sensor TOYOTA RAV4 2021 (in English) Owner's Manual

2274-5. Using the driving support systems
4
Driving
WARNING
■To avoid malfunction of the
radar sensor
Observe the following precau-
tions.
Otherwise, the radar sensor may
not operate properly, possibly
leading to an accident resulting in
death or serious injury.
●Keep the radar sensor and the
radar sensor cover clean at all
times.
Radar sensor
Radar sensor cover
If the front of the r adar sensor or
the front or back of the radar sen-
sor cover is dirty or covered with
water droplets, snow, etc., clean
it.
Clean the radar sensor and radar
sensor cover with a soft cloth to
avoid damaging them.
●Do not attach accessories,
stickers (including transparent
stickers) or oth er items to the
radar sensor, radar sensor
cover or surrounding area.
●Do not subject the radar sensor
or its surrounding area to a
strong impact.
If the radar sen sor, front grille,
or front bumper has been sub-
jected to a strong impact, have
the vehicle insp ected by your
Toyota dealer.
A
B
●Do not disassemble the radar
sensor.
●Do not modify or paint the radar
sensor or radar sensor cover.
●In the following cases, the radar
sensor must be recalibrated.
Contact your Toyota dealer for
details.
• When the radar s ensor or front
grille are removed and installed,
or replaced
• When the front bumper is replaced
■To avoid malfunction of the
front camera
Observe the following precau-
tions.
Otherwise, the f ront camera may
not operate properly, possibly
leading to an accident resulting in
death or serious injury.
●Keep the windshield clean at all
times.
• If the windshield is dirty or cov-
ered with an o ily film, water
droplets, snow, etc., clean the
windshield.
• If a glass coating agent is applied to the windshield, it will
still be necessary to use the
windshield wipers to remove
water droplets, etc. from the
area of the windshield in front of
the front camera.
• If the inner side of the wind- shield where the front camera is
installed is dirty, contact your
Toyota dealer.

2304-5. Using the driving support systems
■If a warning message is displayed on the multi-information display
A system may be temporarily unava ilable or there may be a malfunction in
the system.
●In the following situations, perform the actions specified in t he table. When
the normal operating conditions are detected, the message will disappear
and the system will be come operational.
If the message does not disapp ear, contact your Toyota dealer.
SituationActions
When the area around a sensor is
covered with dirt, moisture (fogged
up, covered with condensation, ice,
etc.), or other foreign matterTo clean the part of the windshield in
front of the front c amera, use the
windshield wipers or the windshield
defogger of the air conditioning sys-
tem ( P.517, 524).

2314-5. Using the driving support systems
4
Driving
●In the following situations, if the situation has changed (or the vehicle has
been driven for some time) and the normal operating conditions are
detected, the message will disappear and the system will become opera-
tional.
If the message does not disapp ear, contact your Toyota dealer.
• When the temperature around the radar sensor is outside of the opera-
tional range, such as when the vehicle is in the sun or in an e xtremely cold
environment
• When the front camera cannot d etect objects in front of the vehicle, such
as when driving in the dark, sno w, or fog, or when bright lights are shining
into the front camera
When the temperature around the
front camera is outside of the opera-
tional range, such as when the vehi-
cle is in the sun or in an extremely
cold environment
If the front camera is hot, such as
after the vehicle had been parked in
the sun, use the air conditioning sys-
tem to decrease the temperature
around the front camera.
If a sunshade was used when the
vehicle was parked, depending on its
type, the sunlight reflected from the
surface of the sunshade may cause
the temperature of the front camera
to become excessively high.
If the front camera is cold, such as
after the vehicle is parked in an
extremely cold environment, use the
air conditioning system to increase
the temperature around the front
camera.
The area in front o f the front camera
is obstructed, such as when the
hood is open or a sticker is attached
to the part of the win dshield in front
of the front camera.
Close the hood, rem ove the sticker,
etc. to clear the obstruction.
SituationActions

2324-5. Using the driving support systems
The system can detect the fol-
lowing:
Vehicles
 Bicyclists
 Pedestrians
■Pre-collision warning
When the system determines
that the possibility of a frontal
collision is high, a buzzer will
sound and a warning message
will be displayed on the multi-
information display to urge the
driver to take evasive action.
■Pre-collision brake assist
When the system determines
that the possibility of a frontal
collision is high, the system
applies greater braking force in
relation to how strongly the
brake pedal is depressed.
■Pre-collision braking
If the system determines that
the possibility of a frontal colli-
sion is extremely high, the
brakes are automatically applied
to help avoid the collision or
reduce the impact of the colli-
sion.
PCS (Pre-Collision Sys-
tem)
The pre-collision system
uses a radar sensor and
front camera to detect
objects ( P.232) in front of
the vehicle. When the sys-
tem determines that the
possibility of a frontal colli-
sion with an object is high,
a warning operates to urge
the driver to take evasive
action and the potential
brake pressure is increased
to help the driver avoid the
collision. If the system
determines that the possi-
bility of a frontal collision
with an object is extremely
high, the brakes are auto-
matically applied to help
avoid the collision or help
reduce the impact of the
collision.
The pre-collision system can
be disabled/enabled and the
warning timing can be
changed. ( P.234)
Detectable objects
System functions

2374-5. Using the driving support systems
4
Driving
the entrance of a curve
• When there are patterns or paint in front of your vehicle that may be
mistaken for a detectable object
• When the front of your vehicle is hit by water, snow, dust, etc.
• When overtaking a detectable object that is ch anging lanes or
making a right/left turn
• When passing a detectable object in an oncoming lane that is
stopped to make a right/left turn
• When a detectable object approaches very close and then
stops before entering the path of
your vehicle
• If the front of your vehicle is raised
or lowered, such as when on an
uneven or undulating road surface
• When driving on a road sur-
rounded by a structure, such as in
a tunnel or on an iron bridge
• When there is a metal object
(manhole cover, steel plate, etc.),
steps, or a protrusion in front of your vehicle
• When passing under an object (road sign, billboard, etc.)
• When approaching an electric toll gate barrier, parking area barrier,
or other barrier that opens and
closes
• When using an automatic car wash
• When driving through or under objects that may contact your
vehicle, such as thick grass, tree
branches, or a banner
• When driving through steam or smoke
• When driving near an object that reflects radio waves, such as a
large truck or guardrail
• When driving near a TV tower, broadcasting station, electric
power plant, or other location
where strong radio waves or elec-
trical noise may be present
■Situations in which the system
may not operate properly
●In some situations such as the fol-
lowing, an object may not be
detected by the radar sensor and
front camera, pre venting the sys-
tem from opera ting properly:
• When a detectable object is approaching your vehicle
• When your vehicle or a detectable
object is wobbling

2394-5. Using the driving support systems
4
Driving
such as heavy rain, fog, snow or a
sandstorm
• When driving through steam or smoke
• When the surrounding area is dim, such as at dawn or dusk, or while
at night or in a t unnel, making a
detectable object appear to be
nearly the same color as its sur-
roundings
• When driving in a place where the surrounding brightness changes
suddenly, such as at the entrance
or exit of a tunnel
• After the engine has started the vehicle has not been driven for a
certain amount of time
• While making a left/right turn and for a few seconds after making a
left/right turn
• While driving on a curve and for a
few seconds after driving on a
curve
• If your vehicle is skidding
• If the front of the vehicle is raised or lowered
• If the wheels are misaligned
• If a wiper blade is blocking the front camera
• The vehicle is being driven at extremely high speeds
• When driving on a hill
• If the radar sensor or front camera is misaligned
●In some situations such as the fol-
lowing, sufficien t braking force
may not be obtained, preventing
the system from performing prop-
erly:
• If the braking functions cannot operate to their full extent, such as
when the brake parts are
extremely cold, extremely hot, or
wet • If the vehicle is not properly main-
tained (brakes or tires are exces-
sively worn, imprope r tire inflation
pressure, etc.)
• When the vehicle is being driven on a gravel road or other slippery
surface
■If VSC is disabled
●If VSC is disabled ( P.366), the
pre-collision brak e assist and pre-
collision braking functions are also
disabled.
●The PCS warning light will turn on
and “VSC Turned Off Pre-Colli-
sion Brake System Unavailable”
will be displayed on the multi-
information display.

2504-5. Using the driving support systems
due to a malfunction in a sensor
other than the front camera. Turn
the LTA system off, wait for a little
while, and then turn the LTA system
back on.
●“LTA Unavailable at Current
Speed”
The function cannot be used as the
vehicle speed exceeds the LTA
operation range. Drive slower.
■Customization
Function settings can be changed.
(  P.94)
*: If equipped
RSA (Road Sign
Assist)*
The RSA system recognizes
specific road signs using
the front camera to provide
information to the driver via
the display.
If the system judges that the
vehicle is being driven over
the speed limit, performing
prohibited actions, etc.
according to the recog-
nized road signs, it notifies
the driver through a visual
notification and notification
buzzer.
WARNING
■Before using the RSA
Do not rely sole ly upon the RSA
system. RSA is a system which
supports the driver by providing
information, but it is not a replace-
ment for a driver’s own vision and
awareness. Drive safely by
always paying careful attention to
the traffic rules.

2524-5. Using the driving support systems
nizes a do not enter sign and
determines that your vehicle
has entered a no-entry area,
the displayed sign will flash
and a buzzer will sound.
Depending on the situation, a
notification function may not
operate properly.
■Setting procedure
 P.94
■Automatic turn-off of RSA sign
display
In the following situations, displayed
speed limit sign and/or do not enter
signs will stop being displayed auto-
matically:
●No sign has been recognized for a
certain distance.
●The road changes due to a left or
right turn, etc.
In the following si tuations, stop and
yield signs will stop being displayed
automatically:
●The system determines that your
vehicle has passed the sign.
●The road changes due to a left or
right turn, etc.
■Conditions in which the func-
tion may not operate or detect
correctly
In the following situations, RSA
does not operate normally and may
not recognize signs, display the
incorrect sign, etc. However, this
does not indicate a malfunction.
●The front camera is misaligned
due to a strong impact being
applied to the sensor, etc.
●D i r t , s n o w , s t i c k e r s , e t c . a r e o n t h e
windshield near the front camera.
●In inclement weather such as
heavy rain, fog, snow or sand
storms
●Light from an oncoming vehicle, the sun, etc. ente
rs the front cam-
era.
●The sign is dirty, faded, tilted or
bent, and if an electronic sign, the
contrast is poor.
●All or part of the sign is hidden by
the leaves of a tree, a pole, etc.
●The sign is only visible to the front
camera for a short amount of time.
●The driving scene (turning, lane
change, etc.) is judged incorrectly.
●If a sign not appropriate for the
currently traveled lane, but the
sign exists directly after a freeway
branches, or in an adjacent lane
just before merging.
●Stickers are attached to the rear
of the preceding vehicle.
●A sign resembling a system com-
patible sign is recognized.
●Side road speed signs may be
detected and displayed (if posi-
tioned in sight of the front camera)
while the vehicle i s traveling on
the main road.
●Roundabout exit road speed signs
may be detected and displayed (if
positioned in si ght of the front
camera) while t raveling on a
roundabout.
●The front of the vehicle is raised or
lowered due to the carried load.
●The surrounding brightness is not
sufficient or changes suddenly.
●When a sign inte nded for trucks,
etc. is recognized.
●The speed information displayed
on the meter and on the naviga-
tion system may be different due
to the navigation system using
map data.
■Speed limit sign display
If the engine switch was last turned
off while a speed limit sign was dis-
played on the multi-information dis-
play, the same sign displays again
when the engine switch is turned to
ON.

2544-5. Using the driving support systems
Indicators
■Operation switchesVehicle-to-vehicle distance
switch
“+RES” switch
Cruise control main switch
Cancel switch
“-SET” switch
WARNING
■Before using dynamic radar
cruise control with full-speed
range
●Driving safely is the sole
responsibility of t he driver. Do
not rely solely o n the system,
and drive safely by always pay-
ing careful attention to your sur-
roundings.
C
A
B
C
D
E
●The dynamic radar cruise con-
trol with full-speed range pro-
vides driving assistance to
reduce the driver’s burden.
However, there ar e limitations
to the assistance provided.
Read the following conditions
carefully. Do not overly rely on
this system and always drive
carefully.
• When the sensor may not be correctly detecting the vehicle
ahead: P.263
• Conditions under which the vehicle-to-vehicle distance con-
trol mode may not function cor-
rectly: P.263
●Set the speed appropriately
depending on the speed limit,
traffic flow, road conditions,
weather conditions, etc. The
driver is responsible for check-
ing the set speed.
●Even when the system is func-
tioning normally, the condition
of the preceding vehicle as
detected by the system may dif-
fer from the condition observed
by the driver. Therefore, the
driver must always remain alert,
assess the danger of each situ-
ation and drive safely. Relying
solely on this system or assum-
ing the system ensures safety
while driving can lead to an
accident, result ing in death or
serious injury.
●Switch the dynamic radar cruise
control with full-speed range
setting to off, using the cruise
control main switch when not in
use.

2564-5. Using the driving support systems
This mode employs a radar to detect the presence of vehicles up to
approximately 328 ft. (100 m) ahead, determines the current vehicle-
to-vehicle following distance, and operates to maintain a suitable fol-
lowing distance from the vehicle ahead. The desired vehicle-to- vehi-
cle distance can also be set by operating the vehicle-to-vehicl e
distance switch.
When driving on downhill slopes, t he vehicle-to-vehicle distance may
become shorter.
WARNING
●When weather conditions are
bad enough that they may pre-
vent the sensors from detecting
correctly (fog, snow, sandstorm,
heavy rain, etc.)
●When there is rain, snow, etc.
on the front surface of the radar
or front camera
●In traffic conditions that require
frequent repeated acceleration
and deceleration
●When your vehicle is towing a
trailer or during emergency tow-
ing
●When an approach warning
buzzer is heard often
Driving in vehicle-to-vehicle distance control mode