steering TOYOTA RAV4 PRIME 2021 (in English) Service Manual

2825-2. Driving procedures
●The message asking if you wish to
enable/disable the automatic
hybrid system shut off feature will
sometimes be displayed on the
multi-informat ion display.
Leaving the vehicle as is or select-
ing “Perform Auto Off” keeps the
automatic hybrid system shut off
feature enabled, and selecting
“Keep Vehicle On” disables the
automatic hybrid system shut off
feature.
●The timer for the automatic hybrid
system shut off feature will reset if
the brake pedal is depressed or if
the shift lever is in a position other
than P.
●After the vehicle is parked, if the
door is locked with the door lock
switch ( P.201) from the inside
or the mechanical key ( P.537)
from the outside, the automatic
hybrid system shut off fe ature will
be disabled. The timer for the
automatic hybrid system shut off
feature will be re-enabled if the
driver’s door is opened.
WARNING
■Stopping the hybrid system
in an emergency
●If you want to stop the hybrid
system in an emergency while
driving the vehicle, press and
hold the power s witch for more
than 2 seconds, or press it
briefly 3 times or more in suc-
cession. ( P.505)
However, do not touch the
power switch while driving
except in an emergency. Turn-
ing the hybrid s ystem off while
driving will not cause a loss of
steering or braking control.
However, power assist for the
steering wheel may be lost mak-
ing it difficult to steer smoothly
before stopping the vehicle
depending on the remaining
charge in the 12-volt battery or
usage conditions. In this situa-
tion, you should p ull over and
stop the vehicle as soon as it is
safe to do so.
●If the power switch is operated
while the vehicle is running, a
warning message will be shown
on the multi-information display
and a buzzer sounds.
●When restarting the hybrid sys-
tem after an emergency shut-
down, shift the shift lever to N
and press the power switch
shortly and firmly.

2975-3. Operating the lights and wipers
5
Driving
after several seconds to help
enhance the visibility of your vehi-
cle.
■12-volt battery-saving function
In order to prevent the 12-volt bat-
tery of the vehicle from discharging,
if the headlights and/or tail lights are
on when the power switch is turned
to OFF, the battery saving function
will operate and automatically turn
off all the lights after approximately
20 minutes.
When any of the fo llowing are per-
formed, the 12-volt battery-saving
function is canceled once and then
reactivated. All the lights will turn off
automatically 20 mi nutes after the
12-volt battery-saving function has
been reactivated:
●When the headlight switch is oper-
ated
●When a door is opened or closed
■If “Headlight System Malfunc-
tion Visit Your Dealer” is dis-
played on the multi-information
display
The system may be malfunctioning.
Have the vehicle inspected by your
Toyota dealer.
■Customization
Settings (e.g. light sensor sensitiv-
ity) can be changed.
(Customizable features: P.577)
1 With the headlights on, push
the lever away from you to
turn on the high beams.
Pull the lever toward you to the
center position to turn the high
beams off.
2Pull the lever toward you and
release it to flash the high
beams once.
You can flash the high beams with
the headlights on or off.
AFS (Adaptive Front-lighting
System) secures excellent visi-
bility at intersections and on
curves by automatically adjust-
ing the direction of the light axis
of the headlights according to
vehicle speed and the degree of
the tire’s angle as controlled by
steering input.
AFS operates at speeds of
approximately 6 mph (10 km/h)
or higher.
NOTICE
■To prevent 12-volt battery dis-
charge
Do not leave the lights on longer
than necessary when the hybrid
system is not operating.
Turning on the high beam
headlights
AFS (Adaptive Front-light-
ing System) (if equipped)

3165-5. Using the driving support systems
WARNING
■Limitations of the pre-colli-
sion system
●The driver is solely responsible
for safe driving. Always drive
safely, taking care to observe
your surroundings.
Do not use the pre-collision sys-
tem instead of normal braking
operations under any circum-
stances. This system will not
prevent collisions or lessen col-
lision damage or injury in every
situation. Do not overly rely on
this system. Failure to do so
may lead to an accident, result-
ing in death or serious injury.
●Although this system is
designed to help avoid a colli-
sion or help reduce the impact
of the collision, its effectiveness
may change according to vari-
ous conditions, therefore the
system may not always be able
to achieve the same level of
performance.
Read the following conditions
carefully. Do not overly rely on
this system and always drive
carefully.
• Conditions under which the sys- tem may operate even if there is
no possibility of a collision:
 P.319
• Conditions under which the sys- tem may not operate properly:
 P.320
●Do not attempt to test the oper-
ation of the pre-collision system
yourself.
Depending on the objects used
for testing (dummies, card-
board objects imitating detect-
able objects, etc.), the system
may not operate properly, pos-
sibly leading to an accident.
■Pre-collision braking
●When the pre-collision braking
function is operating, a large
amount of braking force will be
applied.
●If the vehicle is stopped by the
operation of the pre-collision
braking function, the pre-colli-
sion braking function operation
will be canceled after approxi-
mately 2 seconds. Depress the
brake pedal as necessary.
●The pre-collision braking func-
tion may not operate if certain
operations are performed by the
driver. If the accelerator pedal is
being depressed strongly or the
steering wheel is being turned,
the system may determine that
the driver is taking evasive
action and possibly prevent the
pre-collision braking function
from operating.
●In some situations, while the
pre-collision brak ing function is
operating, operation of the func-
tion may be canceled if the
accelerator pedal is depressed
strongly or the steering wheel is
turned and the system deter-
mines that the driver is taking
evasive action.
●If the brake pedal is being
depressed, the system may
determine that t he driver is tak-
ing evasive action and possibly
delay the operation timing of the
pre-collision braking function.
■When to disable the pre-colli-
sion system
In the following situations, disable
the system, as it may not operate
properly, possibly leading to an
accident resulting in death or seri-
ous injury:
●When the vehicle is being towed

3195-5. Using the driving support systems
5
Driving
●Pre-collision braking
The system may not operate in the following situations:
●If a 12-volt battery te rminal has been disc onnected and reconne cted and
then the vehicle has not been dr iven for a certain amount of time
●If the shift lever is in R
●When the VSC OFF indicator is illuminated (only the pre-collision warning
function will be operational)
■Object detection function
The system detects objects based
on their size, profile, motion, etc.
However, an object may not be
detected depending on the sur-
rounding brightness and the motion,
posture, and angle of the detected
object, preventing the system from
operating properly. ( P.320)
The illustration sh ows an image of
detectable objects.
■Cancelation of t he pre-collision
braking
If either of the fo llowing occur while
the pre-collision braking function is
operating, it will be canceled:
●The accelerator pedal is
depressed strongly.
●The steering wheel is turned
sharply or abruptly.
■Conditions under which the
system may operate even if
there is no possibility of a colli-
sion
●In some situations such as the fol-
lowing, the system may determine
that there is a possibility of a fron-
tal collision and operate.
• When passing a detectable object, etc.
• When changing lanes while over-
taking a detectable object, etc.
• When approaching a detectable object in an adjacent lane or on
the roadside, such as when
changing the course of travel or
driving on a winding road
• When rapidly closing on a detect- able object, etc.
• When approaching objects on the roadside, such as detectable
objects, guardrails, utility poles,
trees, or walls
• When there is a d etectable object
or other object by the roadside at
Detectable objectsVehicle speedRelative speed between
your vehicle and object
VehiclesApprox. 7 to 110 mph (10 to 180 km/h)Approx. 7 to 110 mph (10 to 180 km/h)
Bicyclists and pedestri- ansApprox. 7 to 50 mph (10 to 80 km/h)Approx. 7 to 50 mph (10 to 80 km/h)

3235-5. Using the driving support systems
5
Driving
LTA (Lane Tracing
Assist)
When driving on highways
and freeways with white
(yellow) lane lines, this
function alerts the driver
when the vehicle might
depart from its lane or
course
* and provides assis-
tance by operating the
steering wheel to keep the
vehicle in its lane or
course
*. Furthermore, the
system provides steering
assistance when dynamic
radar cruise control with
full-speed range is operat-
ing to keep the vehicle in its
lane.
The LTA system recognizes
white (yellow) lane lines or a
course
* using the front cam-
era. Additionally, it detects
preceding vehicles using
the front camera and radar.
*: Boundary between asphalt and the side of the road, such as
grass, soil, or a curb
WARNING
■Before using LTA system
●Do not rely solely upon the LTA
system. The LTA system does
not automatically drive the vehi-
cle or reduce the amount of
attention that m ust be paid to
the area in front of the vehicle.
The driver must always assume
full responsibilit y for driving
safely by paying careful atten-
tion to the surrounding condi-
tions and operating the steering
wheel to correct the path of the
vehicle. Also, the driver must
take adequate breaks when
fatigued, such as from driving
for a long period of time.
●Failure to perform appropriate
driving operations and pay care-
ful attention may lead to an
accident, resulting in death or
serious injury.
●When not using the LTA sys-
tem, use the LTA switch to turn
the system off.
■Situations unsuitable for LTA
system
In the following situations, use the
LTA switch to turn the system off.
Failure to do so may lead to an
accident, resulting in death or
serious injury.
●Vehicle is driven on a road sur-
face which is slippery due to
rainy weather, fallen snow,
freezing, etc.
●Vehicle is driven on a snow-cov-
ered road.
●White (yellow) lin es are difficult
to see due to rain, snow, fog,
dust, etc.
●Vehicle is driven in a temporary
lane or restricted lane due to
construction work.

3245-5. Using the driving support systems
WARNING
●Vehicle is driven in a construc-
tion zone.
●A spare tire, tire chains, etc. are
equipped.
●When the tires have been
excessively worn, or when the
tire inflation pressure is low.
●When tires of a size other than
specified are installed.
●Vehicle is driven in traffic lanes
other than that highways and
freeways.
●When your vehicle is towing a
trailer or during emergency tow-
ing
■Preventing LTA system mal-
functions and operations per-
formed by mistake
●Do not modify the headlights or
place stickers, etc. on the sur-
face of the lights.
●Do not modify the suspension
etc. If the suspension etc. needs
to be replaced, contact your
Toyota dealer.
●Do not install or place anything
on the hood or grille. Also, do
not install a grille guard (bull
bars, kangaroo bar, etc.).
●If your windshield needs
repairs, contact your Toyota
dealer.
■Conditions in which functions
may not operate properly
In the following situations, the
functions may not operate prop-
erly and the vehicle may depart
from its lane. Drive safely by
always paying careful attention to
your surroundings and operate
the steering wheel to correct the
path of the vehicle without relying
solely on the functions.
●When the follow-up cruising dis-
play is displayed ( P.328) and
the preceding vehicle changes
lanes. (Your veh icle may follow
the preceding vehicle and also
change lanes.)
●When the follow-up cruising dis-
play is displayed ( P.328) and
the preceding vehicle is sway-
ing. (Your vehicle may sway
accordingly and depart from the
lane.)
●When the follow-up cruising dis-
play is displayed ( P.328) and
the preceding vehicle departs
from its lane. (Your vehicle may
follow the preceding vehicle and
depart from the lane.)
●When the follow-up cruising dis-
play is displayed ( P.328) and
the preceding vehicle is being
driven extremely close to the
left/right lane line. (Your vehicle
may follow the preceding vehi-
cle and depart from the lane.)
●Vehicle is being driven around a
sharp curve.

3265-5. Using the driving support systems
■Lane departure alert func-
tion
When the system determines
that the vehicle might depart
from its lane or course
*, a warn- ing is displayed on the multi-
information display, and either a
warning buzzer will sound or the
steering wheel will vibrate to
alert the driver.
When the warning buzzer sounds
or the steering wheel vibrates,
check the area around your vehicle
and carefully operate the steering
wheel to move the vehicle back to
the center of the lane.
When the system determines that
the vehicle might depart from its
lane and that the possibility of a col-
lision with an overta
king vehicle in
the adjacent lane is high, the lane
departure alert will operate even if
the turn signals are operating.
*: Boundary between asphalt and the side of the road, such as
grass, soil, or a curb
■Steering assist function
When the system determines
that the vehicle might depart
WARNING
●The traffic lane is excessively
narrow or wide.
●The vehicle is extremely tilted
due to carrying heavy luggage
or having improper tire pres-
sure.
●The distance to the preceding
vehicle is extremely short.
●The vehicle is moving up and
down a large amount due to
road conditions during driving
(poor roads or road seams).
●When driving in a tunnel or at
night with the headlights off or
when a headlight is dim due to
its lens being dirty or it being
misaligned.
●The vehicle is struck by a cross-
wind.
●The vehicle is affected by wind
from a vehicle driven in a
nearby lane.
●The vehicle has just changed
lanes or crossed an intersec-
tion.
●Tires which differ by structure,
manufacturer, b rand or tread
pattern are used.
●Snow tires, etc. are equipped.
●The vehicle is being driven at
extremely high speeds.
Functions included in
LTA system

3275-5. Using the driving support systems
5
Driving
from its lane or course*, the sys-
tem provides assistance as nec-
essary by operating the steering
wheel in small amounts for a
short period of time to keep the
vehicle in its lane.
If the system detects that the steer-
ing wheel has not been operated
for a fixed amount of time or the
steering wheel is not being firmly
gripped, a warning is displayed on
the multi-information display and
the function is t emporarily can-
celed.
When the system de termines that
the vehicle might depart from its
lane and that the possibility of a col-
lision with an over taking vehicle in
the adjacent lane is high, the steer-
ing assist function will operate even
if the turn signals are operating.
*: Boundary between asphalt and
the side of the road, such as
grass, soil, or a curb
■Vehicle sway warning func-
tion
When the vehicle is swaying
within a lane, the warning
buzzer will sound and a mes-
sage will be displayed on the
multi-information display to alert
the driver.
■Lane centering function
This function is linked with
dynamic radar cruise control
with full-speed range and pro-
vides the required assistance by
operating the steering wheel to
keep the vehicle in its current
lane.
When dynamic radar cruise control
with full-speed range is not operat-
ing, the lane centering function
does not operate.
In situations where the white (yel-
low) lane lines are difficult to see or
are not visible, such as when in a

3285-5. Using the driving support systems
traffic jam, this function will operate
to help follow a preceding vehicle
by monitoring the position of the
preceding vehicle.
If the system detects that the steer-
ing wheel has not been operated
for a fixed amount of time or the
steering wheel is not being firmly
gripped, a warning is displayed on
the multi-information display and
the function is t emporarily can-
celed.
Press the LTA switch to turn the
LTA system on.
The LTA indicator illuminates and a
message is displaye d on the multi-
information display.
Press the LTA switch again to
turn the LTA system off.
When the LTA system is turned on
or off, operation of the LTA system
continues in the same condition the next time the hybrid system is
started.
LTA indicator
The illumination condition of the
indicator informs the driver of the
system operation status.
Illuminated in white: LTA system is
operating.
Illuminated in green: Steering
wheel assistance of the steering
assist function or
lane centering
function is operating.
Flashing in orange: Lane departure
alert function is operating.
Operation display of steering
wheel operation support
Displayed when the multi-informa-
tion display is swit ched to the driv-
ing support system information
display.
Turning LTA system on
Indications on multi-infor-
mation display
A
B

3295-5. Using the driving support systems
5
Driving
Indicates that steering wheel assis-
tance of the steering assist function
or lane centering function is operat-
ing.
Both outer sides of the lane are dis-
played: Indicates that steering
wheel assist of the lane centering
function is operating.
One outer side of the lane is dis-
played: Indicates that steering
wheel assist of the steering assist
function is operating.
Both outer sides of the lane are
flashing: Alerts the driver that their
input is necessary to stay in the
center of the lane (lane centering
function).
Follow-up cruising display
Displayed when the multi-informa-
tion display is switched to the driv-
ing support system information
display.
Indicates that steering assist of the
lane centering function is operating
by monitoring the position of a pre-
ceding vehicle.
When the follow-up cruising display
is displayed, if the preceding vehi-
cle moves, your vehicle may move
in the same way. Always pay care-
ful attention to your surroundings
and operate the steering wheel as
necessary to correct the path of the
vehicle and ensure safety.
Lane departure alert function
display
Displayed when the multi-informa-
tion display is switched to the driv-
ing support system information
display.
Inside of displayed lines is
white
Indicates that the system is recog-
nizing white (yellow) lines or a
course
*. When the vehicle departs
from its lane, the white line dis-
played on the side the vehicle
departs from flashes orange.
Inside of displayed lines is
black
Indicates that the system is not able
to recognize white (yellow) lines or
a course
* or is temporarily can-
celed.
*: Boundary between asphalt and the side of the road, such as
grass, soil, or a curb
■Operation conditions of each
function
●Lane departure alert function
This function operates when all of
the following conditions are met.
C
D