Lexus RX (2022 year). Manual in english — page 27

450

7-2. Steps to take in an emergency

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.

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.

451

7-2. Steps to take in an emergency

When trouble

ises

■

The compact spare tire (vehicles with a

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.477)

■

When using the compact spare tire

(vehicles with a 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 (vehicles with a compact

spare tire)

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 (vehicles with a

compact spare tire)

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.

452

7-2. Steps to take in an emergency

■

Certification for the jack

WARNING

■

When using the compact spare tire

(vehicles with a 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.

453

7-2. Steps to take in an emergency

When trouble

ises

WARNING

■

When the compact spare tire is

attached (vehicles with a compact

spare tire)

The vehicle speed may not be correctly

detected, and the following systems may

not operate correctly:

• ABS & Brake assist

• VSC

• TRC

• Trailer Sway Control

• EPS

• VDIM (if equipped)

• Adaptive Variable Suspension System

(if equipped)

• Cruise control (if equipped)

• Dynamic radar cruise control with

full-speed range (if equipped)

• PCS (Pre-Collision System)

• LTA (Lane Tracing Assist) (if equipped)

• RSA (Road Sign Assist) (if equipped)

• Automatic High Beam (if equipped)

• AHS (Adaptive High-beam System) (if

equipped)

• Tire pressure warning system

• Lexus parking assist-sensor (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:

• AWD system (AWD models)

■

Speed limit when using the compact

spare tire (vehicles with a compact

spare tire)

Do not drive at speeds in excess of 80

km/h (50 mph) 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 (vehicles with a com-

pact spare tire)

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 (vehicles with a 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.

454

7-2. Steps to take in an emergency

NOTICE

■

When replacing the tires

When removing or fitting the wheels,

tires or the tire pressure warning valve

and transmitter, contact any authorized

Lexus retailer or Lexus authorized

repairer, or any reliable repairer as the

tire pressure warning valve and transmit-

ter may be damaged if not handled cor-

rectly.

■

When stowing the flat tire (Type C)

●

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.

■

Proper storage of the spare tire (Type

●

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.

●

Do not attempt to turn the spare tire

clamp bolt without a tire on the hoist

assembly, as doing so may cause the

wire cable to slip off of the shaft inside

the unit and the wire cable may not be

able to be raised or lowered. If the

spare tire clamp bolt has been turned

without a tire on the hoist assembly

and the wire cable cannot be raised or

lowered, contact any authorized Lexus

retailer or Lexus authorized repairer,

or any reliable repairer.

455

7-2. Steps to take in an emergency

When trouble

ises

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 procedures.
(



P.177)



There may be a malfunction in the
engine immobilizer system.
(



P.63)

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



The battery may be discharged.
(



P.460)



The battery terminal connections
may be loose or corroded.
(



P.377)

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.455)

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



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



P.377)



The battery may be discharged.
(



P.460)



There may be a malfunction in the
steering lock system.

Contact any authorized Lexus retailer or
Lexus authorized repairer, or any reliable
repairer 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.

If the engine will not start

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



P.177), 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

456

7-2. Steps to take in an emergency

Turn the engine switch to IGNI-
TION ON mode and check that
the parking brake is set. (



P.179,

187)

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 any authorized Lexus
retailer or Lexus authorized repairer,
or any reliable repairer.

If you lose your keys

New genuine mechanical keys can
be made by any authorized Lexus
retailer or Lexus authorized
repairer, or any reliable repairer
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 any authorized Lexus retailer or

Lexus authorized repairer, or any reliable

repairer immediately with all remaining

electronic keys and the card key (if

equipped) that were provided with your

vehicle.

457

7-2. Steps to take in an emergency

When trouble

ises



RX300/RX350

If the fuel filler door cannot be opened
by pressing the rear edge of the fuel
filler door with the doors unlocked,
remove the cover inside the luggage
compartment and pull the lever to
open the fuel filler door.



RX350L

If the fuel filler door cannot be opened
by pressing its rear edge with the doors
unlocked, 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.

If the fuel filler door cannot
be opened

If the fuel filler door cannot be
opened by pressing the center of
the rear edge of the fuel filler door
with the doors unlocked, contact
any authorized Lexus retailer or
Lexus authorized repairer, or any
reliable repairer 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

458

7-2. Steps to take in an emergency

■

When the electronic key does not work

properly

●

Make sure that the smart entry & start

system has not been disabled using the

Remote Touch or at any authorized Lexus

retailer or Lexus authorized repairer, or

any reliable repairer. If it has been disa-

bled, re-enable it.

●

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

set, cancel the function. (



P.121)

■

Unlocking the door

Use the mechanical key (



P.98) in

order to perform the following opera-
tions:

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

Unlock the door.

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.



For the front doors

Close the door while pulling the
door handle.

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 entry
& start system and wireless remote
control cannot be used. In such
cases, the doors can be opened and
the engine can be started by follow-
ing the procedure below.

NOTICE

■

In case of a smart entry & start system

malfunction or other key-related

problems

Take your vehicle with all the electronic

keys provided with your vehicle, to any

authorized Lexus retailer or Lexus

authorized repairer, or any reliable

repairer.

Locking and unlocking the doors

459

7-2. Steps to take in an emergency

When trouble

ises



For the rear doors

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 any

authorized Lexus retailer or Lexus author-

ized repairer, or any reliable repairer.

: 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 engine switch.

When the electronic key is detected, a

buzzer sounds and the engine switch will

turn to IGNITION ON mode.
When the smart entry & start system is

deactivated in customization setting, the

engine switch will turn to ACCESSORY

mode.

Firmly depress the brake pedal and
check that

is shown on the

multi-information display.

Press the engine switch shortly and
firmly.

In the event that the engine still cannot
be started, contact any authorized
Lexus retailer or Lexus authorized
repairer, or any reliable repairer.

■

Stopping the engine

Shift the shift lever to P, set the parking

brake, and press the engine switch as you

normally do when stopping the engine.

■

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.393)

■

Alarm (if equipped)

Using the mechanical key to lock the doors

will not set the alarm system.

If a door is unlocked using the mechanical

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 engine

460

7-2. Steps to take in an emergency

key when the alarm system is set, the alarm

may be triggered. (



P.65)

■

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.179)

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 any authorized
Lexus retailer or Lexus authorized
repairer, or any reliable repairer.

461

7-2. Steps to take in an emergency

When trouble

ises

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.

Vehicles with an alarm: When connecting

the jumper (or booster) cables, depending

on the situation, the alarm may activate and

doors locked. (



P.66)

Open the hood. (



P.370)

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 .



RX300

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

Restarting the engine

A
B
C
D

462

7-2. Steps to take in an emergency



RX350/RX350L

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 battery of your vehi-
cle.

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 vehi-
cle inspected at any authorized Lexus
retailer or Lexus authorized repairer,
or any reliable repairer as soon as pos-
sible.

■

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 stopped. (Vehi-

cles with a Stop & Start system: Except

when the engine is stopped by the Stop &

Start system.)

●

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.

A
B
C
D

463

7-2. Steps to take in an emergency

When trouble

ises

■

When removing the battery terminals

When the battery terminals are removed,

the information stored in the ECU is

cleared. Before removing the battery termi-

nals, contact any authorized Lexus retailer

or Lexus authorized repairer, or any reliable

repairer as soon as possible.

■

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 entry &

start system when the battery is dis-

charged. 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.

●

Vehicles with power back door: The

power back door must be initialized.

(



P.114)

●

Vehicles with a Stop & Start system: After

the battery terminals have been discon-

nected then reconnected or the battery

has been replaced, the Stop & Start sys-

tem may not automatically stop the

engine for approximately 5 to 60 min-

utes.

■

Replacing the battery

●

Vehicles with Stop & Start system: Use a

genuine battery specifically designed for

use with the Stop & Start system or a bat-

tery with equivalent specifications to a

genuine battery. If an unsupported bat-

tery is used, Stop & Start system func-

tions may be restricted to protect the

battery. Also, battery performance may

decrease and the engine may not be able

to restart. Contact any authorized Lexus

retailer or Lexus authorized repairer, or

any reliable repairer for details.

●

Use a battery with the same case size as

the previous battery and an equivalent

20 hour rate capacity (20HR) or greater.

• If the sizes differ, the battery cannot 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 battery may dis-

charge and the engine may not be able to

start.

●

For details, consult any authorized Lexus

retailer or Lexus authorized repairer, or

any reliable repairer.

WARNING

■

When removing the 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 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.

464

7-2. Steps to take in an emergency

WARNING

●

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.

●

Always wash your hands after handling

the battery support, terminals, and

other battery-related parts.

●

Do not allow children near the battery.

■

When replacing the 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 battery

replacement, contact any authorized

Lexus retailer or Lexus authorized

repairer, or any reliable repairer.

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.

465

7-2. Steps to take in an emergency

When trouble

ises

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

radiator core (radiator) for any
leaks.

Radiator
Cooling fans

If a large amount of coolant leaks, immedi-
ately contact any authorized Lexus retailer
or Lexus authorized repairer, or any relia-
ble repairer.

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



Engine

Reservoir
“FULL” line
“LOW” line
Radiator cap

If your vehicle overheats

The following may indicate that
your vehicle is overheating.



The needle of the engine coolant
temperature gauge (



P.75)

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



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



Steam comes out from under the
hood.

Correction procedures

A
B

A
B
C
D

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