Lexus RC350 (2022 year). Manual in english - page 18

298

7-2. Steps to take in an emergency

The rear passengers’ seat belt warning buzzer sounds to alert the rear passenger that his or

her seat belt is not fastened. If the seat belt is unfastened, the buzzer sounds intermit-
tently for a certain period of time, after the seat belt is fastened and unfastened and the
vehicle reaches a certain speed.

■

Master warning light (warning buzzer)

■

Tire pressure warning light

■

Parking brake indicator (warning buzzer)

Warning light

Details/Actions

A buzzer sounds and the warning light comes on and flashes to indicate
that the master warning system has detected a malfunction.



P.301

Warning light

Details/Actions

When the light comes on:
Low tire inflation pressure such as



Natural causes (



P.299)



Flat tire (



P.305)



Adjust the tire inflation pressure to the specified level. The light will
turn off after a few minutes. In case the light does not turn off even if
the tire inflation pressure is adjusted, have the system checked by
your Lexus dealer.

When the light comes on after blinking for 1 minute:
Malfunction in the tire pressure warning system



Have the system checked by your Lexus dealer.

Warning light

Details/Actions

(flashes)

(U.S.A.)

(flashes)

(Canada)

It is possible that the parking brake is not fully engaged or released



Operate the parking brake switch once again.

This light comes on when the parking brake is not released. If the light
turns off after the parking brake is fully released, the system is operating
normally.

299

7-2. Steps to take in an emergency

When trouble

ari

ses

■

Brake hold operated indicator (warning buzzer)

■

SRS warning light

This warning light system monitors the air-

bag sensor assembly, front impact sensors,

side impact sensors (door), side impact

sensors (front), side impact sensors (rear),

driver’s seat position sensor, driver’s seat

belt buckle switch, front passenger occu-

pant classification system, “AIR BAG ON”

indicator light, “AIR BAG OFF” indicator

light, front passenger’s seat belt buckle

switch, seat belt pretensioners, airbags,

interconnecting wiring and power sources.

(



P.29)

■

Front passenger detection sensor, seat

belt reminder and warning buzzer

●

If luggage is placed on the front passen-

ger seat, the front passenger detection

sensor may cause the warning light to

flash and the warning buzzer to sound

even if a passenger is not sitting in the

seat.

●

If a cushion is placed on the seat, the sen-

sor may not detect a passenger, and the

warning light may not operate properly.

■

If the malfunction indicator lamp comes

on while driving

First check the following:

●

Is the fuel tank empty?

If it is, fill the fuel tank immediately.

●

Is the fuel tank cap loose?

If it is, tighten it securely.

The light will go off after several driving

trips.
If the light does not go off even after several

trips, contact your Lexus dealer as soon as

possible.

■

Electric power steering system warning

light (warning buzzer)

When the battery charge becomes insuffi-

cient or the voltage temporarily drops, the

electric power steering system warning

light may come on and the warning buzzer

may sound.

■

When the tire pressure warning light

comes on

Check the tire inflation pressure and adjust

to the appropriate level. Pushing the tire

pressure warning reset switch will not turn

off the tire pressure warning light.

■

The tire pressure warning light may

come on due to natural causes

The tire pressure warning light may come

on due to natural causes such as natural air

leaks and tire inflation pressure changes

caused by temperature. In this case, adjust-

ing the tire inflation pressure will turn off the

warning light (after a few minutes).

■

When a tire is replaced with the spare

tire

The spare tire is not equipped with a tire

pressure warning valve and transmitter. If a

tire goes flat, the tire pressure warning light

will not turn off even though the flat tire has

been replaced with the spare tire.

■

Conditions that the tire pressure warn-

ing system may not function properly



P.266

■

If the tire pressure warning light fre-

quently comes on after blinking for 1

minute

If the tire pressure warning light frequently

comes on after blinking for 1 minute when

the engine switch is turned to IGNITION

ON mode, have it checked by your Lexus

dealer.

■

Warning buzzer

In some cases, the buzzer may not be heard

due to being in a noisy location or audio

sound.

Warning light

Details/Actions

(flashes)

Indicates a malfunction in the brake hold system



Have the vehicle inspected by your Lexus dealer immediately.

300

7-2. Steps to take in an emergency

WARNING

■

If both the ABS and the brake system

warning lights remain on

Stop your vehicle in a safe place immedi-

ately and contact your Lexus dealer. The

vehicle will become extremely unstable

during braking, and the ABS system may

fail, which could cause an accident

resulting in death or serious injury.

■

When the electric power steering

system warning light comes on

The steering wheel may become

extremely heavy.

When steering wheel operations are

heavier than usual, grip the steering

wheel firmly and operate it using more

force than usual.

■

If the tire pressure warning light

comes on

Be sure to observe the following precau-

tions. Failure to do so could cause a loss

of vehicle control and result in death or

serious injury.

●

Stop your vehicle in a safe place as

soon as possible. Adjust the tire infla-

tion pressure immediately.

●

If the tire pressure warning light comes

on even after tire inflation pressure

adjustment, it is probable that you have

a flat tire. Check the tires. If a tire is flat,

change it with the spare tire and have

the flat tire repaired by the nearest

Lexus dealer.

●

Avoid abrupt maneuvering and brak-

ing. If the vehicle tires deteriorate, you

could lose control of the steering

wheel or the brakes.

■

If a blowout or sudden air leakage

should occur

The tire pressure warning system may

not activate immediately.

■

Maintenance of the tires

Each tire, including the spare (if pro-

vided), should be checked monthly when

cold and inflated to the inflation pressure

recommended by the vehicle manufac-

turer on the vehicle placard or tire infla-

tion pressure label (tire and load

information label). (If your vehicle has

tires of a different size than the size indi-

cated on the vehicle placard or tire infla-

tion pressure label [tire and load

information label], you should determine

the proper tire inflation pressure for

those tires.)

As an added safety feature, your vehicle

has been equipped with a tire pressure

monitoring system (TPMS-tire pressure

warning system) that illuminates a low

tire pressure telltale (tire pressure warn-

ing light) when one or more of your tires

is significantly under-inflated. Accord-

ingly, when the low tire pressure telltale

(tire pressure warning light) illuminates,

you should stop and check your tires as

soon as possible, and inflate them to the

proper pressure. Driving on a signifi-

cantly under-inflated tire causes the tire

to overheat and can lead to tire failure.

Under-inflation also reduces fuel effi-

ciency and tire tread life, and may affect

the vehicle’s handling and stopping abil-

ity.

Please note that the TPMS (tire pressure

warning system) is not a substitute for

proper tire maintenance, and it is the

driver’s responsibility to maintain correct

tire pressure, even if under-inflation has

not reached the level to trigger illumina-

tion of the TPMS low tire pressure telltale

(tire pressure warning light).

301

7-2. Steps to take in an emergency

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WARNING

Your vehicle has also been equipped with

a TPMS (tire pressure warning system)

malfunction indicator to indicate when

the system is not operating properly. The

TPMS (tire pressure warning system)

malfunction indicator is combined with

the low tire pressure telltale (tire pres-

sure warning light). When the system

detects a malfunction, the telltale will

flash for approximately one minute and

then remain continuously illuminated.

This sequence will continue upon subse-

quent vehicle start-ups as long as the

malfunction exists. When the malfunction

indicator is illuminated, the system may

not be able to detect or signal low tire

pressure as intended.

TPMS (tire pressure warning system)

malfunctions may occur for a variety of

reasons, including the installation of

replacement or alternate tires or wheels

on the vehicle that prevent the TPMS

(tire pressure warning system) from func-

tioning properly. Always check the

TPMS (tire pressure warning system)

malfunction telltale after replacing one

or more tires or wheels on your vehicle to

ensure that the replacement or alternate

tires and wheels allow the TPMS (tire

pressure warning system) to continue to

function properly.

NOTICE

■

To ensure the tire pressure warning

system operates properly

Do not install tires with different specifi-

cations or makers, as the tire pressure

warning system may not operate prop-

erly.

If a warning message is dis-
played

The multi-information display
shows warnings of system malfunc-
tions, incorrectly performed opera-
tions, and messages that indicate a
need for maintenance. When a
message is shown, perform the cor-
rection procedure appropriate to
the message.



Except F SPORT models

Master warning light

The master warning light also comes on
or flashes in order to indicate that a mes-
sage is currently being displayed on the
multi-information display.

Multi-information display

Follow the instructions of the message
on the multi-information display.
If any of the warning messages are
shown again after the following actions
have been performed, contact your
Lexus dealer.

302

7-2. Steps to take in an emergency



F SPORT models (main meter in
center position)

Master warning light

The master warning light also comes on
or flashes in order to indicate that a mes-
sage is currently being displayed on the
multi-information display.

Multi-information display

Follow the instructions of the message
on the multi-information display.
If any of the warning messages are
shown again after the following actions
have been performed, contact your
Lexus dealer.



F SPORT models (main meter
moved to the right)

Master warning light

The master warning light also comes on
or flashes in order to indicate that a mes-
sage is currently being displayed on the
multi-information display.

Multi-information display

Follow the instructions of the message
on the multi-information display.
If any of the warning messages are
shown again after the following actions
have been performed, contact your
Lexus dealer.

303

7-2. Steps to take in an emergency

When trouble

ari

ses

The warning lights and warning buzzers operate as follows depending on the con-
tent of the message. If a message indicates the need for inspection by a dealer, have
the vehicle inspected by your Lexus dealer immediately.



In some situations, the master warning light and warning buzzer may not oper-
ate as specified. In this case, follow the instructions displayed in the warning
message.



If a warning light comes on or flashes at the same time that a warning message is
displayed, take corrective action according to the warning light. (



P.293)

: A buzzer sounds the first time a message is shown on the multi-information display.

■

Warning messages

The warning messages explained below

may differ from the actual messages

according to operation conditions and vehi-

cle specifications.

■

Warning buzzer

In some cases, the buzzer may not be heard

due to being in a noisy location or audio

sound.

■

If “Engine Oil Level Low Add or

Replace” is displayed

The engine oil level is low. Check the level

of the engine oil, and add if necessary.

This message may appear if the vehicle is

stopped on a slope. Move the vehicle to a

level surface and check to see if the mes-

sage disappears.

■

If a message that indicates the malfunc-

tion of front camera is displayed

The following systems may be suspended

until the problem shown in the message is

resolved. (



P.158, 296)

●

PCS (Pre-Collision System)

●

LDA (Lane Departure Alert with steering

control)

●

Automatic High Beam

●

Dynamic radar cruise control with

Messages and warnings

Warning buzzer

Warning

Comes on

Sounds

Indicates an important situation, such as when a sys-
tem related to driving is malfunctioning or that dan-
ger may result if the correction procedure is not
performed

Flashes

Sounds

Indicates a situation, such as when damage to the
vehicle or danger may result

Comes on

Does not sound

Indicates a condition, such as malfunction of electri-
cal components, their condition, or indicates the
need for maintenance

Flashes

Does not sound

Indicates a situation, such as when an operation has
been performed incorrectly, or indicates how to
perform an operation correctly

304

7-2. Steps to take in an emergency

full-speed range

■

If a message that indicates the malfunc-

tion of radar sensor is displayed

The following systems may be suspended

until the problem shown in the message is

resolved. P.158, 293

●

PCS (Pre-Collision System)

■

If “Maintenance Required Soon” is dis-

played

Indicates that all maintenance according to

the driven distance on the maintenance
schedule

should be performed soon.

Comes on approximately 4500 miles

(7200 km) after the message has been

reset. If necessary, perform maintenance.

Please reset the message after the mainte-

nance is performed. (



P.246)

: Refer to the separate “Scheduled Main-

■

If “Maintenance Required Visit Your

Dealer” is displayed

Indicates that all maintenance is required to

correspond to the driven distance on the
maintenance schedule

Comes on approximately 5000 miles

(8000 km) after the message has been

reset. (The indicator will not work properly

unless the message has been reset.) Per-

form the necessary maintenance. Please

reset the message after the maintenance is

performed. (



P.246)

: Refer to the separate “Scheduled Main-

■

If “Oil Maintenance Required Soon” is

displayed

Indicates that the engine oil is scheduled to

be changed. (The indicator will not work

properly unless the oil maintenance data

has been reset.)
Check the engine oil, and change if neces-

sary. After changing the engine oil, the oil

change system should be reset. (



P.258)

■

If “Oil Maintenance Required” is dis-

played

Indicates that the engine oil should be

changed. (After the engine oil is changed

and the oil maintenance data has been

reset.)
Check and change the engine oil, and oil fil-

ter by your Lexus dealer. After changing the

engine oil, the oil change system should be

reset. (



P.258)

■

If a message that indicates the need for

visiting your Lexus dealer is displayed

The system or part shown on the

multi-information display is malfunctioning.

Have the vehicle inspected by your Lexus

dealer immediately.

■

●

If the following messages are shown, fol-

lowing the instructions, accordingly.

• “Engine Coolant Temp High” (



P.320)

●

If any of the following messages are

shown on the multi-information display, it

may indicate a malfunction. Have the

vehicle inspected by your Lexus dealer

immediately.

• “Braking Power Low”

• “Access System with Elec. Key Malfunc-

tion”

●

If any of the following messages are

shown on the multi-information display, it

may indicate a malfunction. Immediately

stop the vehicle and contact your Lexus

dealer.

• “Oil Pressure Low”

• “Charging System Malfunction”

NOTICE

■

“High Power Consumption Partial

Limit On AC/Heater Operation” is

frequently shown

There is a possible malfunction relating

to the charging system or the battery

may be deteriorating. Have the vehicle

inspected by your Lexus dealer.

305

7-2. Steps to take in an emergency

n t

ris



Stop the vehicle in a safe place on a
hard, flat surface.



Set the parking brake.



Shift the shift lever to P.



Stop the engine.



Turn on the emergency flashers.
(



P.284)



Type A

Jack handle
Wheel nut wrench
Screwdriver
Towing eyelet

If you have a flat tire

Your vehicle is equipped with a
spare tire. The flat tire can be
replaced with the spare tire.

For details about tires:



P.263

WARNING

■

If you have a flat tire

Do not continue driving with a flat tire.

Driving even a short distance with a flat

tire can damage the tire and the wheel

beyond repair, which could result in an

accident.

Before jacking up the vehicle

Location of the spare tire, jack and tools

A
B
C
D

306

7-2. Steps to take in an emergency

Spare tire
Jack



Type B

Jack handle
Wheel nut wrench
Screwdriver
Towing eyelet
Spare tire
Jack

E
F

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 engine or drive the

vehicle while the vehicle is supported

by the jack.

307

7-2. Steps to take in an emergency

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Hold the hook and lift up the lug-
gage mat.

Secure the luggage mat using the
hook.

Remove the tool tray.

Take out the jack.

For tightening

For loosening

If the jack is too tightly installed to be
removed by hand, insert a tool, such as the
screwdriver included with the vehicle, into
the hole of the jack (portion

) and

loosen the jack.

Secure the luggage mat using the
hook. (



P.307)

WARNING

●

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.

●

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

NOTICE

■

To prevent damage to luggage mat

When closing the trunk lid, do not leave

the luggage mat lever hooked on the

edge of the trunk.

Taking out the spare tire

308

7-2. Steps to take in an emergency

Remove the tool tray.

Loosen the center fastener that
secures the spare tire.

If the center fastener cannot be turned by

hand, use the wheel nut wrench that is

stored in the trunk. (To secure the tire,

tighten the center fastener by hand. Do not

use the wrench or other tools.)

Chock the tires.

Slightly loosen the wheel nuts (one
turn).

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

The jack point guides are located under

the rocker panel. They indicate the jack

WARNING

■

When storing the spare tire

Be careful not to catch fingers or other

body parts between the spare tire and

the body of the vehicle.

Replacing a flat tire

Flat tire

Wheel chock posi-

tions

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

309

7-2. Steps to take in an emergency

n t

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point positions.

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

Remove all the wheel nuts and the
tire.

When resting the tire on the ground, place

the tire so that the wheel design faces up to

avoid scratching the wheel surface.

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, leading 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.

• Do not attach a heavily damaged

wheel ornament, as it may fly off the

wheel while the vehicle is moving.

• 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.

Installing the spare tire

310

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.

When replacing an aluminum wheel with a

steel wheel, tighten the wheel nuts until the
tapered portion

comes into loose con-

tact with the disc wheel seat

When replacing an aluminum wheel with

an aluminum wheel, turn the wheel nuts
until the washers

come into contact

with the disc wheel

Lower the vehicle.

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

Tightening torque:

76 ft•lbf (103 N•m, 10.5 kgf•m)

Stow the flat tire, tire jack and all
tools.

■

The spare tire

●

The spare tire is identified by the label

“TEMPORARY USE ONLY” on the tire

sidewall.

●

Use the spare tire temporarily, and only in

an emergency.

●

Make sure to check the tire inflation pres-

sure of the spare tire. (



P.332)

■

When using the spare tire

As the spare tire is not equipped with a tire

pressure warning valve and transmitter, low

inflation pressure of the spare tire will not be

indicated by the tire pressure warning sys-

tem. Also, if you replace the spare tire after

the tire pressure warning light comes on,

the light remains on.

311

7-2. Steps to take in an emergency

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■

When the spare tire is equipped

The vehicle becomes lower when driving

with the spare tire compared to when driv-

ing with standard tires.

■

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

ered with snow or ice (vehicles with

front and rear tires of the same size

except for vehicles with LDH and

19-inch tires)

Install the spare tire on one of the front

wheels of the vehicle. Perform the following

steps and fit tire chains to the rear tires:

Replace a front tire with the spare tire.

Replace the flat rear tire with the tire

removed from the front of the vehicle.

Fit tire chains to the rear tires.

WARNING

■

When using the 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.

■

When the 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

• EPS

• Adaptive Variable Suspension System

(if equipped)

• LDA (Lane Departure Alert with

steering control)

• VGRS (if equipped)

• LDH (Lexus Dynamic Handling sys-

tem) (if equipped)

• DRS (Dynamic Rear Steering) (if

equipped)

• VDIM (Vehicle Dynamics Integrated

Management)

• Tire pressure warning system

• Lexus parking assist monitor

• Intuitive parking assist (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 (if equipped)

■

Speed limit when using the spare tire

Do not drive at speeds in excess of 50

mph (80 km/h) when a spare tire is

installed on the vehicle.
The spare tire is not designed for driving

at high speeds. Failure to observe this

precaution may lead to an accident caus-

ing 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.

312

7-2. Steps to take in an emergency

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.125)



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



P.56)

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



The battery may be discharged.
(



P.317)



The battery terminal connections
may be loose or corroded.
(



P.261)

NOTICE

■

Driving with tire chains and the spare

tire

Do not fit tire chains to the 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.

If the engine will not start

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



P.125), 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.

313

7-2. Steps to take in an emergency

When trouble

ari

ses

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.313)

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



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



P.261)



The battery may be discharged.
(



P.317)



There may be a malfunction in the
steering lock system.

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

When the engine does not start, the
following steps can be used as an
interim measure to start the engine if
the engine switch is functioning nor-
mally:

Set the parking brake.

Shift the shift lever to P.

Turn the engine switch to ACCES-
SORY mode.

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

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

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.

Emergency start function

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