2021 TOYOTA RAV4 brake sensor

2774-5. Using the driving support systems
4
Driving
■If “Parking Assist Unavailable”
is displayed on the multi-infor-
mation display
●Water may be continuously flow-
ing over the sensor surface, such
as in a heavy rain. When the sys-
tem determines that it is normal,
the system will re turn to normal.
●Initialization may not have been
performed after a battery terminal
was disconnected and recon-
nected. Initialize the system.
(  P.277)
If this message continues to be
displayed even after initialization,
have the vehicle inspected by
your Toyota dealer.
■If a battery terminal has been
disconnected and reconnected
The system needs to be initialized.
To initialize the system, drive the
vehicle straight ahead for 5 seconds
or more at a speed of approximately
22 mph (35 km/h) or more.
■Sensor detection information
●The sensor’s detection areas are
limited to the areas around the
vehicle’s 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.
• There will be a short delay
between static object detection
and display (warning buzzer
sounds). Even at low speeds,
there is a possibilit y that the object
will come within 11. 9 in. (30 cm)
before the display is shown and
the warning buzzer 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
sound of this system due to the buzzers of other systems.
■Conditions under which the
function may not function cor-
rectly
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 or ice on a sen-
sor. (Cleaning th e 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 abnor-
mally, or objects, such as a wall,
may not be detected.
●A sensor is cove red in any way.
●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.
●The vicinity of the vehicle is noisy
due to vehicle horns, motorcycle
engines, air brakes of large vehi-
cles, or other lou d noises produc-
ing ultrasonic waves.
●There is another vehicle equipped
with parking assist sensors in the
vicinity.
●A sensor is coated with a sheet of
spray or heavy rain.
●If a sensor is hit by a large amount
of water, such as when driving on
a flooded road.
●If the vehicle is significantly tilted.
●The vehicle is approaching a tall
or curved curb.
●If objects draw too close to the
sensor.
■Objects which may not be prop-
erly detected
The shape of the object may pre-
vent the sensor from detecting it.

2824-5. Using the driving support systems
The Parking Support Brake can
be enabled/disabled on the
screen of the multi-information
display. All of the Parking Sup-
port Brake functions (static
objects and rear-crossing vehi-
cles) are enabled/disabled
simultaneously. (P.94)
When the Parking Support Brake is
disabled, the PKSB OFF indicator
( P.79) illuminates on the multi-
information display.
To re-enable the system, select
on the multi-inform ation display,
select and turn it on.
If the system is disabled, it will
remain off even if t he engine switch
is turned to ON after the engine
switch has been turned off.
If the engine output restriction
control or brake control oper-
ates, a buzzer will sound and a
message will be displayed on
the multi-information display,
navigation system (if equipped)
or multimedia system (if
equipped) screen, 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 restric ted by the system.
Navigation system (if equipped) or
multimedia system (if equipped)
screen: No warning displayed
Multi-information display: “Object
Detected Acceleration Reduced”
PKSB OFF indicator: Not illumi-
nated
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.
Navigation system (if equipped) or
multimedia system (if equipped)
NOTICE
■If “Parking Support Brake
Unavailable” is displayed on
the multi-information display
and the PKSB OFF indicator
is flashing
If this message is displayed
immediately after the engine
switch is changed to ON, operate
the vehicle carefully, paying atten-
tion to your surroundings. It may
be necessary to drive the vehicle
for a certain amount of time
before the system returns to nor-
mal. (If the system does not return
to normal after dr iving for a while,
clean the sensors and their sur-
rounding area on the bumpers.)
Enabling/Disabling the
Parking Support Brake
Display and buzzer for
engine output restriction
control and brake control

2844-5. Using the driving support systems
trol begins operating (System
determines that possibility of
collision with detected object
is high)
 Figure 3: When engine out-
put restriction control and
brake control operates
Engine output
Braking force
Time
Engine output restriction con-
trol begins operating (System
determines that possibility of
collision with detected object
is high)
Brake control begins operat-
ing (System determines that
possibility of collision with
detected object is extremely
high)
■If the Parking Support Brake
has operated
If the vehicle is stopped due to oper-
ation of the Parki ng Support Brake,
the Parking Suppor t Brake will be
disabled and the PKSB OFF indica-
tor will illuminate. If the Parking Sup-
port Brake operates unnecessarily,
brake control can be canceled by
depressing the brake pedal or wait- ing for approximate
ly 2 seconds for
it to automatically be canceled.
Then, the vehicle can be operated
by depressing the accelerator pedal.
■Re-enabling the Parking Sup-
port Brake
To re-enable the Parking Support
Brake when it is disabled due to
operation of the Parking Support
Brake, either enable the system
again ( P.282), or turn the engine
switch to OFF and then back to ON.
Additionally, if the object becomes
no longer in the traveling direction of
the vehicle or if the traveling direc-
tion of the vehicle changes (such as
changing from moving forward to
backing up, or from backing up to
moving forward), t he system will be
re-enabled automatically.
■If “Parking Support Brake
Unavailable” is displayed on
the multi-information display
and the PKSB OFF indicator is
flashing
●If this message i s displayed, a
sensor on the front or rear bumper
may be dirty. Clean the sensors
and their surrounding area on the
bumpers.
●Initialization may not have been
performed after a battery terminal
was disconnected and recon-
nected. Initialize the system.
(  P.285)
If this message continues to be
displayed even afte r initialization,
have the vehicle inspected by
your Toyota dealer.
■If “Parking Support Brake
Unavailable” and “Parking
Assist Unavailab le Clean Park-
ing Assist Sensor” are dis-
played on the multi-information
display and the PKSB OFF indi-
cator is flashing
●A sensor may be covered with ice,
snow, dirt, etc. In this case,
remove the ice, snow, dirt, etc.,
from the sensor t o return the sys-
tem to normal. If this message is
A
B
C
D
E

2864-5. Using the driving support systems
*: If equipped
This function will operate in situations such as the following if an
object is detected in the traveling direction of the vehicle.
■When traveling at a low speed and the brake pedal is not
depressed, or is depressed late
Parking Support Brake fu nction (static objects)*
If the sensors detect a static object, such as a wall, in the t rav-
eling direction of the vehicle and the system determines that a
collision may occur due to the vehicle suddenly moving for-
ward due to an accidental accelerator pedal operation, the
vehicle moving the unintended direction due to the wrong
shift position being selected, or while parking or traveling at
low speeds, the system will operate to lessen the impact with
the detected static object and reduce the resulting damage.
Examples of function operation

2874-5. Using the driving support systems
4
Driving
■When the accelerator pedal is depressed excessively
■When the vehicle moves in the unintended direction due to
the wrong shift position being selected
 P.273
Types of sensorsWARNING
■To ensure the Parking Sup-
port Brake can operate prop-
erly
Observe the following precautions
regarding the sensors ( P.273).
Failure to do so may cause a sen-
sor to not operate properly, and
may cause an accident.
●Do not modify, d isassemble or
paint the sensors.

2884-5. Using the driving support systems
WARNING
●Do not replace a sensor with a
part other than a genuine part.
●Do not subject a sensor or its
surrounding area to a strong
impact.
●Do not damage the sensors,
and always keep them clean.
●If the area around a radar sen-
sor is subjected to an impact,
the system may not operate
properly due to a sensor mal-
function. Have the vehicle
inspected by your Toyota
dealer.
■Handling the suspension
Do not modify the suspension, as
changes to the height or inclina-
tion of the vehicle may prevent
the sensors from detecting
objects correctly or cause the sys-
tem to not operate or operate
unnecessarily.
■If the Parking Support Brake
function (static objects) oper-
ates unnecessarily, such as
at a railroad crossing
In the event that the Parking Sup-
port Brake function (static objects)
operates unnecessarily, such as
at a railroad cross ing, brake con-
trol will be cancele d after approxi-
mately 2 seconds, allowing you to
proceed forward and leave the
area, brake control can also be
canceled by depressing the brake
pedal. Depressing the accelera-
tor pedal after brake control is
canceled will allow you to proceed
forward and leave the area.
■Notes when washing the vehi-
cle
Do not apply intensive bursts of
water or steam to the sensor
area.
Doing so may result in the sensor
malfunctioning.
●When using a high pressure
washer to wash the vehicle, do
not spray the sensors directly,
as doing so may cause a sensor
to malfunction.
●When using steam to clean the
vehicle, do not direct steam too
close to the sensors as doing so
may cause a sensor to malfunc-
tion.
■When to disable the Parking
Support Brake
In the following situations, disable
the Parking Suppor t Brake as the
system may opera te even though
there is no possibility of a colli-
sion.
●When inspecting the vehicle
using a chassis roller, chassis
dynamo or free roller
●When loading the vehicle onto a
boat, truck or other transport
vessel
●If the suspension has been
modified or tires of a size other
than specified are installed
●If the front of the vehicle is
raised or lowered due to the
carried load
●When equipment that may
obstruct a sensor is installed,
such as a towing eyelet, bumper
protector (an additional trim
strip, etc.), bicycle carrier, or
snow plow
●When using an automatic car
wash

2894-5. Using the driving support systems
4
Driving
■The Parking Support Brake
function (static object) will
operate when
The function will op erate when the
PKSB OFF indicato r is not illumi-
nated or flashing ( P.77, 79) and
all of the followin g conditions are
met:
●Engine output restriction control
• The Parking Support Brake is enabled.
• The vehicle speed is 9 mph (15 km/h) or less.
• There is a static object in the trav-
eling direction of the vehicle and 6
to 13 ft. (2 to 4 m) away.
• The Parking Support Brake deter-
mines that a stronger-than-nor-
mal brake operation is necessary
to avoid a collision.
●Brake control
• Engine output restri ction control is
operating
• The Parking Support Brake deter- mines that an immediate brake
operation is necessary to avoid a
collision.
■The Parking Support Brake
function (static objects) will
stop operating when
The function will st op operating if
any of the following conditions are
met:
●Engine output restriction control
• The Parking Support Brake is dis- abled.
• The system determines that the collision has beco me avoidable
with normal brake operation.
• The static object is no longer 6 to 13 ft. (2 to 4 m) away from the
vehicle or in the traveling direction
of the vehicle.
●Brake control
• The Parking Support Brake is dis- abled.
• Approximately 2 seconds have
elapsed since the vehicle was
stopped by brake control.
• The brake pedal is depressed after the vehicle is stopped by
brake control.
• The static object is no longer 6 to 13 ft. (2 to 4 m) away from the
vehicle or in the traveling direction
of the vehicle.
■Detection range of the Parking
Support Brake function (static
objects)
The detection range of the Parking
Support Brake function (static
objects) differs from the detection
range of the intuiti ve parking assist.
(  P.278) Therefore, even if the
intuitive parking assist detects an
object and provides a warning, the
Parking Support Brake function
(static objects) may not start operat-
ing.
■Objects that the Parking Sup-
port Brake function (static
objects) may not detect
The sensors may not be able to
detect certain objects, such as the
following:
●Pedestrian
●Cotton, snow, and other materials
that are poor re flectors of sonic
waves
●Objects which are not perpendicu-
lar to the ground, are not perpen-
dicular to the traveling direction of
the vehicle, are uneven or are
waving
●Low objects
●Thin objects such as wires,
fences, ropes and signposts
●Objects that are e xtremely close
to the bumper
●Sharply-angled objects
●Tall objects with upper sections
projecting outwards in the direc-
tion of your vehicle
■Situations in wh ich the Parking
Support Brake function (static
objects) may not operate
When the shift lever is in N

2904-5. Using the driving support systems
■Intuitive parking assist buzzer
Regardless of whether the intuitive
parking assist syste m is enabled or
not ( P.275), if the Parking Support
Brake function (static objects) is
enabled ( P.282), the front or rear
sensors detect an object and brake
control and engine output restric-
tion control are performed, the intui-
tive parking assist buzzer will sound
to notify the driv er of the approxi-
mate distance to the object.
■Situations in which the Parking
Support Brake function (static
objects) may op erate even if
there is no possibility of a colli-
sion
In some situations, such as the fol-
lowing, the Parking Support Brake
function (static objects) may operate
even though there is no possibility of
a collision.
●Vehicle surroundings
• When driving on a narrow road
• When driving on a gravel road or in an area with tall grass
• When driving toward 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 structure on the roadside (such as when driving in a narrow tunnel
, on a narrow
bridge or on a narrow road)
• When parallel parking
• When there is a rut 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
• When loaded on ships or trucks
• Moving type automatic car wash
• Lift type parking area or multi- story parking lot
• Underground parking area
• Structures on the ground (speed bumps, cat’s eyes, etc.)
• Differences in height
• When moving straight ahead or turning right
• Snow-melting pipes
• Devices for detecting vehicles, such as traffic lig hts, devices for
detecting traffic congestion, or
devices for detecting empty
spaces in parking areas
• Railroad tracks
• H-shaped steel
• When there are vehicles on both sides, or there is a vehicle that
resembles this vehicle
●Weather
• If a sensor is covered with ice, snow, dirt, etc. (when cleared, the
system will return to normal)
• If heavy rain or water strikes a sensor
• When driving in inclement weather such as fog, snow or a sandstorm
• Strong wind is blowing
●Other sonic wave sources
• 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 a sticker or an electronic compo-
nent, such as a backlit license
plate (especially fluorescent type),