Lexus RX350 (2023 year). Manual in english - page 9

■

Dynamic radar cruise control system

warning messages and buzzers

For safe use:

P.229

■

Preceding vehicles that the sensor may

not detect correctly

In the following situations, depending on the

conditions, if the system cannot provide suf-

ficient deceleration or acceleration is nec-

essary, operate the brake pedal or

accelerator pedal.
As the sensor may not be able to correctly

detect these types of vehicles, the approach

warning (

P.279) may not operate.

●

When a vehicle cuts in front of your vehi-

cle or changes lanes away from your

vehicle extremely slowly or quickly

●

When changing lanes

●

When a preceding vehicle is driving at a

low speed

●

When a vehicle is stopped in the same

lane as the vehicle

●

When a motorcycle is traveling in the

same lane as the vehicle

■

Conditions under which the system may

not operate correctly

In the following situations, operate the

brake pedal (or accelerator pedal, depend-

ing on the situation) as necessary.
As the sensor may not be able to correctly

detect a vehicle, the system may not oper-

ate properly.

●

When a preceding vehicle brakes sud-

denly

●

When changing lanes at low speeds, such

as in a traffic jam

■

Conditions for extended resume time

(vehicles with Traffic Jam Assist)

Extended resume time is activated when all

of the following conditions are satisfied:

●

Vehicles with a display audio: The con-

nected service that Lexus provides is

subscribed to. Contact your Lexus dealer

for details.

●

The vehicle is driving on a vehicle-only

road, such as an expressway.

●

There is a preceding vehicle and the sys-

tem is able to detect it.

●

No vehicle interruptions occur.

●

The preceding vehicle has not been

replaced.

●

Clearance sonar and FCTA are not

detecting the object in front of you.

●

The driver monitor judges that the driver

is looking forward.

●

The steering wheel has not been oper-

ated.

●

The brake pedal has not been operated.

In situations where the vehicle

Approach warning

280

4-5. Using the driving support systems

approaches a preceding vehicle and
the system cannot provide sufficient
deceleration, such as if a vehicle cuts in
front of the vehicle, a warning display
will flash and a buzzer will sound to
alert the driver. Depress the brake
pedal to ensure appropriate vehi-
cle-to-vehicle distance.

■

Warnings may not occur when

In the following situations, the warning
may not operate even though the vehi-
cle-to-vehicle distance is short.



When the preceding vehicle is trav-
eling at the same speed or faster
than your vehicle



When the preceding vehicle is trav-
eling at an extremely low speed



Immediately after the vehicle speed
has been set



When the accelerator pedal is
depressed

When a curve is detected, the vehicle
speed will begin being reduced. When
the curve ends, the vehicle speed
reduction will end.

Depending on the situation, the vehicle
speed will then return to the set vehicle
speed.
In situations where vehicle-to-vehicle dis-
tance control needs to operate, such as
when a preceding vehicle cuts in front of
your vehicle, the curve speed reduction
function will be canceled.

■

Situations in which the curve speed

reduction function may not operate

In situations such as the following, the curve

speed reduction function may not operate:

●

When the vehicle is being driven around

a gentle curve

●

When the accelerator pedal is being

depressed

●

When the vehicle is being driven around

an extremely short curve

While a warning of the driver monitor
is being displayed, the vehicle acceler-
ation will be restrained.
When the warning of the driver moni-
tor disappears, the restrained acceler-
ation control will end.

If your vehicle is being driven at
approximately 50 mph (80 km/h) or
more and a lane change to the passing
lane is performed, when the turn signal
lever is operated and the lane is
changed, the vehicle will accelerate up
to the set speed to assist in overtaking.

The system’s recognition of which lane is
the passing lane may be based solely on

Curve speed reduction function

Driver Monitor support function
(if equipped)

Support for lane change

281

4-5. Using the driving support systems

Driving

the location of the steering wheel in the
vehicle (left-hand drive/right-hand drive). If
the vehicle is driven in a location where the
passing lane is on the opposite side of that
where the vehicle was originally sold, the
vehicle may accelerate when the turn sig-
nal lever is operated away from the passing
lane. (e.g. The vehicle was manufactured
for a right-hand traffic location, but is being
driven in a left-hand traffic location. The
vehicle may accelerate when the turn sig-
nal lever is operated to the right.)

If your vehicle is being driven at
approximately 50 mph (80 km/h) or

more and the lane is changed to that
with a vehicle traveling slower than
your vehicle, when the turn signal lever
is operated the vehicle will gradually
decelerate to assist in changing lanes.



The settings of Dynamic radar
cruise control can be changed
through customize settings.
(

The operating state of Dynamic radar cruise control is indicated.

Changing Dynamic radar cruise
control settings

Display and system operation state

Indicator

Multi-information display

Situation

White

Vehi-

cle-to-vehicle

distance set-

ting: Grey

Dynamic radar

cruise control

being OFF

Green

Vehi-

cle-to-vehicle

distance set-

ting: Blue

Set vehicle

speed: Green

Constant

speed cruising

282

4-5. Using the driving support systems

Green

Vehi-

cle-to-vehicle

distance set-

ting: Blue

Set vehicle

speed: Green

Preceding

vehicle: White

Follow-up

cruising

Green

Vehi-

cle-to-vehicle

distance set-

ting: Orange

flashing

Set vehicle

speed: Green

Preceding

vehicle:

Orange flash-

ing

Approach

warning

Green

Vehi-

cle-to-vehicle

distance set-

ting: Grey

Set vehicle

speed: White

Preceding

vehicle: Grey

Accelerating

with the accel-

erator pedal

Green

Set vehicle

speed: Green
in reverse dis-

play

Set vehicle

speed being

exceeded

Indicator

Multi-information display

Situation

283

4-5. Using the driving support systems

Driving

■

Meter display

Set vehicle speed
Cruise control indicator

■

Switches



Vehicles without a head-up display

Driving assist mode select switch
Driving assist switch
“+” switch/“RES” switch
“-” switch
Cancel switch

Cruise control

The vehicle can be driven at a set
speed even if the accelerator pedal
is not depressed.

Use the cruise control only on high-
ways and expressways.

WARNING

■

For safe use

●

Driving safely is solely the responsibil-

ity of the driver. Therefore, do not

overly rely on this system. The driver is

solely responsible for paying attention

to the vehicle’s surroundings and driv-

ing safely.

●

Set the speed appropriately according

to the speed limit, traffic flow, road

conditions, weather conditions, etc.

The driver is responsible for confirm-

ing the set speed.

■

Situations in which cruise control

should not be used

Do not use the cruise control in the fol-

lowing situations. As the system will not

be able to provide appropriate control,

using it may lead to an accident resulting

in death or serious injury.

●

On roads with sharp bends

●

On winding roads

●

On slippery roads, such as those cov-

ered with rain, ice or snow

●

On steep downhills, or where there

are sudden changes between sharp up

and down gradients

Vehicle speed may exceed the set speed

when driving down a steep hill.

●

When it is necessary to disable the sys-

tem:

P.229

System Components

284

4-5. Using the driving support systems



Vehicles with a head-up display

The function of each switch differs
depending on the conditions and
settings.

When a switch is touched, the function of
each switch is displayed on the head-up
display. If the head-up display is off, the
functions will be displayed on the
multi-information display.

Driving assist mode select switch
Driving assist switch
“RES” switch
“+” switch
“-” switch
Cancel switch

Press the driving assist mode select
switch to select cruise control.

The cruise control indicator will illuminate.



Vehicles without a head-up display



Vehicles with a head-up display

Using the accelerator pedal, accel-
erate to the desired vehicle speed
(approximately 20 mph [30 km/h]
or more), and press the driving
assist switch to set the set vehicle
speed.

The vehicle speed at the moment the

switch is released will be the set vehicle

speed.

B
C
D

E
F

Using the cruise control

Setting the vehicle speed

285

4-5. Using the driving support systems

Driving



Vehicles without a head-up display



Vehicles with a head-up display



Adjusting the set vehicle speed
using the switches

To change the set vehicle speed, press
the “+” switch or “-” switch until the
desired speed is displayed.



Vehicles without a head-up display

Increase set vehicle speed

Decrease set vehicle speed



Vehicles with a head-up display

Increase set vehicle speed

Decrease set vehicle speed

The set vehicle speed will increase or
decrease as follows:

Fine adjustment: By 0.6 mph (1 km/h) or 1
mph (1.6 km/h) each time the switch is
pressed
Large adjustment: Increases continuously
while the switch is pressed and held



Increasing the set vehicle speed
using the accelerator pedal

Depress the accelerator pedal to
accelerate the vehicle to the
desired vehicle speed.

Press the “+” switch.



Vehicles without a head-up display

Adjusting the set vehicle speed

Canceling/resuming control

286

4-5. Using the driving support systems



Vehicles with a head-up display

Press the cancel switch or driving
assist switch to cancel control.

Control will also be canceled if the brake

pedal is depressed.

Press the “RES” switch to resume
control.

■

Automatic cancellation of the cruise

control

In the following situations, the cruise control

will be canceled automatically:

●

When the vehicle speed drops approxi-

mately 10 mph (16 km/h) or more below

the set vehicle speed

●

When the vehicle speed drops below

approximately 20 mph (30 km/h)

●

When the brake control or output restric-

tion control of a driving support system

operates

(For example: PCS, drive-start control)

●

When the parking brake has been oper-

ated

●

Situations in which some or all of the

functions of the system cannot operate:



The operating state of cruise control is indicated.

Display and system operation state

Indicator

Multi-information display

Situation

White

Blank

Cruise control

being OFF

288

4-5. Using the driving support systems

Operation of this system is separated
into 4 control states. Through control
state “Warning phase 1” and “Warning
phase 2”, the system determines if the
driver is aware and responsive while
outputting a warning and controlling

Emergency Driving Stop
System

The emergency driving stop system
is a system which automatically
decelerates and stops the vehicle
within its lane if the driver becomes
unable to continue driving the vehi-
cle, such as if they have suffered a
medical emergency, etc.

During LTA (Lane Tracing Assist)
control, if the system does not
detect driving operations, such as if
the driver is not holding the steer-
ing wheel, and determines the
driver is not responsive, the vehicle
will be decelerated and stopped
within its current lane to help avoid
a collision or reduce the impact of a
collision.

The vehicle will also deceler-
ate/stop during the Traffic Jam
Assist (if equipped) controls, when
no driver’s response to the vehicle’s
warning to hold the steering wheel
is detected.

WARNING

■

For safe use

●

Driving safely is solely the responsibil-

ity of the driver. Pay careful attention to

the surrounding conditions in order to

ensure safe driving. The emergency

driving stop system is designed to pro-

vide support in an emergency where it

is difficult for the driver to continue

driving, such as if they have had a med-

ical emergency. It is not designed to

support driving while drowsy or in

poor physical health, or inattentive

driving.

●

Although the emergency driving stop

system is designed to decelerate the

vehicle within its lane to help avoid or

help reduce the impact of a collision if

the system determines that it is difficult

for the driver to continue driving, its

effectiveness may change according

to various conditions. Therefore, it may

not always be able to achieve the same

level of performance. Also, if the oper-

ating conditions are not met, this func-

tion will not operate.

●

After the emergency driving stop sys-

tem operates, if driving becomes pos-

sible again, immediately begin driving

again or, if necessary, park the vehicle

on the shoulder of the road and set a

warning reflector and flare to warn

other drivers of your stopped vehicle.

●

After this system operates, passengers

should attend to the driver as neces-

sary and take appropriate hazard pre-

vention measures, such as moving to a

place where safety can be ensured,

such as the shoulder of the road or

behind a guardrail.

●

This system detects the condition of

the driver through the operation of the

steering wheel. This system may oper-

ate if the driver is aware but intention-

ally and continuously does not operate

the vehicle. Also, the system may not

operate if it cannot determine that the

driver is not responsive, such as if they

are leaning on the steering wheel.

●

Situations in which the driver monitor

may not operate properly (vehicles

with a driver monitor):

Summary of the system

289

4-5. Using the driving support systems

Driving

the vehicle speed. If the system deter-
mines the driver is not responsive, it will
operate in control state “Deceleration
stop phase” and “Stop hold phase” and
decelerate and stop the vehicle. It will
then operate continuously in “Stop
hold phase”.

■

Operating conditions

This system operates when all of the follow-

ing conditions are met:

●

When the LTA is on

Or during the Traffic Jam Assist controls (if
equipped)

●

When the vehicle speed is approximately

30 mph (50 km/h) or more

During the Traffic Jam Assist (if equipped)
controls, the system may operate at below
30 mph (50 km/h).

■

Operation cancelation conditions

In the following situations, system operation

will be canceled:

●

When LTA control has been canceled

(the LTA switch has been pressed, etc.)

●

When the dynamic radar cruise control

has been canceled

●

When driver operations are detected

(the steering wheel is held, the brake

pedal, accelerator pedal, parking brake,

hazard light switch, or turn signal lever is

operated)

●

When the driving assist switch is pressed

while in the stop and hold phase

●

When the engine switch has been turned

from ON to off

●

Situations in which some or all of the

functions of the system cannot operate:

■

LTA control when operation is canceled

When emergency driving stop system

operation is canceled, LTA control may also

be canceled.

If driving operations are not detected
after the hands off steering wheel
warning operates, a buzzer will sound
intermittently and a message will be
displayed to warn the driver, and the
system will judge if the driver is respon-
sive or not. If driving operations, such
as holding the steering wheel, are not
performed within a certain amount of
time, the system will enter warning
phase 2.
Vehicles with a driver monitor camera:
Depending on the type of detection of
the driver’s unresponsiveness, the sys-
tem may skip warning phase 1 and start
the control of warning phase 2.

After entering warning phase 2, a
buzzer will sound in short intervals and
a message will be displayed to warn the
driver, and the vehicle will slowly decel-
erate. If driving operations, such as
holding the steering wheel, are not
performed within a certain amount of
time, the system will determine that the
driver is not responsive and enter the
deceleration stop phase.

The audio system will be muted until the
driver becomes responsive.
When the vehicle is decelerating, the
brake lights may illuminate, depending on
the road conditions, etc.

After entering the deceleration stop

Warning phase 1

Warning phase 2

Deceleration stop phase

290

4-5. Using the driving support systems

phase, a buzzer will sound continu-
ously and a message will be displayed
to warn the driver, and the vehicle will
slowly decelerate and stop. After the
vehicle stops, the system will enter the
stop and hold phase.

After the vehicle is stopped, the park-
ing brake will be applied automatically.
After entering the stop and hold phase,
the buzzer will continue sounding con-
tinuously and the emergency flashers
(hazard lights) will flash to warn other
drivers of the emergency.

■

Restricted functions after the operation

is canceled

After shifting to the deceleration stop

phase, the following functions will not be

available until the engine is re-started even

though the emergency driving stop system

is canceled:

●

LTA

●

LCA (if equipped)

●

Traffic Jam Assist (if equipped)

: If equipped

Traffic Jam Assist is a system which,
through confirmation of the conditions
by the driver, provides lane keeping,
accelerating/decelerating, stopping,
and starting off support on some high-
ways and expressways. Also, in an
emergency, the system can decelerate
and stop, to help avoid a collision or
help reduce the impact of a collision.

■

Precautions for use



P.233



Sensors which detect the surround-
ing conditions (

P.230)



Sensors which detect the driver
condition (

P.231)

■

Situations in which some or all of the

functions of the system cannot operate



■

Changes in brake operation sound and

pedal response



■

Situations in which the driver monitor

may not operate properly



P.288

Stop hold phase

Traffic Jam Assist

Function Outline

Sensors that support the Traffic
Jam Assist

Emergency Driving Stop System

291

4-5. Using the driving support systems

Driving



P.272

The Traffic Jam Assist function, through
confirmation of the conditions by the
driver, provides lane keeping, acceler-
ating/decelerating and stopping sup-
port on some highways and
expressways.
This function is operable when all of the
operation conditions are met.
When this function is operating, it is
possible to take your hands off of the
steering wheel. (

P.293)

Before using the Traffic Jam Assist function,
familiarize yourself with the content of the
dynamic radar cruise control and the LTA
(Lane Tracing Assist).
Make sure that the driver steers the vehicle
when entering a service area/parking area
or toll gate, or when changing lanes.

When the operation of Traffic Jam
Assist is started, the following message
will be displayed:



“Allow Driver Monitor Camera
Recording?”

When recording is approved, the system
records images of the area around the
driver in certain crash or near crash-like
situations, such as an SRS airbag being
deployed or the vehicle hitting an object on
the road. (



P.9)

Extended resume time of
Dynamic radar cruise control

Traffic Jam Assist Function

Driver monitor camera record-
ing

WARNING

■

For safe use

●

Driving safely is solely the responsibil-

ity of the driver. Do not overly rely on

this system, and pay careful attention

to the surrounding conditions in order

to ensure safe driving.

●

The Traffic Jam Assist function is not an

automated driving system.

This function provides the driver with

information and driving assistance

according to the road shape and con-

ditions, traffic conditions, and the con-

dition of the driver themself. Always

pay careful attention to the surround-

ing conditions as use of the system is

the responsibility of the driver.

●

Depending on the condition of the sur-

rounding area, the road, or the driver,

the Traffic Jam Assist function may not

operate or operation may be sus-

pended. Also, it may not always be

able to achieve the same level of per-

formance. Read the operating condi-

tions of the function carefully. Do not

overly rely on this function and always

drive carefully.

●

As the recognition performance and

control performance of the Traffic Jam

Assist function are limited, driver oper-

ation is necessary to ensure safety

while the system is operating. Also, the

steering assist of this system is

designed to operate only for slow

steering operations during a traffic

jam. While this function is operating,

the lane deviation control function of

the LDA will not operate. If, for some

reason, the vehicle is about to deviate

the lane, it is the driver’s responsibility

to drive properly.

292

4-5. Using the driving support systems

WARNING

●

Even if Traffic Jam Assist is operating

properly, the surrounding conditions

as recognized by the driver and

detected by the system may differ.

Therefore, it is necessary for the driver

to pay attention, assess risks, and

ensure safety. Over-reliance on this

system to drive the vehicle safely may

lead to an accident resulting in death

or serious injury.

●

While the Traffic Jam Assist function is

operating, as driver operation may

become necessary, the driver must

ensure they have clear visibility of their

surroundings.

●

In certain situations, a message urging

the driver to hold the steering wheel

may be displayed by the Traffic Jam

Assist function. In this case, hold the

steering wheel and drive the vehicle

manually to ensure safety.

●

The Traffic Jam Assist function cannot

detect the following objects. Operate

the steering wheel, accelerator pedal,

or brake pedal as necessary to avoid a

collision. As the function will not be

able to provide appropriate control,

using it may lead to an accident result-

ing in death or serious injury.

• Objects on the road surface

• Vehicles outside of a lane (such as on

the shoulder of the road)

• Potholes, cracks, ruts, or other road

damage

• Road construction zones

• Vehicles running in parallel with your

vehicle or nearby walls

• Animals

■

Situations in which Traffic Jam Assist

Function should not be used

Do not use Traffic Jam Assist Function in

situations such as the following. As the

system will not be able to provide appro-

priate control, using it may lead to an

accident resulting in death or serious

injury.

●

When it is necessary to disable the sys-

tem

P.229

●

Situations in which the sensors may not

operate properly

P.234

●

Situations in which the lane may not be

detected

■

Situations in which the function may

not operate properly

In situations such as the following, the

Traffic Jam Assist function may not oper-

ate properly. Manually operate the vehi-

cle as necessary.

●

When a sensor is splashed by water

●

When the ambient temperature is high

or low

●

When a vehicle cuts in front of your

vehicle

●

When another lane merges into the

lane in the same traveling direction as

your vehicle

●

When driving in low visibility condition

●

When the vehicle posture is changing

●

When the traction on the road surface

differs greatly between the left and

right side tires

●

When driving on an expressway with

no median strips or when driving on an

expressway equipped with temporary

median markers, such as poles.

293

4-5. Using the driving support systems

Driving

■

Operating conditions of the function

This function is operable when all of the fol-

lowing conditions are met:

●

The system detects lane lines and the

path of preceding or surrounding vehi-

cles.

●

The dynamic radar cruise control and the

lane tracing assist are operating.

●

The turn signal lever is not being oper-

ated.

●

The vehicle is not being driven around a

sharp curve.

●

The vehicle is being driven in the center

of a lane.

●

The driver monitor camera is detecting

that the driver is facing front of the vehi-

cle.

●

The vehicle is driving in traffic jam on a

highway or expressway at approximately

25 mph (40 km/h) or less. (In some situ-

ations, such as when a traffic jam starts,

this function may be operational at

approximately 20 mph [30 km/h] or

less.)

●

Vehicles with a connected navigation

(display audio): Safety Connect is being

subscribed to.

●

The driver’s door is closed.

●

The driver’s seat belt is fastened.

●

Customized setting of the Traffic Jam

Assist is not set to off.

●

Functions and components composing

the system are in proper condition.

●

Customized setting of the PCS (Pre-Col-

lision System) is not set to off.

●

Customized setting of the dynamic radar

cruise control (re-start time extension) is

not set to off.

■

Temporary cancelation of the function

●

When the operating conditions are no

longer met, a function may be temporar-

ily canceled. However, when the opera-

tion conditions are met again, operation

of the function will automatically be

restored.

●

If the operating conditions of a function

are no longer met while the function is

operating, a buzzer may sound with a dis-

play to indicate that the function has been

temporarily canceled. If no driver’s

responses to the indication are detected,

the driver emergency stop assist function

may operate. For types of display and

action to be taken, see the page men-

tioned below. (

P.294)

■

Driving operations during controlled

driving

●

Accelerator pedal

As with normal driving, acceleration can
be performed by depressing the accelera-
tor pedal. In some situations, such as when
driving at approximately 6 mph (10 km/h)
or more and the accelerator pedal is
depressed, this function will be canceled.

●

Brake pedal

As with normal driving, deceleration can
be performed by depressing the brake
pedal. However, controlled driving will be
cancelled.

●

Steering wheel

As with normal driving, the steering wheel

WARNING

●

When there is a significant difference

in speed between your vehicle and the

other vehicle

●

The map data has not been updated

properly.

■

To prevent malfunction of the radar

sensors



P.231

■

To prevent malfunction of the front

camera



P.232

■

Front camera installation area on the

windshield



P.233

294

4-5. Using the driving support systems

can be operated. If the steering wheel is
operated more than a certain amount, con-
trolled driving will be cancelled.

■

When a warning message is displayed

●

“Traffic Jam Asst System Malfunction

Visit Your Dealer”

The Traffic Jam Assist function may not be
operating properly.

●

“Traffic Jam Asst Unavailable Stop Assist

Activated”

The system temporarily cannot be used as
the driver emergency stop assist function
has operated.



The setting of Traffic Jam Assist can
be enabled/disabled through a cus-
tomize setting. (





The setting of driver monitor cam-
era recording can be enabled/dis-
abled through a customize setting.
(

The following displays indicate the operating status of the Traffic Jam Assist func-
tion:

Changing Traffic Jam Assist set-
tings

Displays and system operation

Display

Status

Action to be taken

Traffic Jam Assist function is
operating



(Grey)

Traffic Jam Assist function is
about to end

Hold the steering wheel.

(Orange)

Traffic Jam Assist function has
ended

Hold the steering wheel.

(Red)

Operation of either or both of
dynamic radar cruise control
/LTA (Lane Tracing Assist)
ended

Manually operate the steering
wheel immediately.

296

4-5. Using the driving support systems

■

Stopping the engine

While driving with the D shift position
selected, depress the brake pedal and
stop the vehicle. The engine will stop
automatically.

When the engine stops, the Stop & Start
indicator will illuminate.

■

Restarting the engine

Release the brake pedal. The engine
will start automatically.

When the engine starts, the Stop & Start
indicator will turn off.

■

When the brake hold system is
operating



When the engine is stopped by the
Stop & Start system, if the brake

pedal is released the engine will
remain stopped.



If the accelerator pedal is depressed
while the engine is stopped by the
Stop & Start system, the engine will
restart.



While the engine is stopped by the
Stop & Start system, if the engine is
restarted, the brake hold system will
continue to apply the brakes, unless
the operation conditions of the
brake hold system are no longer
met. (



P.207)

■

When the dynamic radar cruise
control is operating



When the vehicle is stopped by the
dynamic radar cruise control, the
engine will stop automatically even
though the brake pedal is not
depressed.



When the preceding vehicle starts
off, the engine will restart automati-
cally.



If the engine is restarted by the Stop
& Start system while the vehicle is
stopped by the dynamic radar
cruise control, the vehicle will
remain stopped.

Press the Stop & Start cancel switch to
disable the Stop & Start system.

The Stop & Start cancel indicator will illu-
minate.
Pressing the switch again will enable the
Stop & Start system and the Stop & Start

Stop & Start system

The Stop & Start system stops and
starts the engine according to
brake pedal or shift lever operation
when the vehicle is stopped, such as
at a stoplight, intersection, etc., in
order to improve fuel economy and
reduce noise pollution caused by
the engine idling.

Stop & Start system operation

Disabling the Stop & Start sys-
tem

297

4-5. Using the driving support systems

Driving

cancel indicator will turn off.



Vehicles without downhill assist con-
trol system



Vehicles with downhill assist control
system

■

Automatic enabling of the Stop & Start

system

If the Stop & Start system is disabled using

the Stop & Start cancel switch, it will be

automatically re-enabled once the engine

switch is turned off and then the engine is

started.

When the engine is stopped by the
Stop & Start system when the vehicle is
on an incline, when the brake pedal is
released, brake force is temporarily
maintained to prevent the vehicle from
rolling backwards before the engine is
restarted and drive force is generated.
When drive force is generated, the

maintained brake force is automatically
canceled.



This function operates on flat sur-
faces as well as steep inclines.



Sound may be generated from the
brake system, but this does not indi-
cate a malfunction.



Brake pedal response may change
and vibration may occur, but this
does not indicate a malfunction.

■

Points for use

●

If the engine switch is pressed when the

engine is stopped by the Stop & Start sys-

tem, the engine will not be able to be

restarted by the automatic engine start

function. In this case, restart the engine

using the normal engine starting proce-

dure. (

P.194)

●

When the engine is being restarted by

the Stop & Start system, the power out-

lets may be temporarily unusable, but this

does not indicate a malfunction.

●

Installation and removal of electrical

components and wireless devices may

affect the Stop & Start system. Contact

your Lexus dealer for details.

●

When stopping the vehicle for a longer

period of time, turn the engine switch off

to stop the engine completely.

●

When the engine is restarted by the Stop

& Start system, the steering wheel may

temporarily feel heavy.

■

Operating conditions

●

The Stop & Start system is operational

when all of the following conditions are

met:

• The vehicle has been driven a certain

amount of time.

• The brake pedal is being depressed

firmly. (Except when the vehicle is

stopped by the dynamic radar cruise

control when in vehicle-to-vehicle dis-

tance control mode)

• The D shift position is selected.

• The driver’s seat belt is fastened.

Hill-start assist control

298

4-5. Using the driving support systems

• The driver’s door is closed.

• The windshield defogger is off.

• The accelerator pedal is not being

depressed.

• The engine is adequately warmed up.

• The hood is closed. (



P.298)

●

In the following situations the engine may

not be stopped by the Stop & Start sys-

tem. This is not a malfunction of the Stop

& Start system.

• When the air conditioning system is

being used.

• When the battery is undergoing a peri-

odic recharge.

• When the battery is not sufficiently

charged, such as if the vehicle has been

parked for a long time and the battery

charge has decreased, the electric load is

large, the battery fluid temperature is

excessively low or the battery has deteri-

orated.

• When the brake booster vacuum is low.

• When the elapsed time since the engine

was restarted is short.

• When the vehicle is stopped frequently,

such as when in a traffic jam.

• When the engine coolant temperature or

transmission fluid temperature is

extremely low or high.

• When the vehicle is stopped on a steep

incline.

• When the vehicle is being driven in a high

altitude area.

• When the battery fluid temperature is

extremely low or high.

• For a while after the battery have been

replaced

●

When the engine is stopped by the Stop

& Start system, the engine will be

restarted automatically if any of the fol-

lowing conditions are met: (To enable the

engine to be stopped by the Stop & Start

system again, drive the vehicle.)

• The air conditioning system is being used.

• The windshield defogger is turned on.

• The shift lever is shifted from D or P.

• The shift lever is shifted from P. (When

the engine is stopped by the Stop & Start

system when the shift lever is in P.)

• The driver’s seat belt is unfastened.

• The driver’s door is opened.

• The Stop & Start cancel switch is pressed.

• Advanced Park is operated. (if equipped)

• The accelerator pedal is depressed.

• The vehicle starts to roll on an incline.

●

When the engine is stopped by the Stop

& Start system, the engine may restart

automatically in the following situations:

(To enable the engine to be stopped by

the Stop & Start system again, drive the

vehicle.)

• When the brake pedal is pumped or

strongly depressed.

• When the air conditioning system is

being used.

• When a switch of the air conditioning sys-

tem is operated (windshield defogger

switch, etc.).

• If the battery charge becomes low.

■

When the hood is opened

●

If the hood is opened while the engine is

stopped by the Stop & Start system, the

engine will stall and will not be able to be

restarted by the automatic engine start

function. In this case, restart the engine

using the normal engine starting proce-

dure. (

P.194)

●

If the hood is closed after the engine is

started with the hood open, the Stop &

Start system will not operate. Close the

hood, turn the engine switch off, wait 30

seconds or more, and then start the

engine.

■

Air conditioning system operation while

the engine is stopped by the Stop &

Start system

When the air conditioning is in automatic

mode and the engine is stopped by the Stop

& Start system, the fan may operate at a low

speed in order to prevent the temperature

in the cabin from increasing or decreasing

or may be stopped.
To prioritize air conditioning system perfor-

mance when the vehicle is stopped, disable

the Stop & Start system by pressing the

Stop & Start cancel switch.

●

If the windshield is fogged up

Turn the windshield defogger on.
(

P.385)

If the windshield fogs up frequently, press
the Stop & Start cancel switch to disable
the Stop & Start system.

299

4-5. Using the driving support systems

Driving

●

If an odor is emitted from the air condi-

tioning system

Press the Stop & Start cancel switch to
deactivate the Stop & Start system.

■

Changing the idling stop time with the

air conditioning system on

The length of time the Stop & Start system

will operate when the air conditioning sys-

tem is on can be changed on the center dis-

play. (The length of time the Stop & Start

system will operate when the air condition-

ing system is off cannot be changed.)

Select .

Select “Vehicle customize”.

Select “Utility”.

Select “Stop & Start duration”.

Select “Standard” or “Extended”.

■

Multi-information display messages

If the following situations,

and a mes-

sage may be displayed on the multi-infor-

mation display.

●

When the engine cannot be stopped by

the Stop & Start system

“Press Brake More to Activate”

• The brake pedal is not sufficiently

depressed.



If the brake pedal is depressed further,

the system will operate.

“Non-Dedicated Battery”

• A battery not designed for use with a

Stop & Start system may have been

installed.



Have the vehicle inspected by your

Lexus dealer.

“Battery Charging”

• The battery charge may be low.



Stopping of the engine is temporarily

prohibited to prioritize charging of the bat-
tery. After the engine runs for a certain
amount of time, the system will be enabled.
• A refresh charge may be being per-

formed, such as during a periodic

recharge, after the battery terminals have

been disconnected and reconnected,

after the battery has been replaced, etc.



After a refresh charge for up to an hour

completes, the system can be operated.
• If displayed continuously for a long time

(more than an hour)



The battery may be deteriorated. Con-

tact your Lexus dealer for details.

“Stop & Start system unavailable”

• The Stop & Start system is temporarily

disabled.



Allow the engine to run for some time.

• The engine may have been started with

the hood open.



Close the hood, turn the engine switch

off, wait for 30 seconds or more, and then
start the engine.

“In Preparation”

• The vehicle is being driven in a high alti-

tude area.

• The brake booster vacuum is low.



When the brake booster vacuum

reaches a predetermined level, the system
will be enabled.

“For Climate Control”

• The air conditioning system is being used

when the ambient temperature is high or

low.

If the difference between the set tempera-
ture and cabin temperature becomes
small, the system will be enabled.
• The windshield defogger is on.

●

When the engine automatically restarts

while stopped by the Stop & Start system

“In Preparation”

• The brake pedal has been depressed fur-

ther or pumped.



The system will be enabled after the

engine runs and the brake booster vacuum
reaches a predetermined level.

300

4-5. Using the driving support systems

“For Climate Control”

• The air conditioning system is being used.
• The windshield defogger has been

turned on.

“Battery Charging”

• The battery charge may be low.



The system will be enabled after the

engine runs to sufficiently charge the bat-
tery.

■

When the buzzer sounds

If the driver’s door is opened when the

engine is stopped by the Stop & Start sys-

tem and the shift lever is in D, a buzzer will

sound and the Stop & Start system indicator

will flash. To stop the buzzer, close the

driver’s door.

■

The Stop & Start system protection

function

●

When the volume of the audio system is

excessively high, sound output from the

audio system may suddenly be cut off in

order to reduce battery consumption. To

prevent the audio system from being cut

off, keep the volume of audio system at a

moderate level. If the audio system has

been cut off, turn the engine switch off,

wait for 3 seconds or more and then turn

it to ACC or ON to re-enable the audio

system.

●

The audio system may not be activated if

the battery terminals are disconnected

and then reconnected. If this occurs, turn

the engine switch off and then repeat the

following operation twice to activate the

audio system normally.

• Turn the engine switch to ON and then to

off.

■

Replacing the battery

P.517

■

If the Stop & Start cancel indicator

flashes continuously

The system may be malfunctioning. Have

the vehicle inspected by your Lexus dealer.

■

If “Stop & Start System Malfunction

Visit Your Dealer” is displayed on the

multi-information display

The system may be malfunctioning. Have

the vehicle inspected by your Lexus dealer.

WARNING

■

When the Stop & Start system is

operating

Make sure to disable the Stop & Start

system while the vehicle is in a poorly

ventilated area. If not disabled, the

engine may be automatically restarted

unexpectedly, causing exhaust gases to

collect and enter the vehicle, possibly

resulting in death or a serious health haz-

ard.

●

Do not leave the vehicle while the

engine is stopped by the Stop & Start

system (while the Stop & Start indica-

tor is on). An accident may occur due

to the automatic engine start function.

●

Depress the brake pedal and apply the

parking brake when necessary while

the engine is stopped by the Stop &

Start system (while the Stop & Start

indicator is on).

NOTICE

■

To ensure the system operates cor-

rectly

If any of the following situations occur,

the Stop & Start system may not operate

correctly. Have your vehicle inspected by

your Lexus dealer.

●

While the driver’s seat belt is fastened,

the driver’s and front passenger’s seat

belt reminder light flashes.

●

Even though the driver’s seat belt is not

fastened, the driver’s and front passen-

ger’s seat belt reminder light does not

illuminate.

301

4-5. Using the driving support systems

Driving

Center display

Turning the Blind Spot Monitor on/off.

NOTICE

●

Even though the driver’s door is

closed, the open door warning light is

illuminated or the interior light is illumi-

nated when the interior light switch is

in the door position.

●

Even though the driver’s door is open,

the open door warning light does not

illuminate or the interior light does not

illuminate when the interior light switch

is in the door position.

BSM (Blind Spot Monitor)

The Blind Spot Monitor is a system
that uses rear side radar sensors
installed on the inner side of the
rear bumper on the left and right
side to assist the driver in confirm-
ing safety when changing lanes.

WARNING

■

Cautions regarding the use of the sys-

tem

●

The driver is solely responsible for safe

driving. Always drive safely, taking

care to observe your surroundings.

●

The Blind Spot Monitor is a supple-

mentary function which alerts the

driver that a vehicle is in a blind spot of

the outside rear view mirrors or is

approaching rapidly from behind into a

blind spot. Do not overly rely on the

Blind Spot Monitor. As the function

cannot judge if it is safe to change

lanes, over reliance could lead to an

accident resulting in death or serious

injury.

As the system may not function cor-

rectly under certain conditions, the

driver’s own visual confirmation of

safety is necessary.

System components

302

4-5. Using the driving support systems

Outside rear view mirror indica-
tors/buzzer

When a vehicle is detected in a blind spot
of the outside rear view mirrors or
approaching rapidly from behind into a
blind spot, the outside rear view mirror
indicator on the detected side will illumi-
nate. If the turn signal lever is operated
toward the detected side, the outside rear
view mirror indicator will flash and a
buzzer will sound.

Driving assist information indicator

Illuminates when the Blind Spot Monitor is
turned off. At this time, “Blind Spot Monitor
OFF” will be displayed on the multi-infor-
mation display.

■

Outside rear view mirror indicator visi-

bility

In strong sunlight, the outside rear view mir-

ror indicator may be difficult to see.

■

Buzzer

If the volume setting of the audio system is

high or the surrounding area is loud, it may

be difficult to hear the buzzer.

■

Customization

Some functions can be customized.

(



WARNING

■

To ensure the system can operate

properly

Blind Spot Monitor sensors are installed

behind the left and right sides of the rear

bumper respectively. Observe the fol-

lowing to ensure the Blind Spot Monitor

can operate correctly.

●

Keep the sensors and the surrounding

areas on the rear bumper clean at all

times.

If a sensor or its surrounding area on the
rear bumper is dirty or covered with
snow, the Blind Spot Monitor may not
operate and a warning message will be
displayed. In this situation, clear off the
dirt or snow and drive the vehicle with
the operation conditions of the BSM
function (



P.304) satisfied for approxi-

mately 10 minutes. If the warning mes-
sage does not disappear, have the
vehicle inspected by your Lexus dealer.

●

Do not attach accessories, stickers

(including transparent stickers), alumi-

num tape, etc. to a sensor or its sur-

rounding area on the rear bumper.

●

Do not subject a sensor or its sur-

rounding area on the rear bumper to a

strong impact.

If a sensor is moved even slightly off

position, the system may malfunction

and vehicles may not be detected cor-

rectly.

In the following situations, have your

vehicle inspected by your Lexus

dealer.

• A sensor or its surrounding area is

subject to a strong impact.

• If the surrounding area of a sensor is

scratched or dented, or part of them

has become disconnected.

●

Do not disassemble the sensor.

●

Do not modify the sensor or surround-

ing area on the rear bumper.

303

4-5. Using the driving support systems

Driving

The blind spot monitor can be

enabled/disabled on

of the center

display. (

When the Blind Spot Monitor is off, the
driving assist information indicator
(

P.76) will illuminate. At this time,

“Blind Spot Monitor OFF” will be dis-
played on the multi-information dis-
play.
Each time the engine switch is turned
to ON, the Blind Spot Monitor is
enabled.

■

Objects that can be detected while driving

The Blind Spot Monitor uses rear side radar sensors to detect the following vehi-
cles traveling in adjacent lanes and advises the driver of the presence of such vehi-
cles via the indicators on the outside rear view mirrors.

Vehicles that are traveling in areas that are not visible using the outside rear
view mirrors (the blind spots)
Vehicles that are approaching rapidly from behind in areas that are not visible
using the outside rear view mirrors (the blind spots)

■

Detection range while driving

The areas that vehicles can be detected in are outlined below.

WARNING

●

If a sensor or the rear bumper needs to

be removed/installed or replaced,

contact your Lexus dealer.

●

The sensors are likely to be affected by

paint on the rear bumper. If the rear

bumper is not repaired correctly, the

Blind Spot Monitor may not operate

with a warning message displayed. If

any paint repair is needed, contact

your Lexus dealer.

Turning the Blind Spot Monitor
on/off

Blind Spot Monitor operation

304

4-5. Using the driving support systems

The range of each detection area is:

Approximately 1.6 ft. (0.5 m) to 11.5 ft. (3.5 m) from either side of the vehicle

Approximately 3.3 ft. (1 m) forward of the rear bumper

Approximately 9.8 ft. (3 m) from the rear bumper

Approximately 9.8 ft. (3 m) to 230 ft. (70 m) from the rear bumper

: The area between the side of the vehicle and 1.6 ft. (0.5 m) from the side of the vehicle

cannot be detected.

: While the vehicle is to being overtaken, up to approximately 9.8 ft. (3 m) forward of the

rear bumper will be detected.

: The greater the difference in speed between your vehicle and the detected vehicle is,

the farther away the vehicle will be detected, causing the outside rear view mirror indi-
cator to illuminate or flash.

■

The Blind Spot Monitor linked
function

The LDA (Lane Departure Alert) has a
function that uses information of
detected vehicles driving in an adja-
cent lane. For details about the function
and its operating conditions, P.256

■

The Blind Spot Monitor is operational

when

The Blind Spot Monitor is operational when

all of the following conditions are met:

●

The engine switch is in ON.

●

The Blind Spot Monitor is on.

●

The shift position is in a position other

than R.

●

The vehicle speed is greater than approx-

imately 7 mph (10 km/h).

■

The Blind Spot Monitor will detect a

vehicle when

The Blind Spot Monitor will detect a vehicle

present in the detection area in the follow-

ing situations:

●

A vehicle in an adjacent lane overtakes

your vehicle.

●

You overtake a vehicle in an adjacent lane

slowly.

●

Another vehicle enters the detection

area when it changes lanes.

■

Situations in which the blind spot moni-

tor cannot detect vehicles.

The blind spot monitor cannot detect the

following vehicles and other objects:

●

Small motorcycles, bicycles, pedestrians,
etc.

●

Vehicles traveling in the opposite direc-

tion

●

Guardrails, walls, signs, parked vehicles

A
B
C
D

305

4-5. Using the driving support systems

Driving

and similar stationary objects

●

Following vehicles that are in the same
lane

●

Vehicles traveling 2 lanes away from your
vehicle

●

Vehicles which are being overtaken rap-
idly by your vehicle

: Depending on the conditions, detection

of a vehicle and/or object may occur.

■

Conditions under which the System may

not function correctly

●

The Blind Spot Monitor may not detect

vehicles correctly in the following situa-

tions:

• When the sensor is misaligned due to a

strong impact to the sensor or its sur-

rounding area

• When mud, snow, ice, a sticker, etc. is

covering the sensor or surrounding area

on the rear bumper

• When driving on a road surface that is

wet with standing water during bad

weather, such as heavy rain, snow, or fog

• When multiple vehicles are approaching

with only a small gap between each vehi-

cle

• When the distance between your vehicle

and a following vehicle is short

• When there is a significant difference in

speed between your vehicle and the vehi-

cle that enters the detection area

• When the difference in speed between

your vehicle and another vehicle is

changing

• When a vehicle enters a detection area

traveling at about the same speed as your

vehicle

• As your vehicle starts from a stop, a vehi-

cle remains in the detection area

• When driving up and down consecutive

steep inclines, such as hills, dips in the

road, etc.

• When driving on roads with sharp bends,

consecutive curves, or uneven surfaces

• When vehicle lanes are wide, or when

driving on the edge of a lane, and the

vehicle in an adjacent lane is far away

from your vehicle

• When an accessory (such as a bicycle

carrier) is installed to the rear of the vehi-

cle

• When there is a significant difference in

height between your vehicle and the

vehicle that enters the detection area

• Immediately after the Blind Spot Monitor

is turned on

• When towing with the vehicle

●

Instances of the Blind Spot Monitor

unnecessarily detecting a vehicle and/or

object may increase in the following situ-

ations:

• When the sensor is misaligned due to a

strong impact to the sensor or its sur-

rounding area

• When the distance between your vehicle

and a guardrail, wall, etc. that enters the

detection area is short

• When driving up and down consecutive

steep inclines, such as hills, dips in the

road, etc.

• When vehicle lanes are narrow, or when

driving on the edge of a lane, and a vehi-

cle traveling in a lane other than the adja-

cent lanes enters the detection area

• When driving on roads with sharp bends,

consecutive curves, or uneven surfaces

• When the tires are slipping or spinning

• When the distance between your vehicle

and a following vehicle is short

• When an accessory (such as a bicycle

carrier) is installed to the rear of the vehi-

cle

• When towing with the vehicle

306

4-5. Using the driving support systems

Center display

Turning the safe exit assist on/off.

Outside rear view mirror indicators

When a vehicle or bicycle which may col-
lide with a door (other than the back door)
when opened is detected, the outside rear
view mirror indicator on the detected side
will illuminate. If the door on the detected
side is open, or opening of the door is can-
celed, the outside rear view mirror indica-
tor will blink.

Meter

If collision with a door is likely and the door
is opened or opening of the door is can-
celed, the door will be displayed on the
multi-information display. Also, if a door is
opened when an outside rear view mirror
indicator is illuminated, a buzzer will sound
as a warning.

Driving assist information indicator

Illuminates when the safe exit assist is
turned off. At this time, “Safe Exit Assist
OFF” will be displayed on the multi-infor-
mation display.

Speakers

When the outside rear view mirror indica-
tor blinks, the driver is informed through
voice guidance that the system has oper-
ated. After the notification through voice
guidance is made, no more voice guidance
notifications will be made again until the
door is fully closed.

Door opener switch (manual
release handle)

If a door opener switch is operated to open
a door while the outside rear view mirror
indicator on that side is illuminated, open-
ing of the door will be canceled.

Safe Exit Assist

The safe exit assist (with door open-
ing control) is a system that uses
rear side radar sensors installed on
the inner side of the rear bumper to
help occupants judge if an
approaching vehicle or bicycle may
collide with a door when exiting or
cancel opening of a door, to help
reduce the possibility of a collision.

WARNING

■

Cautions regarding the use of the sys-

tem

●

The driver is solely responsible for safe

driving. Always drive safely, taking

care to observe your surroundings.

●

The safe exit assist is a supplementary

system that, when the vehicle is

stopped, informs occupants of the

existence of approaching vehicles and

bicycles. As this system alone cannot

be used to judge safety, over-reliance

on this system may lead to an accident

resulting in death or serious injury.

In certain situations, this system may not

function to its fullest extent. Therefore it is

necessary for the occupants to visually

check for safety directly and using the

mirrors.

System components

307

4-5. Using the driving support systems

Driving

■

Outside rear view mirror indicator visi-

bility

In strong sunlight, the outside rear view mir-

ror indicator may be difficult to see.

■

Buzzer

If the volume setting of the audio system is

high or the surrounding area is loud, it may

be difficult to hear the buzzer.

■

Voice notifications

In the following situations, voice notifica-

tions will not be output:

●

When it is estimated that no occupants
are on board

●

After opening a door and entering the

vehicle, until the engine is started

●

When 3 minutes or more have elapsed

since the engine was stopped

●

When the language setting of the center

display has been set to a language that

does not support voice notifications

●

When all of the doors have been locked

from outside the vehicle

●

When a door remains open for 1 minute

or more after the engine is stopped

●

When the ACC mode (



P.543) has

been enabled through a customize set-

ting on the center display and the engine

has been stopped

●

When the parking assist volume setting

on the center display has been set to off

: For each seating position, judgment is

made based on the opening and closing
of a door, before driving for ingress and

after driving for egress.

■

Opening of a door can be canceled

when

Opening of a door can be canceled only

when the inside door opener switch is

pushed in. Opening of a door will not be

able to be canceled when the outside door

opener switch is used.

■

Customization

Some functions can be customized.

(

The safe exit assist can be enabled/dis-
abled on

of the center display.

(

When the safe exit assist is off, the driv-
ing assist information indicator will illu-
minate. At this time, “Safe Exit Assist
OFF” will be displayed on the
multi-information display.
Each time the engine switch is turned
to ON, the safe exit assist is enabled.

■

Objects that can be detected by the safe exit assist

When the safe exit assist detects the following vehicles or bicycles behind your
vehicle using a rear side radar sensor, the occupants of the vehicle are informed
through an outside rear view mirror indicator, buzzer, multi-information display,
and voice notification.

WARNING

■

To ensure the system can operate

properly