2224-5. Using the driving support systems
Constant speed cruising:
When there are no vehicles ahead
The vehicle drives at the speed set by the driver.
If the set vehicle speed is exceeded while driving down a hill, the set vehicle
speed display will blin k and a buzzer will sound.
Deceleration and follow-up cruising:
When a preceding vehicle driving slower than the set vehicle
speed is detected
When a vehicle is detected driving ahead of your vehicle, the v ehicle auto-
matically decelerates and if a greater reduction in vehicle spe ed is neces-
sary, the brakes are applied (the stop lights will come on at t his time). The
vehicle is controlled to maintai n the vehicle-to-vehicle distance set by the
driver, in accordance with changes in the speed of the precedin g vehicle. If
vehicle deceleration is not sufficient and the vehicle approaches the vehicle
ahead, the approach wa rning will sound.
Acceleration:
When there are no longer any preceding vehicles driving slower
than the set vehicle speed
The vehicle accelerates until th e set vehicle speed is reached and then
resumes constant speed cruising.
Starting off:
If a preceding vehicle stops, the vehicle will also stop (contr olled
stop). After the preceding vehicle starts off, pressing the “RES”
switch or depressing the accelerator pedal will resume follow-u p
cruising (start off operation). If a start off operation is not per-
Basic functions
2264-5. Using the driving support systems
vehicle speed. However, while in
vehicle-to-vehicle distance control
mode, the vehicle speed may
decrease to below the set vehicle
speed in order to maintain the dis-
tance from the preceding vehicle.
■When the vehicle is stopped by
system control during follow-up
cruising
●When the “+RES” switch is
pressed while the vehicle is
stopped by system control, if the
preceding vehicle starts off within
approximately 3 seconds, fol-
low-up cruising will resume.
●If the preceding vehicle starts off
within approximately 3 seconds of
the vehicle being stopped by sys-
tem control, follo w-up cruising will
resume.
■Automatic cancellation of vehi-
cle-to-vehicle d istance control
mode
In the following situations, vehi-
cle-to-vehicle dista nce control mode
will be canceled automatically:
●When the brake control or output
restriction control of a driving sup-
port system operates
(For example: Pre-Collision Sys-
tem, drive-start control)
●When the parking brake has been
operated
●When the vehicle is stopped by
system control on a steep incline
●When any of the following are
detected while the vehicle is
stopped by system control:
• The driver’s seat belt is unfas- tened
• The driver’s door is opened
• Approximately 3 minutes have elapsed since the vehicle was
stopped
The parking brake may be actived
automatically.
●Situations in whic h some or all of
the functions of the system cannot
operate: P. 1 9 7
■Dynamic radar cruise control
system warning messages and
buzzers
For safe use: P. 1 9 2
■Preceding vehicles that the sen-
sor may not detect correctly
In the following situations, depend-
ing on the conditions, if the system
cannot provide sufficient decelera-
tion or acceleration is necessary,
operate the brake pedal or accelera-
tor pedal.
As the sensor may not be able to
correctly detect th ese types of vehi-
cles, the approach warning
( P.226) 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 driv-
ing 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 cor-
rectly
In the following situations, operate
the brake pedal (or accelerator
pedal, depending on the situation)
as necessary.
As the sensor may not be able to
correctly detect a vehicle, the sys-
tem may not operate properly.
●When a preceding vehicle brakes
suddenly
●When changing lanes at low
speeds, such as in a traffic jam
In situations where the vehicle
approaches a preceding vehicle
Approach warning
2384-5. Using the driving support systems
■When the brake hold sys-
tem 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 con-
tinue to apply the brakes,
unless the operation condi-
tions of the brake hold system
are no longer met. ( P.175)
■When the dynamic radar
cruise control with
full-speed range is operat-
ing
When the vehicle is stopped
by the dynamic radar cruise
control with full-speed range,
the engine will stop automati-
cally even though the brake
pedal is not depressed.
When the preceding vehicle
starts off, the engine will
restart automatically.
If the engine is restarted by
the Stop & Start system while
the vehicle is stopped by the
dynamic radar cruise control
with full-speed range, the vehicle will remain stopped.
Press the Stop & Start cancel
switch to disable the Stop &
Start system.
The Stop & Start cancel indicator
will illuminate.
Pressing the s witch again will
enable the Stop & Start system and
the Stop & Start cancel indicator will
turn off.
■Automatic enabling of the Stop
& Start system
If the Stop & Start system is dis-
abled using the Stop & Start cancel
switch, it will be a utomatically
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 tempo-
rarily maintained to prevent the
vehicle from rolling backwards
before the engine is restarted
Disabling the Stop & Start
system
Hill-start assist control
2614-5. Using the driving support systems
4
Driving
If a sensor is dirty, the position of the
dirty sensor will be shown on the
display.
Also, due to ice forming on a sensor
at low temperatures, a warning
message may be displayed or the
sensor may not be able to detect an
object. Once the ice melts, the sys-
tem will return to normal.
If a warning message is displayed
even if the sensor is clean, there
may be a sensor malfunction. Have
the vehicle inspected by your Toyota
dealer.
■Sensor detection information
●The sensors may be able to only
detect objects near the front and
rear bumpers.
●The following situations may occur
during use.
• Depending on the shape of the
object and other factors, the
detection distance may shorten, or
detection may be impossible.
• Detection may be impossible if static objects draw too close to the
sensor.
• After the static object detection, there will be a short delay before a
graphic is shown on displays, and
warning buzzer sounds. Even at
low speeds, there is a possibility
that the object will come within the
sensor’s detecti on areas before
the display is shown and the warn-
ing beep sounds.
• It might be difficult to hear the buzzer due to the volume of the
audio system or air flow noise of
the air conditioning system.
• It may be difficult to hear the buzzer if buzzers for other sys-
tems are sounding.
■Objects which the system may
not be properly detected
The shape of the object may pre-
vent the sensor from detecting it.
Pay particular attention to the follow-
ing objects:
●Wires, fences, ropes, etc.
●Cotton, snow and other materials
that absorb sound waves
●Sharply-angled objects
●Low objects
●Tall objects with upper sections
projecting outwards in the direc-
tion of your vehicle
●People may not be detected if
they are wearing certain types of
clothing.
■Situations in which the system
may not operate properly
Certain vehicle conditions and the
surrounding environment may affect
the ability of a sensor to correctly
detect objects. Part icular instances
where this may occur are listed
below.
●There is dirt, snow, water drops or
ice on a sensor. (Cleaning the
sensors will resolve this problem.)
●A sensor is froz en. (Thawing the
area will resolve this problem.)
In especially cold weather, if a
sensor is frozen the sensor dis-
play may be displayed abnormally,
or objects, such as a wall, may not
be detected.
●When a sensor or the area around
a sensor is extremely hot or cold.
●On an extremely bumpy road, on
an incline, on gravel, or on grass.
●When vehicle horns, vehicle
detectors, motorcycle engines, air
brakes of large vehicles, the clear-
ance sonar of ot her vehicles or
other devices which produce ultra-
sonic waves are near the vehicle
●A sensor is coated with a sheet of
spray or heavy rain.
2624-5. Using the driving support systems
●If objects draw too close to the
sensor.
●When a pedestrian is wearing
clothing that does not reflect ultra-
sonic waves (ex. skirts with gath-
ers or frills).
●When objects that are not perpen-
dicular to the ground, not perpen-
dicular to the v ehicle traveling
direction, uneven, or waving are in
the detection range.
●Strong wind is blowing
●When driving in inclement weather
such as fog, snow or a sandstorm
●When an object that cannot be
detected is betw een the vehicle
and a detected object
●If an object such as a vehicle,
motorcycle, bicycle or pedestrian
cuts in front of the vehicle or runs
out from the side of the vehicle
●If the orientation of a sensor has
been changed due t o a collision or
other impact
●When equipment that may
obstruct a sensor is installed, such
as a towing eyelet, bumper pro-
tector (an additi onal trim strip,
etc.), bicycle carrier, or snow plow
●If the front of the vehicle is raised
or lowered due to the carried load
●If the vehicle cannot be driven in a
stable manner, such as when the
vehicle has been in an accident or
is malfunctioning
●When a tire chains or compact
spare tire is used
■Situations in which the system
may operate even if there is no
possibility of a collision
In some situations, such as the fol-
lowing, the system may operate
even though there is no possibility of
a collision.
●When driving on a narrow road
●When driving towa rd a banner,
flag, low-hanging branch or boom
barrier (such as those used at rail-
road crossings, toll gates and
parking lots)
●When there is a ru t or hole in the
surface of the road
●When driving on a metal cover
(grating), such as those used for
drainage ditches
●When driving up or down a steep
slope
●If a sensor is hit by a large amount
of water, such as when driving on
a flooded road
●There is dirt, snow, water drops or
ice on a sensor. (Cleaning the
sensors will resolve this problem.)
●A sensor is coated with a sheet of
spray or heavy rain
●When driving in inclement weather
such as fog, snow or a sandstorm
●When strong winds are blowing
●When vehicle horns, vehicle
detectors, motorcycle engines, air
brakes of large vehicles, the clear-
ance sonar of ot her vehicles or
other devices which produce ultra-
sonic waves are near the vehicle
●If the front of the v ehicle is raised
or lowered due to the carried load
2654-5. Using the driving support systems
4
Driving
*: If equipped
The system can detect the fol-
lowing as detectable objects.
(Detectable objects differ
depending on the function.)
Static Objects Front and Rear
of the vehicle ( P.270)
Moving Vehicles Rear of the
Vehicle ( P.272)
PKSB (Parking Sup-
por t Brake)*
The PKSB (Parking Support
Brake) consists of the fol-
lowing functions that oper-
ate when driving at a low
speed or backing up, such
as when parking. When the
system determines that the
possibility of a collision
with a detected object is
high, a warning operates to
urge the driver to take eva-
sive action. If the system
determines that the possi-
bility of a collision with a
detected object is extremely
high, the brakes are auto-
matically applied to help
avoid the collision or help
reduce the impact of the col-
lision.
PKSB (Parking Support
Brake) system
WARNING
■Cautions regarding the use of
the system
Do not overly rely on the system,
as doing so may lead to an acci-
dent.
Always drive while checking the
safety of the surroundings of the
vehicle.
Depending on the vehicle and
road conditions, weather, etc., the
system may n ot operate.
The detection cap abilities of sen-
sors and radars are limited.
Always drive while checking the
safety of the surroundings of the
vehicle.
●The driver is solely responsible
for safe driving. Always drive
carefully, taking care to observe
your surroundings. The PKSB
(Parking Support Brake) system
is designed to provide support
to lessen the severity of colli-
sions. However, it may not oper-
ate in some situations.
●The PKSB (Parki ng Support
Brake) system is not designed
to stop the vehicle completely.
Additionally, even if the system
has stopped the vehicle, it is
necessary to depress the brake
pedal immediately as brake
control will be canceled after
approximately 2 seconds.
●It is extremely dangerous to
check the system operations by
intentionally driving the vehicle
into the direction of a wall, etc.
Never attempt such actions.
2674-5. Using the driving support systems
4
Driving
mation display, to alert the driver.
Depending on the situation, engine
output restriction control will oper-
ate to either limit acceleration or
restrict output as much as possible.
Engine output restriction con-
trol is operating (acceleration
restriction)
Acceleration greater than a certain
amount is restricted by the system.
Multi-information display: “Object
Detected Acceleration Reduced”
Driving assist information indicator:
Not illuminated
Buzzer: Does not sound
Engine output restriction con-
trol is operating (output
restricted as much as possi-
ble)
The system has determined that
stronger-than-normal brake opera-
tion is necessary. Multi-information
display: “BRAKE!”
Driving assist information indicator:
Not illuminated
Buzzer: Short beep
Brake control is operating
The system determined that emer-
gency braking is necessary.
Multi-information display: “BRAKE!”
Driving assist information indicator:
Not illuminated
Buzzer: Short beep
Vehicle stopped by system
operation
The vehicle has been stopped by
brake control operation.
Multi-information di splay: “Switch to
Brake” (If the acce lerator pedal is
not depressed, “Press Brake Pedal”
will be displayed.)
Driving assist information indicator:
Illuminated
Buzzer: Sounds repeatedly
If the PKSB (Parking Support Brake) determines that a collision with
a detected object is possible, the engine output will be restri cted to
restrain any increase in the vehicle speed. (Engine output restriction
control: See figure 2.)
Additionally, if the accelerator pedal continues to be depresse d, the
brakes will be applied automatica lly to reduce the vehicle speed.
(Brake control: See figure 3.)
Figure 1 When the PKSB (Parking Support Brake) is not operating
System overview
2744-5. Using the driving support systems
■ABS (Anti-lock Brake Sys-
tem)
Helps to prevent wheel lock
when the brakes are applied
suddenly, or if the brakes are
applied while driving on a slip-
pery road surface
■Brake assist
Generates an increased level of
braking force after the brake
pedal is depressed when the
system detects a panic stop sit-
uation
■VSC (Vehicle Stability Con-
trol)
Helps the driver to control skid-
ding when swerving suddenly or
turning on slippery road sur-
faces.
■Enhanced VSC (Enhanced
Vehicle Stability Control)
Provides cooperative control of
the ABS, TRAC, VSC and EPS.
Helps to maintain directional
stability when swerving on slip-
pery road surfaces by con-
trolling steering performance.
■TRAC (Traction Control)
Helps to maintain drive power
and prevent the drive wheels
from spinning when starting the
vehicle or accelerating on slip-
pery roads
■Active Cornering Assist
(ACA)
Helps to prevent the vehicle
from drifting to the outer side by
performing inner wheel brake
control when attempting to
accelerate while turning
■Hill-start assist control
Helps to reduce the backward
movement of the vehicle when
starting on an uphill
■EPS (Electric Power Steer-
ing)
Employs an electric motor to
reduce the amount of effort
needed to turn the steering
wheel.
■Dynamic Torque Control
AWD system (AWD models)
Automatically controls the drive
system such as to front-wheel
drive or AWD (all wheel drive)
according to various running
Driving assist systems
To keep driving safety and
performance, the following
systems operate automati-
cally in response to various
driving situations. Be
aware, however, that these
systems are supplementary
and should not be relied
upon too heavily when oper-
ating the vehicle.
Summary of the driving
assist systems