LEXUS IS 300 (2019 year). Instruction - part 14

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4-3. Operating the lights and wipers

IS350 AWD/IS350/IS300 AWD/IS300_U

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The windshield wiper and washer can be operated when
The engine switch is in IGNITION ON mode.

■

Dripping prevention wiper sweep
After performing a washing and wiping operation several times, the wipers operate one

more time after a short delay to prevent dripping.
However, this final wiper operation will not be performed while driving.

■

Effects of vehicle speed on wiper operation (vehicles with rain-sensing windshield wip-

ers)
Vehicle speed affects the following even when the wipers are not in AUTO mode.

●

Intermittent wiper interval 

●

Wiper operation when the washer is being used (delay until drip prevention wiper

sweep occurs)

With low speed windshield wiper operation selected, wiper operation will be switched

from low speed to intermittent wiper operation only when the vehicle is stationary.

■

Raindrop sensor (vehicles with rain-sensing windshield wipers)

●

If the wiper is turned to AUTO mode while the engine switch is in IGNITION ON

mode, the wipers will operate once to show that AUTO mode is activated.

●

If the temperature of the raindrop sensor is 185°F (85°C) or higher, or -22°F (-30°C)

or lower, automatic operation may not occur. In this case, operate the wipers in any

mode other than AUTO mode.

■

When the windshield wipers are in temporary operation (vehicles with rain-sensing

windshield wipers)

AUTO mode cannot be activated even if 

 is pressed.

■

If no windshield washer fluid sprays
Check that the washer nozzles are not blocked if there is washer fluid in the windshield

washer fluid reservoir.

●

The raindrop sensor judges the amount of

raindrops.
An optical sensor is adopted. It may not oper-

ate properly when sunlight from the rising or

setting of the sun intermittently strikes the

windshield, or if bugs etc. are present on the

windshield.

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WARNING

■

Caution regarding the use of windshield wipers in AUTO mode
The windshield wipers may operate unexpectedly if the sensor is touched or the wind-

shield is subject to vibration in AUTO mode. Take care that your fingers or anything

else do not become caught in the windshield wipers.

■

Caution regarding the use of washer fluid
When it is cold, do not use the washer fluid until the windshield becomes warm. The

fluid may freeze on the windshield and cause low visibility. This may lead to an accident,

resulting in death or serious injury.

NOTICE

■

When the windshield is dry
Do not use the wipers, as they may damage the windshield.

■

When there is no washer fluid spray from the nozzle
Damage to the washer fluid pump may be caused if the lever is pulled toward you and

held continually.

■

When a nozzle becomes blocked
In this case, contact your Lexus dealer. 

Do not try to clear it with a pin or other object. The nozzle will be damaged.

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IS350 AWD/IS350/IS300 AWD/IS300_U

4-4. Refueling

●

Close all the doors and windows, and turn the engine switch off.

●

Confirm the type of fuel.

■

Fuel types
P. 589

■

Fuel tank opening for unleaded gasoline
To help prevent incorrect fueling, your vehicle has a fuel tank opening that only accom-

modates the special nozzle on unleaded fuel pumps.

■

If the malfunction indicator lamp illuminates
The malfunction indicator lamp may illuminate erroneously if refueling is performed

repeatedly when the fuel tank is nearly full.

Opening the fuel tank cap

Perform the following steps to open the fuel tank cap: 

Before refueling the vehicle

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4-4. Refueling

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WARNING

■

When refueling the vehicle
Observe the following precautions while refueling the vehicle. Failure to do so may

result in death or serious injury.

●

After exiting the vehicle and before opening the fuel door, touch an unpainted metal

surface to discharge any static electricity. It is important to discharge static electricity

before refueling because sparks resulting from static electricity can cause fuel vapors

to ignite while refueling.

●

Always hold the grips on the fuel tank cap and turn it slowly to remove it. 

A whooshing sound may be heard when the fuel tank cap is loosened. Wait until the

sound cannot be heard before fully removing the cap. In hot weather, pressurized fuel

may spray out the filler neck and cause injury.

●

Do not allow anyone that has not discharged static electricity from their body to come

close to an open fuel tank.

●

Do not inhale vaporized fuel.

Fuel contains substances that are harmful if inhaled.

●

Do not smoke while refueling the vehicle.

Doing so may cause the fuel to ignite and cause a fire.

●

Do not return to the vehicle or touch any person or object that is statically charged.

This may cause static electricity to build up, resulting in a possible ignition hazard.

■

When refueling
Observe the following precautions to prevent fuel overflowing from the fuel tank:

●

Securely insert the fuel nozzle into the fuel filler neck.

●

Stop filling the tank after the fuel nozzle automatically clicks off.

●

Do not top off the fuel tank.

NOTICE

■

Refueling
Do not spill fuel during refueling. 

Doing so may damage the vehicle, such as causing the emission control system to

operate abnormally or damaging fuel system components or the vehicle’s painted sur-

face.

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4-4. Refueling

IS350 AWD/IS350/IS300 AWD/IS300_U

With the doors unlocked, press the
center of the rear edge of the fuel
filler door.

Push until you hear a click and take your

hand away to slightly open the fuel filler

door. Then open the door fully by hand.

Turn the fuel tank cap slowly to
remove it and put it into the holder
on the fuel filler door. 

■

If the fuel filler door cannot be opened

Opening the fuel tank cap

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2

Remove the cover inside the trunk and pull the

lever to open the fuel filler door if the fuel filler

door cannot be opened by pressing the rear

edge of the fuel filler door.

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After refueling, turn the fuel tank cap
until you hear a click. Once the cap
is released, it will turn slightly in the
opposite direction.

Close the fuel filler door, and press
the center of the rear edge of the
fuel filler door until you hear a click.

When you lock the doors, the fuel filler

door will also lock.

■

Fuel filler door lock condition
The fuel filler door may not be locked even when the vehicle’s doors are locked in the fol-

lowing situations: 

●

When operating the door lock button inside the vehicle

●

When the automatic door locking system is operated (

P. 598)

●

When the fuel filler door is closed after the vehicle’s doors are locked

Closing the fuel tank cap

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WARNING

■

When replacing the fuel tank cap
Do not use anything but a genuine Lexus fuel tank cap designed for your vehicle. Doing

so may cause a fire or other incident which may result in death or serious injury.

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IS350 AWD/IS350/IS300 AWD/IS300_U

4-5. Using the driving support systems

◆

PCS (Pre-Collision System)

P. 229

◆

LDA (Lane Departure Alert with steering control)

P. 240

◆

Automatic High Beam

P. 206

◆

Dynamic radar cruise control

P. 248

Lexus Safety System +

The Lexus Safety System + consists of the following drive assist systems and
contributes to a safe and comfortable driving experience:

WARNING

■

Lexus Safety System +
The Lexus Safety System + is designed to operate under the assumption that the driver

will drive safely, and is designed to help reduce the impact to the occupants and the

vehicle in the case of a collision or assist the driver in normal driving conditions. 
As there is a limit to the degree of recognition accuracy and control performance that

this system can provide, do not overly rely on this system. The driver is always responsi-

ble for paying attention to the vehicle's surroundings and driving safely.

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4-5. Using the driving support systems

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The pre-collision system is equipped with a sophisticated computer that will
record certain data, such as:

• Accelerator status
• Brake  status
• Vehicle speed
• Operation status of the pre-collision system functions
• Information (such as the distance and relative speed between your vehicle

and the vehicle ahead or other objects)

• Images from the camera sensor (available only when the pre-collision braking

function or the pre-collision brake assist function was operating)

The pre-collision system does not record conversations, sounds or images of the
inside of the vehicle.

●

Data usage
Lexus may use the data recorded in this computer to diagnose malfunctions,
conduct research and development, and improve quality.
Lexus will not disclose the recorded data to a third party except:

• With the consent of the vehicle owner or with the consent of the lessee if

the vehicle is leased

• In response to an official request by the police, a court of law or a govern-

ment agency

• For use by Lexus in a lawsuit
• For research purposes where the data is not tied to a specific vehicle or

vehicle owner

●

Recorded images can be erased using a specialized device.
The image recording function can be disabled. However, if the function is dis-
abled, data from when the pre-collision system operates will not be available.

Vehicle data recording

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4-5. Using the driving support systems

IS350 AWD/IS350/IS300 AWD/IS300_U

Two types of sensors, located behind the front grille and windshield, detect infor-
mation necessary to operate the drive assist systems.

Radar sensor
Camera sensor

Sensors

1

2

WARNING

■

To avoid malfunction of the radar sensor
Observe the following precautions.
Otherwise, the radar sensor may not operate properly, possibly leading to an accident

resulting in death or serious injury.

●

Keep the radar sensor and front grille emblem clean at all times.

●

Do not attach accessories, stickers (including transparent stickers) or other items to

the radar sensor, front grille emblem or surrounding area.

●

Do not subject the radar sensor or surrounding area to a strong impact. 

If the radar sensor, front grille, or front bumper has been subjected to a strong impact,

have the vehicle inspected by your Lexus dealer.

●

Do not disassemble the radar sensor.

●

Do not modify or paint the radar sensor, front grille emblem or surrounding area.

●

If the radar sensor, front grille, or front bumper needs to be removed and installed, or

replaced, contact your Lexus dealer.

Radar sensor
Front grille emblem

If the front of the radar sensor or the front or

back of the front grille emblem is dirty or

covered with water droplets, snow, etc., clean

it.
Clean the radar sensor and front grille

emblem with a soft cloth so you do not mark

or damage them.

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WARNING

■

To avoid malfunction of the camera sensor
Observe the following precautions.
Otherwise, the camera sensor may not operate properly, possibly leading to an acci-

dent resulting in death or serious injury.

●

Keep the windshield clean at all times. 
• If the windshield is dirty or covered with an oily film, water droplets, snow, etc.,

clear the windshield. 

• If a glass coating agent is applied to the windshield, it will still be necessary to use

the windshield wipers to remove water droplets, etc. from the area of the wind-

shield in front of the camera sensor.

• If the inner side of the windshield where the camera sensor is installed is dirty, con-

tact your Lexus dealer.

●

If the part of the windshield in front of the camera sensor is fogged up or covered with

condensation or ice, use the windshield defogger to remove the fog, condensation or

ice. (

P. 422)

●

If water droplets cannot be properly removed from the area of the windshield in front

of the camera sensor by the windshield wipers, replace the wiper insert or wiper

blade. 

If the wiper inserts or wiper blades need to be replaced, contact your Lexus dealer.

●

Do not attach objects, such as stickers, trans-

parent stickers, and so forth, to the outer side

of the windshield in front of the camera sensor

(shaded area in the illustration).

A: From the top of the windshield to approxi-

mately 0.4 in. (1 cm) below the bottom of the

camera sensor

B: Approximately 7.9 in. (20 cm) (Approxi-

mately 4.0 in. [10 cm] to the right and left

from the center of the camera sensor)

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4-5. Using the driving support systems

IS350 AWD/IS350/IS300 AWD/IS300_U

WARNING

●

Do not attach window tinting to the windshield.

●

Replace the windshield if it is damaged or cracked. 

If the windshield needs to be replaced, contact your Lexus dealer.

●

Do not get the camera sensor wet.

●

Do not allow bright lights to shine into the camera sensor.

●

Do not dirty or damage the camera sensor. 

When cleaning the inside of the windshield, do not allow glass cleaner to contact the

lens. Also, do not touch the lens. 

If the lens is dirty or damaged, contact your Lexus dealer.

●

Do not subject the camera sensor to a strong impact.

●

Do not change the installation position or direction of the camera sensor or remove it.

●

Do not disassemble the camera sensor.

●

Do not modify any components of the vehicle around the camera sensor (inside rear

view mirror, etc.) or ceiling.

●

Do not attach any accessories that may obstruct the camera sensor to the hood, front

grille or front bumper. Contact your Lexus dealer for details.

●

If a surfboard or other long object is to be mounted on the roof, make sure that it will

not obstruct the camera sensor.

●

Do not modify the headlights or other lights.

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■

Certification



For vehicles sold in the U.S.A.



For vehicles sold in Canada

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PCS (Pre-Collision System)

The pre-collision system uses a radar sensor and camera sensor to detect
vehicles and pedestrians in front of your vehicle. When the system determines
that the possibility of a frontal collision with a vehicle or pedestrian is high, a
warning operates to urge the driver to take evasive action and the potential
brake pressure is increased to help the driver avoid the collision. If the system
determines that the possibility of a frontal collision with a vehicle or pedes-
trian is extremely high, the brakes are automatically applied to help avoid the
collision or help reduce the impact of the collision.

The pre-collision system can be disabled/enabled and the warning timing can
be changed. (

P. 233)

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4-5. Using the driving support systems

IS350 AWD/IS350/IS300 AWD/IS300_U

◆

Pre-collision warning

When the system determines that
the possibility of a frontal collision is
high, a buzzer will sound and a warn-
ing message will be displayed on the
multi-information display to urge the
driver to take evasive action.

◆

Pre-collision brake assist

When the system determines that the possibility of a frontal collision is high,
the system applies greater braking force in relation to how strongly the brake
pedal is depressed.

◆

Pre-collision braking

When the system determines that the possibility of a frontal collision is high,
the system warns the driver. If the system determines that the possibility of a
frontal collision is extremely high, the brakes are automatically applied to help
avoid the collision or reduce the collision speed.

◆

Suspension control (if equipped)

When the system determines that the possibility of a frontal collision is high,
the Adaptive Variable Suspension System (

P. 302) will control the damping

force of the shock absorbers to help maintain an appropriate vehicle posture.

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WARNING

■

Limitations of the pre-collision system

●

The driver is solely responsible for safe driving. Always drive safely, taking care to

observe your surroundings. 

Do not use the pre-collision system instead of normal braking operations under any

circumstances. This system will not prevent collisions or lessen collision damage or

injury in every situation. Do not overly rely on this system. Failure to do so may lead to

an accident, resulting in death or serious injury.

●

Although this system is designed to help avoid a collision or help reduce the impact of

the collision, its effectiveness may change according to various conditions, therefore

the system may not always be able to achieve the same level of performance. 

Read the following conditions carefully. Do not overly rely on this system and always

drive carefully.
• Conditions under which the system may operate even if there is no possibility of a

collision: 

P. 235

• Conditions under which the system may not operate properly: 

P. 237

●

Do not attempt to test the operation of the pre-collision system yourself, as the system

may not operate properly, possibly leading to an accident.

■

Pre-collision braking

●

When the pre-collision braking function is operating, a large amount of braking force

will be applied.

●

If the vehicle is stopped by the operation of the pre-collision braking function, the pre-

collision braking function operation will be canceled after approximately 2 seconds.

Depress the brake pedal as necessary.

●

The pre-collision braking function may not operate if certain operations are per-

formed by the driver. If the accelerator pedal is being depressed strongly or the steer-

ing wheel is being turned, the system may determine that the driver is taking evasive

action and possibly prevent the pre-collision braking function from operating.

●

In some situations, while the pre-collision braking function is operating, operation of

the function may be canceled if the accelerator pedal is depressed strongly or the

steering wheel is turned and the system determines that the driver is taking evasive

action.

●

If the brake pedal is being depressed, the system may determine that the driver is tak-

ing evasive action and possibly delay the operation timing of the pre-collision braking

function.