sensor TOYOTA BZ4X 2022 (in English) Service Manual

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5-4. Using the driving support systems
When driving on a road with
clear lane lines with the dynamic
radar cruise control operating,
lane lines and preceding and
surrounding vehicles are
detected using the front camera
and radar sensor, and the steer-
ing wheel is operated to maintain
the vehicle’s lane position.
Use the this function only on highways
and expressways.
If the dynamic radar cruise control is
not operating, the function will not oper-
ate.
In situations where the lane lines are
difficult to see or are not visible, such as
when in a traffic jam, support will be
provided using the path of preceding
and surrounding vehicles.
If the system determines that the steer-
ing wheel has not been operated for a
certain amount of time or the steering
wheel is not being firmly gripped, the
driver will be alerted via a display and
this function will be temporarily can-
celed.
If the steering wheel is firmly gripped,
the function will begin operating again.
 When the function is operating, if
the vehicle is likely to depart from
its lane, the driver will be alerted
via a display and buzzer.
When the buzzer sounds, check the
area around the vehicle and carefully
operate the steering wheel to move the
vehicle back to the center of the lane.
LTA (Lane Tracing
Assist)
LTA functions

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5-4. Using the driving support systems
Driving
The operating state of the LTA system is indicated.
WARNING
●When a preceding or surrounding vehicle departs from a lane (Your
vehicle may follow the preceding or surrounding vehicle and also depart from the lane)
●When a preceding or surrounding vehicle is being driven extremely
close to the left/right lane line (Your vehicle may follow the preceding or surrounding vehicle accordingly
and depart from the lane)
●When there are moving objects or
structures in the surrounding area (Depending on the position of the moving object or structure relative
to your vehicle, your vehicle may sway)
●When the vehicle is struck by a crosswind or the turbulence of other nearby vehicles
●Situations in which the sensors may not operate properly: P. 2 7 9
●Situations in which the lane may not be detected: P. 2 8 1
●When it is necessary to disable the system: P.275
Operation display of steering wheel operation support
IndicatorLane displaySteering iconSituation
WhiteGrayGrey
LTA is on standby

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5-4. Using the driving support systems
Depending on the condition of the vehi-
cle and road surface, the break sugges- tion function may not operate.
 The LDA system can be
enabled/disabled through a cus-
tomize setting. ( P.568)
 The settings of the LDA can be
changed through on the custom-
ize settings. ( P.568)
The operating state of the lane departure alert function and st eering assist
operation of the lane departure prevention function are indicat ed.
Changing LDA settings
WARNING
■Situations in which the LDA should not be used
In the following situations, disable the LDA system. Failure to do so may lead to an accident.
●When it is necessary to disable the system: P.275
■Situations in which the system may not operate properly
In the following situations, the system
may not operate properly and the vehicle may depart from its lane. Do not overly rely on these functions. The
driver is solely responsible for paying attention to their surroundings and operating the steering wheel as nec-
essary to ensure safety.
●When the boundary between the
asphalt and grass, soil, etc., or structures, such as a curb, guard-rail, etc. is not clear or straight
●When the vehicle is struck by a crosswind or the turbulence of other
nearby vehicles
●Situations in which the lane may not
be detected: P. 2 8 1
●Situations in which the sensors may
not operate properly: P.279
●Situations in which some or all of
the functions of the system cannot operate: P. 2 8 1
Displays and system operation

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5-4. Using the driving support systems
When the front camera detects a
sign or information of a sign is
available from the navigation
system (if equipped), the sign will
be displayed on the display.
 Multiple signs can be displayed.
Depending on the specifications of the
vehicle, the number of displayed signs
may be limited.
■Operating conditions of sign dis- play
Signs will be displayed when the follow-
ing conditions are met:
●The system has detected a sign
In the following situations, a displayed sign may stop being displayed:
●When a new sign has not been detected for a certain distance
●When the system determines that the road being driven on has changed, such as after a left or right turn
■Situations in which the display
function may not operate properly
In the following situations, the RSA sys- tem may not operate properly and may
not detect signs or may display the incorrect sign. However, this does not indicate a malfunction.
●When a sign is dirty, faded, tilted or bent
●When the contrast of an electronic sign is low
●When all or part of a sign is hidden by a tree, utility pole, etc.
●When a sign is detected by the front
camera for a short amount of time
●When the driving state (turning,
changing lanes, etc.) is judged incor- rectly
●When a sign is immediately after a freeway junction or in an adjacent lane just before merging
●When stickers are attached to the rear of a preceding vehicle
●When a sign similar to a system com-patible sign is detected as a system
compatible sign
●When a speed limit sign for a frontage
road is within detection range of the front camera
RSA (Road Sign Assist)
The RSA system detects spe-
cific road signs using the front
camera and/or navigation sys-
tem (if equipped) (when speed
limit information is available)
and warns the driver via dis-
plays and buzzers.
WARNING
■For safe use
●Driving safely is solely the responsi- bility of the driver. Pay careful atten-tion to the surrounding conditions in
order to ensure safe driving.
●Do not rely solely upon the RSA.
The RSA assists the driver by pro- viding road sign information, but it is not a replacement for the driver’s
own vision and awareness. Driving safely is solely the responsibility of the driver. Pay careful attention to
the surrounding conditions in order to ensure safe driving.
■Situations in which the RSA should not be used
When it is necessary to disable the
system: P. 2 7 5
■Situations in which the system
may not operate properly
Situations in which the sensors may not operate properly: P. 2 7 9
Display Function

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5-4. Using the driving support systems
WARNING
●Even if the system is operating cor- rectly, the condition of a preceding
vehicle 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-reli-ance on this system to drive the
vehicle safely may lead to an acci- dent resulting in death or serious injury.
■Precautions for the driving assist systems
Observe the following precautions, as there are limitations to the assistance provided by the system. Over-reliance
on this system may lead to an acci- dent resulting in death or serious injury.
●Details of support provided for the driver’s vision The dynamic radar
cruise control is only intended to help the driver in determining the distance between the driver’s own
vehicle and a designated preceding vehicle. It is not a system which allows for careless or inattentive
driving, and is not a system which assists in poor visibility conditions. The driver must pay attention to
their surroundings, even when the vehicle stops.
●Details of support provided for the driver’s judgement The dynamic radar cruise control determines
whether the distance between the driver’s own vehicle and a desig-nated preceding vehicle is within a
set range. It is not capable of mak- ing any other type of judgement. Therefore, it is absolutely neces-
sary for the driver to remain vigilant and to determine whether or not there is a possibility of danger.
●Details of support provided for the driver’s operation The dynamic radar cruise control does not
include functions which will prevent or avoid collisions with vehicles ahead of your vehicle. Therefore, if
there is ever any possibility of dan- ger, the driver must take immediate and direct control of the vehicle and
act appropriately in order to ensure safety.
■Situations in which the dynamic radar cruise control should not be used
Do not use the dynamic radar cruise control in the following 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.
●Roads where there are pedestrians, cyclists, etc.
●When driving on a highway or expressway entrance or exit
●When the approach warning sounds frequently
●Situations in which the sensors may not operate properly: P.279
●Situations in which the lane may not be detected: P. 2 8 1

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5-4. Using the driving support systems
Driving
■Dynamic radar cruise control sys-
tem warning messages and buzz- ers
For safe use: P. 2 7 5
■Preceding vehicles that the sensor
may not detect correctly
In the following situations, depending on the conditions, if the system cannot pro-
vide sufficient deceleration or accelera- tion is necessary, operate the brake pedal or accelerator pedal.
As the sensor may not be able to cor- rectly detect these types of vehicles, the approach warning ( P.313) may not
operate.
●When a vehicle cuts in front of your
vehicle 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, depending on the situation) as neces-
sary.
As the sensor may not be able to cor- rectly detect a vehicle, the system may
not operate properly.
●When a preceding vehicle brakes sud-
denly
●When changing lanes at low speeds,
such as in a traffic jam
In situations where the vehicle
approaches a preceding vehicle
and the system cannot provide suf-
ficient 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 vehicle-to-vehicle dis-
tance.
■Warnings may not occur when
In the following situations, the
warning may not operate even
though the vehicle-to-vehicle dis-
tance is short.
 When the preceding vehicle is
traveling at the same speed or
faster than your vehicle
 When the preceding vehicle is
traveling 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 vehi-
cle 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
distance control needs to operate, such
as when a preceding vehicle cuts in
front of your vehicle, the curve speed
reduction function will be canceled.
Approach warning
Curve speed reduction func-
tion

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5-4. Using the driving support systems
1Press the cancel switch or driv-
ing assist switch to cancel con-
trol.
Control will also be canceled if the brake pedal is depressed.
2 Press the “RES” switch to
resume control.
■Automatic cancelation of the cruise
control
In the following situations, the cruise control will be canceled automatically:
●When the vehicle speed drops approximately 16 km/h (10 mph) or
more below the set vehicle speed
●When the vehicle speed drops below
approximately 30 km/h (20 mph)
●When the brake control or output
restriction control of a driving support system operates (For example: PCS, drive-start control)
●When the parking brake has been operated
●Situations in which some or all of the functions of the system cannot oper-
ate: P. 2 8 1
*: If equipped
■Meter display
Set vehicle speed
Speed limiter indicator
Speed limiter*
A desired maximum speed can
be set using the speed limiter
switch. The speed limiter pre-
vents the vehicle speed from
exceeding the set speed.
WARNING
■Situations in which speed limiter should not be used
●Situations in which the sensors may
not operate properly: P.279
●When it is necessary to disable the
system: P.275
System Components

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5-4. Using the driving support systems
*: If equipped
Meter control switches
Turning the Blind Spot Monitor on/off.
Outside rear view mirror indica-
tors
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 flashes.
Driving assist information indica-
tor
Illuminates when the Blind Spot Monitor
is turned off. At this time, “Blind Spot
Monitor OFF” will be displayed on the
multi-information display.
■Outside rear view mirror indicator
visibility
In strong sunlight, the outside rear view mirror indicator may be difficult to see.
■Customization
Some functions can be customized. ( P.570)
■Certification
 P. 6 4 3
BSM (Blind Spot Moni-
tor)*
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 confirming
safety when changing lanes.
WARNING
■Cautions regarding the use of
the system
●The driver is solely responsible for safe driving. Always drive safely,
taking care to observe your sur- roundings.
●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 Moni-tor. As the function cannot judge if it
is safe to change lanes, over reli- ance 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

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5-4. Using the driving support systems
Driving
The blind spot monitor can be
enabled/disabled on of the
multi-information display. ( P.176)
When the Blind Spot Monitor is off, the
driving assist information indicator
( P.169) will illuminate. At this time,
“Blind Spot Monitor OFF” will be dis-
played on the multi-information display.
Each time the power switch is turned to
ON, the Blind Spot Monitor is enabled.
WARNING
■To ensure the system can oper- ate properly
Blind Spot Monitor sensors are installed behind the left and right sides of the rear bumper respectively.
Observe the following to ensure the Blind Spot Monitor can operate cor-rectly.
●Keep the sensors and the sur-rounding areas on the rear bumper
clean at all times.
If a sensor or its surrounding area on
the rear bumper is dirty or covered
w i t h s n o w, t h e B l i n d S p o t M o n i t o r m a y
not operate and a warning message
( P.524) will be displayed. In this sit-
uation, clear off the dirt or snow and
drive the vehicle with the operation
conditions of the BSM function
( P.327) satisfied for approximately
10 minutes. If the warning message
does not disappear, have the vehicle
inspected by any authorized Toyota
retailer or Toyota authorized repairer,
or any reliable repairer.
●Do not attach accessories, stickers
(including transparent stickers), alu- minum tape, etc., to a sensor or its surrounding 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 mal-function and vehicles may not be
detected correctly. In the following situations, have your vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
• 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 sur-rounding area on the rear bumper.
●If a sensor or the rear bumper needs to be removed/installed or replaced, contact any authorized
Toyota retailer or Toyota authorized repairer, or any reliable repairer.
●Do not paint the rear bumper any color other than an official Toyota color.
Turning the Blind Spot Moni-
tor on/off

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5-4. Using the driving support systems
■Vehicles that can be detected by the Blind Spot Monitor
The Blind Spot Monitor uses rear side radar sensors to detect t he following
vehicles traveling in adjacent lanes and advises the driver of the presence
of such vehicles via the indicators on the outside rear view mi rrors.
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)
■The Blind Spot Monitor detection areas
The areas that vehicles can be detected in are outlined below.
The range of each detection area is:
Approximately 0.5 m (1.6 ft.) to 3.5 m (11.5 ft.) from either s ide of the
vehicle*1
Approximately 1 m (3.3 ft.) forward of the rear bumper
Approximately 3 m (9.8 ft.) from the rear bumper
Blind Spot Monitor operation