brake sensor TOYOTA RAV4 PRIME 2021 Owner's Manual

3765-5. Using the driving support systems
●When the distance between your
vehicle and metal objects, such as
a guardrail, wall, sign, or parked
vehicle, which may reflect electri-
cal waves toward the rear of the
vehicle, is short
●When there are spinning objects
near your vehicle such as the fan
of an air conditioning unit
●When water is splashed or
sprayed toward t he rear bumper,
such as from a sprinkler
■Situations in which the Parking
Support Brake function (rear-
crossing vehicles) may not
operate properly
In some situations, such as the fol-
lowing, the radar sensors may not
detect an object and this function
may not operate properly
●Stationary objects
●When a sensor or the area around
a sensor is extremely hot or cold
●If the rear bumper is covered with
ice, snow, dirt, etc.
●When it is raining heavily or water
strikes the vehicle
●When the detecti on area of a
radar sensor is obstructed by an
adjacent vehicle
●If the vehicle is s ignificantly tilted
●When equipment that may
obstruct a sensor is installed, such
as a towing eyelet, bumper pro-
tector (an additional trim strip,
etc.), bicycle carrier, or snow plow
●If the suspension has been modi-
fied or tires of a size other than
specified are installed
●If the front of the v ehicle is raised
or lowered due to the carried load
●If a sticker or an electronic compo-
nent, such as a backlit license
plate (especially fluorescent type),
fog lights, fender pole or wireless
antenna is installed near a radar
sensor
●If the orientation of a radar sensor
has been changed
●When multiple vehicles are
approaching with only a small gap
between each vehicle
●If a vehicle is approaching the rear
of your vehicle rapidly
●Situations in which the radar sen-
sor may not detect a vehicle
• When a vehicle approaches from
the right or left at the rear of the
vehicle while you are turning while
backing up
• When turning while backing up
• When backing out of a shallow angle parking spot

3815-5. Using the driving support systems
5
Driving
■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 maintai n directional
stability when swerving on slip-
pery road surfaces by con-
trolling steering performance.
■Trailer Sway Control
Helps the driver to control trailer
sway by selectively applying
brake pressure for individual
wheels and reducing driving
torque when trailer sway is
detected.
■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
■E-Four (Electronic On-
Demand AWD system)
Automatically switches from
front wheel drive to all-wheel
drive (AWD) according to the
driving conditions, helping to
ensure reliable handling and
stability. Examples of condi-
tions where the system will
switch to AWD are when corner-
ing, going uphill, starting off or
accelerating, and when the road
surface is slippery due to snow,
rain, etc.
■The Secondary Collision
Brake
When the SRS airbag sensor
detects a collision and the sys-
tem operates, the brakes and
brake lights are automatically
controlled to reduce the vehicle
speed and help reduce the pos-
sibility of further damage due to
a secondary collision.
■When the
TRAC/VSC/ABS/T railer Sway
Control systems are operating
The slip indicator light will flash
while the TRAC/VSC/ABS/Trailer
Sway Control systems are operat-
ing.

3835-5. Using the driving support systems
5
Driving
edly, when the hybrid system is
started or just after the vehicle
begins to move. This sound does
not indicate that a malfunction has
occurred in any of these systems.
●Any of the following conditions
may occur when the above sys-
tems are operating. None of these
indicates that a malfunction has
occurred.
• Vibrations may be felt through the
vehicle body and steering.
• A motor sound may be heard also after the vehicle comes to a stop.
■ECB operating sound
ECB operating sound may be heard
in the following cases, but it does
not indicate that a malfunction has
occurred.
●Operating sound heard from the
engine compartment when the
brake pedal is operated.
●Motor sound of the brake system
heard from the front part of the
vehicle when the driver’ door is
opened.
●Operating sound heard from the
engine compartment when one or
two minutes passed after the stop
of the hybrid system.
■Active Cornering Assist opera-
tion sounds and vibrations
When the Active Cornering Assist is
operated, operation sounds and
vibrations may b e generated from
the brake system, but this is not a
malfunction.
■EPS operation sound
When the steering wheel is oper-
ated, a motor sou nd (whirring
sound) may be heard. This does not
indicate a malfunction.
■Automatic reactivation of
TRAC, Trailer Sway Control and
VSC systems
After turning the TRAC, Trailer
Sway Control and VSC systems off,
the systems will be automatically re-
enabled in the following situations:
●When the power switch is turned
off.
●If only the TRAC sy stem is turned
off, the TRAC will turn on when
vehicle speed increases.
If both the TRAC and VSC sys-
tems are turned of f, automatic re-
enabling will not occur when vehi-
cle speed increases.
■Operating conditions of Active
Cornering Assist
The system operates when the fol-
lowing occurs.
●TRAC/VSC can operate
●The driver is attempting to accel-
erate while turning
●The system detects that the vehi-
cle is drifting to the outer side
●The brake pedal is released
■Reduced effectiveness of the
EPS system
The effect iveness of the EPS sys-
tem is reduced to prevent the sys-
tem from overheating when there is
frequent steering input over an
extended period of time. The steer-
ing wheel may feel heavy as a
result. Should this occur, refrain
from excessive steering input or
stop the vehicle a nd turn the hybrid
system off. The EPS system should
return to normal within 10 minutes.
■Secondary Collision Brake
operating conditions
The system operates when the SRS
airbag sensor de tects a collision
while the vehicle is in motion. How-
ever, the system does not operate in
any of the following situations.
●The vehicle speed is below 6 mph
(10 km/h)
●Components are damaged
■Secondary Collision Brake
automatic cancellation
The system is automatically can-
celed in any of th e following situa-
tions.

5158-2. Steps to take in an emergency
8
When trouble arises
*: This light illuminat es on the multi-information display.
■PKSB OFF indicator* (warning buzzer)
*: This light illuminates on the multi-information display.
■BSM OFF indicator* (warning buzzer)
*: This light illuminates on the multi-information display.
Warning lightDetails/Actions
(If equipped)
If “Parking Support Brake Malfunction Visit Your
Dealer” is displayed on the multi-information
display:
Indicates a malfunctio n in the PKSB (Parking
Support Brake) system
 Have the vehicle inspected by your Toyota
dealer immediately.
If “Parking Assist Unavailable” is displayed on
the multi-information display:
Indicates that the system is temporarily unavail-
able, possibly due to a sensor being dirty or cov-
ered with ice, etc.
 Follow the instructions displayed on the
multi-information display. ( P.367, 523)
Warning lightDetails/Actions
Indicates a malfunction in the BSM (Blind Spot
Monitor) function
 Have the vehicle inspected by your Toyota
dealer immediately.
Indicates that the rear bumper around the radar
sensor is covered with dirt, etc. ( P.350)
 Follow the instructions displayed on the
multi-information display. ( P.348, 523)

5168-2. Steps to take in an emergency
■RCTA OFF indicator* (warning buzzer)
*: This light illuminat es on the multi-information display.
■Slip indicator light
■Brake Override System/Drive-Start Control/PKSB (if
equipped) warning light* (warning buzzer)
*: This light illuminates on the mu lti-information display with a message.
Warning lightDetails/Actions
(If equipped)
Indicates a malfunctio n in the RCTA (Rear
Cross Traffic Alert) function
 Have the vehicle inspected by your Toyota
dealer immediately.
Indicates that the rear bumper around the radar
sensor is covered with dirt, etc. ( P.350)
 Follow the instructions displayed on the
multi-information display. ( P.348, 523)
Warning lightDetails/Actions
Indicates a malfunction in:
The VSC/Trailer Sway Control system;
 The TRAC system;
 The Trail Mode function; or
 The hill-start assist control system
 Have the vehicle inspected by your Toyota
dealer immediately.
Warning lightDetails/Actions
When a buzzer sounds:
Brake Override System is malfunctioning;
 Drive-Start Control is operating;
 Drive-Start Control is malfunctioning; or
 Parking Support Brake function (for static
objects) (if equipped) is operating
 Follow the instructions displayed on the
multi-information display and head-up
display (if equipped).
When a buzzer does not sound:
Brake Override System is operating
 Release the accelerator pedal and
depress the brake pedal.

597What to do if... (Troubleshooting)
tem can be started in a tem-
porary way. (P.538)
 Is the 12-volt battery dis-
charged? ( P.539)
 Is the power switch in ON?
If you cannot release the shift
lever by depressing the brake
pedal with the power switch in
ON ( P.286)
 It is locked automatically to
prevent theft of the vehicle.
( P.280)
 Is the window lock switch
pressed?
The power window except for
the one at the driver’s seat
cannot be operated if the win-
dow lock switch is pressed.
( P.248)
 The auto power off function
will be operated if the vehicle
is left in ACC or ON (the
hybrid system is not operat- ing) for a period of time.
(
P.283)
 The seat belt reminder light is
flashing
Are the driver and the passengers
wearing the seat belts? ( 
P.518,
519
)
 The parking brake indicator is
on
Is the parking br ake released?
( 
P.290)
Depending on the situation,
other types of warning buzzer
may also sound. ( P.511, 523)
 Did anyone inside the vehicle
open a door during setting the
alarm?
The sensor detects it and the
alarm sounds. ( P.73)
To stop the alarm, turn the power
switch to ON or start the hybrid sys-
tem.
 Is the message displayed on
the multi-information display?
Check the message on the
multi-information display.
The shift lever cannot be
shifted from P even if you
depress the brake pedal
The steering wheel can-
not be turned after the
hybrid system is stopped
The windows do not open
or close by operating the
power window switches
The power switch is
turned off automatically
A warning buzzer sounds
during driving
An alarm is activated and
the horn sounds (if
equipped)
A warning buzzer sounds
when leaving the vehicle

599Alphabetical Index
Alphabetical Index
A
A/C“My Room Mode” ................. 144
Air conditioning filter ............. 483
Automatic air conditioning sys-tem ..................................... 396
Eco air conditioning mode .... 397
Front seat concentrated airflow mode (S-FLOW) ................. 402
Humidity sensor ................... 404
Remote Air Conditioning System ........................................... 405
ABS (Anti-lock Brake System) ............................................... 380Function ............................... 380
Warning light ........................ 513
ACA (Active Cornering Assist) ............................................... 381
AC charging cable .................. 102 CCID (Charging Circuit Interrupt-ing Device) ......................... 103
If the charging connector cannot be unlocked ........................ 110
Indicator ............................... 104
Locking and unlocking.......... 108
Maintenance......................... 106
Safety functions.................... 104
Acoustic Vehicle Alerting Sys- tem ........................................... 85
Active Cornering Assist (ACA) ............................................... 381
Adaptive Front-lighting System (AFS)...................................... 297
AFS (Adaptive Front-lighting System) ................................. 297
Airbags ...................................... 34 Airbag operating conditions.... 36
Airbag precautions for your child............................................. 39
Airbag warning light.............. 513
Correct driving posture ........... 27 Curtain shield airbag operating
conditions .............................37
Curtain shield air bag precautions
.............................................39
Front passenger occupant clas- sification system ...................44
General airbag precautions ....39
Locations of airbags ...............34
Modification and disposal of air- bags......................................42
Seat cushion airbag................34
Side airbag operating conditions .............................................37
Side airbag precautions..........39
Side and curtain shield airbags operating conditions .............37
Side and curtain shield airbags precautions ...........................39
SRS airbag instructions for Canadian owners ...............586
SRS airbags ...........................34
SRS warning light .................513
Air conditioning filter .............483
Air conditioning system “My Room Mode” ..................144
Air conditioning filter .............483
Automatic air conditioning sys-tem .....................................396
Eco air conditioning mode ....397
Front seat concent rated airflow
mode (S-FLOW) .................402
Remote Air Conditioning System ...........................................405
Air intake vent ...........................91 Cleaning ...............................486
Alarm .........................................73 Alarm ......................................73
Warning buzzer .. ..................511
Anchor brackets ... ..............53, 62
Antenna (Smart key system) .217
Anti-lock brake system (ABS)380 Function................................380

600Alphabetical Index
Warning light ........................ 513
Approach warning .................. 343
Armrest ................................... 434
Assist grips ............................. 434
AUTO EV/HV mode ................... 77
AUTO EV/HV mode switch....... 78
Automatic air conditioning sys- tem ......................................... 396“My Room Mode” ................. 144
Air conditioning filter ............. 483
Eco air conditioning mode .... 397
Front seat concentrated airflow mode (S-FLOW) ................. 402
Remote Air Conditioning System ........................................... 405
Automatic door locking and unlocking systems ............... 202
Automatic headlight leveling system ................................... 296
Automatic High Beam (AHB) . 298
Automatic light control system ............................................... 296
Auxiliary boxes ....................... 415
Average fuel consumption .... 189
Average fuel economy ........... 172
Average vehicle speed .. 176, 189
B
Back door ................................ 203 Hands Free Power Back Door........................................... 208
Power back door .................. 207
Wireless remote control ....... 207
Back-up lights Replacing light bulbs ............ 497
Wattage ................................ 556
Battery (12-volt battery) ......... 466 If the 12-volt battery is dis-charged .............................. 539
Preparing and c hecking before
winter.................................. 387
Replacing ............................. 542 Warning light ........................511
Battery (traction battery)..........87 Charging ...............................123
Location ..................................87
Specification .........................552
Blind Spot Monitor (BSM) ......347 Blind Spot Monitor function ..350
Rear Cross Traffic Alert function...........................................353
Bottle holders .........................415
Brake Brake Hold ............................293
Fluid......................................464
Parking brake .......................290
Regenerative braking .............82
Warning light ........................511
Brake assist ............................380
Brake Hold...............................293
Brake Override System ..........259
Break-in tips ............................259
Brightness control Instrument panel light control169
BSM (Blind Spot Monitor) ......347 Blind Spot Monitor function ..350
Rear Cross Traffic Alert function...........................................353
C
Care Aluminum wheels .................444
Exterior .................................444
Front camera ........................310
Interior ..................................447
Radar sensor ........................310
Seat belts .............................447
Water-repellent coating ........445
Cargo capacity ................265, 268
Cargo hooks............................417
Chains......................................389
Charging “My Room Mode” ..................144
AC charging cable ................102

Alphabetical Index607
M
MaintenanceDo-it-yourself maintenance .. 455
General maintenance ........... 451
Maintenance data................. 550
Maintenance requirements... 450
Malfunction indicator lamp.... 512
Menu icons ............................. 171
Meter “ODO TRIP” switch .............. 169
Clock .................................... 169
Head-up display ................... 182
Indicators.............................. 163
Instrument panel light control169
Meter control switches ......... 171
Multi-information display ...... 170
Settings ........................ 177, 570
Units ............................. 179, 570
Warning lights .............. 161, 511
Warning messages ...... 181, 523
Meter control switches .......... 171
Mirrors Digital Rear-view Mirror........ 234
Inside rear view mirror.......... 233
Outside rear view mirror defog-gers .................................... 398
Outside rear view mirrors ..... 244
Vanity mirrors ....................... 420
Moon roof Door lock linked moon roof oper-ation ................................... 249
Jam protection function ........ 249
Operation ............................. 249
Warning message ................ 250
Multi-information display Audio system-linked display . 175
BSM (Blind Spot Monitor)..... 347
Changing the display............ 171
Display contents ................... 170
Driving information display ... 172
Driving support system informa- tion display .........................175
Dynamic radar cruise control with full-speed range ..........336
Energy monitor/consumption screen.................................187
Hybrid System Indicator .......167
Intuitive parking assist-sensor ...........................................356
Language .....................179, 570
LTA (Lane Traci ng Assist) ....328
Menu icons ...........................171
Meter control switches..........171
Navigation system-linked display ...........................................175
Parking Support Brake function ...........................................365
PCS (Pre-Collisio n System) .315
Pop-up display......................179
RSA (Road Sign Assist) .......333
Settings ........................177, 570
Suggestion function ......181, 570
Tire pressure ...... ..................471
Units .............................179, 570
Vehicle information display...176
Warning message display ....181
Warning messages ...............523
“My Room Mode” ...................144
N
Navigation system-linked display ...............................................175
Noise from under ve hicle...........6
Normal mode...........................377
O
Odometer.................................165 “ODO TRIP” switch ...............169
“ODO TRIP”switch .................169
Oil Engine oil..............................552
Opener

608Alphabetical Index
Back door ..................... 205, 207
Fuel filler door ...................... 307
Garage door ......................... 435
Hood..................................... 457
Outer foot lights Replacing light bulbs ............ 497
Wattage ................................ 556
Outside rear view mirrors ...... 244 Adjusting and folding ............ 244
BSM (Blind Spot Monitor)..... 347
Outside rear view mirror defog-gers .................................... 398
Outside temperature display . 168
Overheating ............................ 544
P
Paddle shift switches ............. 287
Panic mode ............................. 196
Panoramic moon roof Jam protection function ........ 253
Operation ............................. 252
Warning message ................ 254
Parking assist sensors (intuitive parking assist) ...................... 356
Parking brake Operation ............................. 290
Parking brake engaged warning buzzer ................................ 292
Warning light ........................ 517
Warning message ................ 291
Parking lights Light switch .................. 295, 295
Replacing light bulbs ............ 497
Wattage ................................ 556
Parking Support Brake (PKSB) ............................................... 363Indicator ............................... 163
Parking Support Brake function (rear-crossing vehicles) ...... 373
Parking Support Brake function (static objects) .................... 368
Warning light ........................ 515 Warning message .
...............367
PCS (Pre-Collision System) Enabling/disabling the pre-colli-sion system ........................317
Function................................315
Warning light ........................514
Warning messag e ........313, 526
Personal lights ........................411 Switch ...................................411
Wattage ................................556
PKSB (Parking Support Brake) ...............................................363Indicator................................163
Parking Support Brake function (rear-crossing vehicles) ......373
Parking Support Brake function (static objects) ....................368
Warning light ........................515
Warning message . ...............367
Plug-in hybrid system ..............76 AUTO EV/HV mode switch .....78
AUTO EV/HV mode ................77
Driving tips..............................92
EV driving range .....................95
EV mode.................................77
EV/HV mode selection switch 78
Features .................................76
How to charge ......................123
HV mode ................................77
Hybrid battery (tr action battery)
charge mode ........................77
Power back door switch 207, 207
Power control unit coolant ....462 Capacity ...............................553
Checking ..............................463
Preparing and checking before winter ..................................387
Radiator ................................463
Power outlets ..................420, 421
Power sources ........................111
Power steering (Electric Power Steering system)...................381