12-volt battery (European Regulations).

RX450hL: Use a 12-volt battery

designed for this vehicle.

●

RX450h: 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 per-

formance rating (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 the hybrid system

may not be able to start.

●

Use a 12-volt battery with a handle. If a

12-volt battery without a handle is used,

removal is more difficult.

●

After replacing, firmly attach the follow-

ing items to the exhaust hole of the

12-volt battery.

• Use the exhaust hose that was attached

to the 12-volt battery before replacing

and confirm that it is firmly connected to

the hole section of the vehicle.

• Use the exhaust hole plug included with

the 12-volt battery replaced or the one

installed on the 12-volt battery prior to

the replacement. (Depending on the

12-volt battery to be replaced, the

exhaust hole may be plugged.)



RX450h

Exhaust hole plug
Exhaust hole

A
B

445

7-2. Steps to take in an emergency

n t

ris

Exhaust hose
Hole section of the vehicle



RX450hL

Exhaust hole
Exhaust hose
Hole section of the vehicle

●

For details, consult your Lexus dealer.

WARNING

■

When removing the 12-volt battery

terminals

Always remove the negative (-) terminal

first. If the positive (+) terminal contacts

any metal in the surrounding area when

the positive (+) terminal is removed, a

spark may occur, leading to a fire in addi-

tion to electrical shocks and death or

serious injury.

■

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.

C
D

A
B
C

●

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 replacing the 12-volt battery

●

When the vent plug and indicator are

close to the hold down clamp, the bat-

tery fluid (sulfuric acid) may leak.

●

For information regarding 12-volt bat-

tery replacement, contact your Lexus

dealer.

446

7-2. Steps to take in an emergency



“Engine Coolant Temp High Stop in
a Safe Place See Owner’s Manual”
is shown on the multi-information
display

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

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

After the hybrid system has cooled
down sufficiently, inspect the hoses

WARNING

●

Make sure to replace the 12-volt bat-

tery with one designed for this vehicle.

Otherwise, hydrogen gas may enter

the vehicle, possibly causing a fire or

explosion.

●

After replacing, securely attach the

exhaust hose and exhaust hole plug to

the exhaust hole of the replaced

12-volt battery. If not properly installed,

gases (hydrogen) may leak into the

vehicle interior, and there is the possi-

ble danger 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.

If your vehicle overheats

The following may indicate that
your vehicle is overheating.



The needle of the engine coolant
temperature gauge (



P.83)

enters the red zone, or a loss of
hybrid system power is experi-
enced. (For example, the vehicle
speed does not increase.)



“Engine Coolant Temp High Stop
in a Safe Place See Owner’s
Manual” or “Hybrid System
Overheated Output power
reduced” is shown on the
multi-information display.



Steam comes out from under the
hood.

Correction procedures

Content .. 24 25 26 27 ..