LEXUS GS 300 (2019 year). Instruction - part 28

440

7-2. Steps to take in an emergency

*

1

: Open door warning buzzer:

P. 444

*

2

: Driver’s seat belt buzzer:

The driver’s seat belt buzzer sounds to alert the driver that his or her seat belt is not

fastened. Once the engine switch is turned to IGNITION ON mode, the buzzer

sounds for 6 seconds. If the vehicle reaches a speed of 12 mph (20 km/h), the buzzer

sounds once. If the seat belt is still unfastened after 24 seconds, the buzzer will sound

intermittently for 10 seconds. Then, if the seat belt is still unfastened, the buzzer will

sound in a different tone for 20 more seconds.
Front passenger’s seat belt buzzer:
The front passenger’s seat belt buzzer sounds to alert the front passenger that his or

her seat belt is not fastened. The buzzer sounds once if the vehicle reaches a speed of

12 mph (20 km/h). If the seat belt is still unfastened after 24 seconds, the buzzer will

sound intermittently for 10 seconds. Then, if the seat belt is still unfastened, the buzzer

will sound in a different tone for 20 more seconds.

(If equipped)

LKA warning light

The warning light comes on and a warning message is displayed to

indicate that the LKA (Lane-Keeping Assist) system is not available

temporarily or has detected a malfunction.

 P. 454, 455

Warning light

Warning light/Details/Actions

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■

SRS warning light
This warning light system monitors the airbag sensor assembly, front impact sensors, side

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

driver’s seat position sensor, driver’s seat belt buckle switch, front passenger occupant

classification system, “AIR BAG ON” indicator light, “AIR BAG OFF” indicator light,

front passenger’s seat belt buckle switch, seat belt pretensioner assemblies, airbags,

interconnecting wiring and power sources. (

P. 43) 

■

Front passenger detection sensor, seat belt reminder and warning buzzer
If luggage is placed on the front passenger 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 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 insufficient 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. Initializing the tire

pressure warning system 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, adjusting

the tire inflation pressure will turn off the warning light (after a few minutes).

■

When a tire is replaced with a spare tire
The compact spare tire is not equipped with a tire pressure warning valve and transmit-

ter. 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 warning system may not function properly
P. 400

■

If the tire pressure warning light frequently 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.

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7-2. Steps to take in an emergency

■

Warning buzzer
In some cases, the buzzer may not be heard because of noisy place or an audio sound.

■

Customization
The vehicle speed linked seat belt reminder buzzer can be disabled. 

(Customizable features: 

P. 549)

WARNING

■

If both the ABS and the brake system warning lights remain on
Stop your vehicle in a safe place immediately and contact your Lexus dealer. The vehi-

cle 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.

If the steering wheel becomes heavier than usual when operating, hold firmly and oper-

ate using more force than usual.

■

If the tire pressure warning light comes on
Be sure to observe the following precautions. 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 inflation pressure

immediately. 

●

If the tire pressure warning light comes on even after tire inflation pressure adjust-

ment, 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 braking. 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.

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WARNING

■

Maintenance of the tires
Each tire, including the spare (if provided), should be checked monthly when cold and

inflated to the inflation pressure recommended by the vehicle manufacturer on the

vehicle placard or tire inflation pressure label (tire and load information label). (If your

vehicle has tires of a different size than the size indicated on the vehicle placard or tire

inflation 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 moni-

toring system (TPMS-tire pressure warning system) that illuminates a low tire pressure

telltale (tire pressure warning light) when one or more of your tires is significantly

under-inflated. Accordingly, 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 significantly under-inflated tire causes the

tire to overheat and can lead to tire failure. Under-inflation also reduces fuel efficiency

and tire tread life, and may affect the vehicle’s handling and stopping ability.
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 illumination of the TPMS low

tire pressure telltale (tire pressure warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warning system) mal-

function indicator to indicate when the system is not operating properly. The TPMS

(tire pressure warning system) malfunction indicator is combined with the low tire pres-

sure telltale (tire pressure warning light). When the system detects a malfunction, the

telltale will flash for approximately one minute and then remain continuously illumi-

nated. This sequence will continue upon subsequent 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 functioning 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 specifications or markers, as the tire pressure warning

system may not operate properly.

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7-2. Steps to take in an emergency

If a warning message is displayed

Master warning light

The master warning light also comes on or flashes in order to indicate that a message

is currently being displayed on the multi-information display.

Multi-information display

If any of the warning light comes on again after the following actions have been
performed, contact your Lexus dealer.

If a warning is shown on the multi-information display, stay calm and perform
the following actions:



GS350/GS300 
(except F SPORT models)



GS350/GS300 
(F SPORT models)



GS F

1

2

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Warning message and warning buzzer list

Warning message

Details/Actions

(If equipped)

Indicates that there is a high possibility of a frontal colli-

sion, or that the pre-collision braking function is operat-

ing

At the same time, 

 will appear on the head-up

display.

A buzzer also sounds.

 Avoid the collision by decelerating using the brakes

or taking other evasive actions.

(If equipped)

Indicates that your vehicle is nearing the vehicle ahead

(in vehicle-to-vehicle distance control mode)

At the same time, 

 will appear on the head-up dis-

play (the image flashes).

A buzzer also sounds.

 Slow the vehicle by applying the brakes.

(If equipped)

Indicates that the vehicle has deviated from the lane

(while the LKA [Lane-Keeping Assist] system is operat-

ing)

The lane line on the side the vehicle has deviated from

flashes in amber.
At the same time, 

 will appear on the head-up

display (the image flashes).

A buzzer also sounds.

 Check around the vehicle and back to inside of the

lane lines.

Indicates a malfunction in the brake system

A buzzer also sounds.

 Have the vehicle inspected by your Lexus dealer

immediately.

Continuing to drive the vehicle may be dangerous.

(U.S.A.)

(Canada)

(Flashes)

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7-2. Steps to take in an emergency

Indicates that hood or one or more of the doors or trunk

are not fully closed

The system also indicates which hood or doors or

trunk are not fully closed.

If the vehicle reaches a speed of 3 mph (5 km/h),

 flashes and a buzzer sounds to indicate that

the hood or door(s) or trunk are not yet fully closed.

 Make sure that hood or all doors or trunk are

closed.

(If equipped)

Indicates a malfunction in the intuitive parking assist

All assist-sensors flash.

A buzzer also sounds.

 Have the vehicle inspected by your Lexus dealer.

(If equipped)

Indicates that intuitive parking assist sensor is dirty or

covered with ice

A buzzer also sounds.

 Clean the sensor.

Warning message

Details/Actions

(GS350/GS300)

(GS F)

(GS350/GS300)

(GS F)

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Indicates an attempt was made to release the parking

brake with a door open or the front passenger’s seat belt

unfastened

A buzzer also sounds.

 Close all doors and fasten the front passenger’s seat

belt before releasing the parking brake.

Indicates that the driver’s door was opened with the shift

position in any position other than P

A buzzer also sounds.

 Shift the shift position to P.

Indicates a malfunction in the EPS (Electric Power Steer-

ing) system

A buzzer also sounds.

 Have the vehicle inspected by your Lexus dealer.

Warning message

Details/Actions

(Flashes)

(Flashes)

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7-2. Steps to take in an emergency

Indicates that the vehicle is being driven at 3 mph (5 km/h)

or more with the parking brake still engaged.

A buzzer also sounds.

 Release the parking brake.

Indicates that the parking brake is engaged with the shift

position not in P

A buzzer also sounds.

 Change the shift position to P.

Indicates a malfunction in the brake hold system

A buzzer also sounds.

 Depress the brake pedal to turn off the brake hold

system.

Have the vehicle inspected by your Lexus dealer

immediately.

Indicates that the brake hold system is turned on while on

a steep slope

A buzzer also sounds.

 Do not use only the brake hold system on steep

slopes. Be sure to also depress the brake pedal.

Warning message

Details/Actions

(Flashes)

(Flashes)

(Flashes)

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Indicates a malfunction in the parking brake system

A buzzer also sounds.

 Press the parking brake switch. If the warning mes-

sage is still displayed, have the vehicle inspected by

your Lexus dealer.

Indicates an attempt was made to release the parking

brake without depressing the brake pedal

A buzzer also sounds.

 Release the parking brake while depressing the

brake pedal.

Indicates that the shift position was changed and Drive-

Start Control was operated while depressing the accel-

erator pedal

A buzzer also sounds.

 Momentarily release the accelerator pedal.

Indicates an attempt was made to shift to 1st gear with

the shift position in M while on a slippery surface

The vehicle will not shift down from 2nd gear.

A buzzer also sounds.

 The vehicle will not shift down from 2nd gear.

Warning message

Details/Actions

(Flashes)

(U.S.A.)

(Flashes)

(Canada)

(Flashes)

(Flashes)

450

7-2. Steps to take in an emergency

(If equipped)

Indicates that the LKA (Lane-Keeping Assist) system has

determined that the driver does not have their hands on

the steering wheel while the steering control function is

on

If the driver operates the steering wheel only a small

amount, the system may be unable to detect the steer-

ing wheel operations and this warning may be dis-

played.

A buzzer also sounds.

 Firmly hold the steering wheel.

(If equipped)

Indicates that steering control function is temporarily

canceled due to the LKA (Lane-Keeping Assist) system

determining that the driver does not have their hands on

the steering wheel while the steering control function is

on

If the driver operates the steering wheel only a small

amount, the system may be unable to detect the steer-

ing wheel operations and this warning may be dis-

played.

 Firmly hold the steering wheel.

Indicates that the parking brake system is overheating

A buzzer also sounds.

 Do not use the parking brake until the message dis-

appears.

Indicates an engine malfunction

A buzzer also sounds.

 Have the vehicle inspected by your Lexus dealer.

Warning message

Details/Actions

(U.S.A.)

(Canada)

(U.S.A.)

(Canada)

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Indicates an engine malfunction

A buzzer also sounds.

 Have the vehicle inspected by your Lexus dealer.

Indicates an engine malfunction

A buzzer also sounds.

 Have the vehicle inspected by your Lexus dealer.

Indicates a malfunction in:

• The SRS airbag system;

• The front passenger occupant classification system;

or,

• The seat belt pretensioner system

A buzzer also sounds.

 Have the vehicle inspected by your Lexus dealer.

Indicates a malfunction in:

• The ABS; or

• The brake assist system

A buzzer also sounds.

 Immediately stop the vehicle in a safe place and

contact your Lexus dealer. Continuing to drive the

vehicle may be dangerous.

Warning message

Details/Actions

(U.S.A.)

(Canada)

(U.S.A.)

(Canada)

452

7-2. Steps to take in an emergency

Indicates that the engine coolant temperature is too high

A buzzer also sounds.

 P. 512

(GS350/GS300 only)

Indicates a malfunction in the vehicle’s charging system.

 Immediately stop the vehicle in a safe place and

contact your Lexus dealer. Continuing to drive the

vehicle may be dangerous.

(If equipped)

Indicates that the radar sensor is dirty or covered with

ice

A buzzer also sounds.

 Clean the sensor.

Warning message

Details/Actions

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7-2. Steps to take in an emergency

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(If equipped)

Indicates that the dynamic radar cruise control system

cannot be used temporarily due to bad weather

A buzzer also sounds.

 Use the radar cruise control system when it

becomes available again.

(If equipped)

Indicates that the radar cruise control system brake con-

trol function is temporarily unavailable

A buzzer also sounds.

 Depress the brake.

Indicates a malfunction in the smart access system with

push-button start

A buzzer also sounds.

 Have the vehicle inspected by your Lexus dealer.

(If equipped)

Indicates that a Blind Spot Monitor sensor or the sur-

rounding area on the bumper is dirty or covered with ice

A buzzer also sounds.

 Clean the sensor and its surrounding area on the

bumper.

Warning message

Details/Actions

(Flashes)

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7-2. Steps to take in an emergency

Indicates a malfunction in the cruise control system or

dynamic radar cruise control system (if equipped)

Press the “ON/OFF” button once to deactivate the

system, and then press the button again to reactivate

the system.

A buzzer also sounds.

 Have the vehicle inspected by your Lexus dealer.

(If equipped)

Indicates a malfunction in the dynamic radar cruise con-

trol with full-speed range

Depress the brake pedal.

A buzzer also sounds.

 Have the vehicle inspected by your Lexus dealer.

(If equipped)

Indicates a malfunction in the LKA (Lane-Keeping

Assist) system

A buzzer also sounds.

 Have the vehicle inspected by your Lexus dealer.

(If equipped)

The operation conditions of the camera sensor (tem-

perature, etc.) are not met.

 When the operation conditions of the camera sen-

sor (temperature, etc.) are met, the following sys-

tems will become available.

• PCS (Pre-Collision System)

• LKA (Lane-Keeping Assist) system

• Dynamic radar cruise control with full-speed range

• Automatic  High  Beam

Warning message

Details/Actions

(Flashes)

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7-2. Steps to take in an emergency

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(If equipped)

Indicates that the system is temporarily unavailable due

to a malfunction in a sensor other than the camera sen-

sor

A buzzer also sounds.

 Turn the LKA (Lane-Keeping Assist) system off, wait

for a little while, and then turn the LKA (Lane-Keep-

ing Assist) system back on.

(If equipped)

Dirt, rain, condensation, ice, snow, etc., are present on

the windshield in front of the camera sensor.

The following systems may be suspended until the

problem shown in the message is resolved.

• PCS (Pre-Collision System)

• LKA (Lane-Keeping Assist) system

• Dynamic radar cruise control with full-speed range

• Automatic  High  Beam

 Turn the system off, remove any dirt, rain, condensa-

tion, ice, snow, etc., from the windshield, and then

turn the system back on.

(If equipped)

Indicates a malfunction in the PCS (Pre-Collision Sys-

tem)

A buzzer also sounds.

 Have the vehicle inspected by your Lexus dealer.

Warning message

Details/Actions

(Flashes)