sensor TOYOTA YARIS 2022 Workshop Manual

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4-5. Using the driving support systems
Driving
it to automatically be canceled. Then,
the vehicle can be operated by depress- ing the accelerator pedal.
■Re-enabling the Parking Support 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.266), or turn the power switch off and then back to ON. Additionally, if the object
becomes no longer in the traveling direction of the vehicle or if the traveling direction of the vehicle changes (such
as changing from moving forward to backing up, or from backing up to mov-ing forward), the system will be re-
enabled automatically.
■If “PKSB Unavailable” is displayed on the multi-information display and the PKSB OFF indicator is on
If the vehicle is stopped due to operation of the Parking Support Brake, the Park-ing Support Brake will be disabled and
the PKSB OFF indicator will illuminate.
●A sensor may be covered with water
drops, ice, snow, dirt, etc. Remove the water drops, ice, snow, dirt, etc., from the sensor to return the system to nor-
mal. 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 system will return to
normal.
●If this message is displayed, a sensor
on the front or rear bumper may be dirty. Clean the sensors and their sur-rounding area on the bumpers.
●If this message continues to be dis-played even after cleaning the sensor,
or is displayed even though the sen- sor is clean, have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
■If a 12-volt battery terminal has
been disconnected and recon- nected
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 35 km/h (22
mph) or more.

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4-5. 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 function (static objects)*
If the sensors detect a static object, such as a wall, in the traveling
direction of the vehicle and the system determines that a colli sion
may occur due to the vehicle suddenly moving forward due to an
accidental accelerator pedal operation, the vehicle moving the unin-
tended direction due to the wrong shift position being selected, or
while parking or traveling at low speeds, the system will opera te to
lessen the impact with the detected static object and reduce th e
resulting damage.
Examples of function operation

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4-5. Using the driving support systems
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. 2 5 3
Types of sensors
WARNING
■To ensure the system can oper- ate properly
 P. 2 5 4
■If the Parking Support Brake function (static objects) oper-
ates unnecessarily, such as at a railroad crossing
 P. 2 6 8
■Notes when washing the vehicle
 P. 2 5 5

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4-5. Using the driving support systems
■The Parking Support Brake func- tion (static object) will operate
when
The function will operate when the PKSB OFF indicator is not illuminated or
flashing ( P.91, 92) and all of the fol- lowing conditions are met:
●Hybrid system output restriction con-trol• The Parking Support Brake is
enabled. • The vehicle speed is approximately 15 km/h (9 mph) or less.
• There is a static object in the traveling direction of the vehicle and approxi-mately 2 to 4 m (6 to 13 ft.) away.
• The Parking Support Brake deter- mines that a stronger-than-normal brake operation is necessary to avoid
a collision.
●Brake control
• Hybrid system output restriction con- trol is operating.• The Parking Support Brake deter-
mines that an immediate brake opera- tion is necessary to avoid a collision.
■The Parking Support Brake func-tion (static objects) will stop oper-
ating when
The function will stop operating if any of the following conditions are met:
●Hybrid system output restriction con-
trol • The Parking Support Brake is dis-abled.
• The system determines that the colli- sion has become avoidable with nor-mal brake operation.
• The static object is no longer approxi- mately 2 to 4 m (6 to 13 ft.) 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 con-
trol. • The static object is no longer approxi-mately 2 to 4 m (6 to 13 ft.) away from
the vehicle or in the traveling direction of the vehicle.
■Re-enabling the Parking Support Brake function (static objects)
 P. 2 6 9
■Detection range of the Parking Sup- port Brake function (static objects)
The detection range of the Parking Sup-
port Brake function (static objects) dif- fers from the detection range of the Toyota parking assist-sensor. ( P.258)
Therefore, even if the Toyota parking assist-sensor detects an object and pro-vides a warning, the Parking Support
Brake function (static objects) may not start operating.
■Objects which the system may not be properly detected
 P. 2 5 6
■Toyota parking assist-sensor buzzer
Regardless of whether the Toyota park-
ing assist-sensor buzzer is enabled or not ( P.254), if the Parking Support Brake function (static objects) is enabled
( P.266), the front or rear sensors detect an object and brake control is performed, the Toyota parking assist-
sensor buzzer will sound to notify the driver of the approximate distance to the object.
■Situations in which the system may
not operate properly
 P. 2 5 6
■Situations in which the system may operate even if there is no possibil-
ity of a collision
 P. 2 5 7

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4-5. Using the driving support systems
Driving
*: If equipped
This function will operate in situations such as the following if a vehicle is
detected in the traveling direction of the vehicle.
■When reversing, a vehicle is approaching and the brake pedal is not
depressed, or is depressed late
 P. 2 4 9
■The Parking Support Brake func- tion (rear-crossing vehicles) will
operate when
The function will operate when the PKSB OFF indicator is not illuminated or
flashing ( P.91, 92) and all of the fol- lowing conditions are met:
●Hybrid system output restriction con-trol• The Parking Support Brake is
Parking Support Brake function (rear-crossing vehi-
cles)*
If a rear radar sensor detects a vehicle approaching from the r ight
or left at the rear of the vehicle and the system determines th at the
possibility of a collision is h igh, this function will perform brake
control to reduce the likelihood of an impact with the approach ing
vehicle.
Examples of function operation
Types of sensors
WARNING
■To ensure the system can oper- ate properly
 P. 2 6 0

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4-5. Using the driving support systems
Driving
■ECB (Electronically Con-
trolled Brake System)
The electronically controlled sys-
tem generates braking force corre-
sponding to the brake operation
■ABS (Anti-lock Brake System)
Helps to prevent wheel lock when
the brakes are applied suddenly, or
if the brakes are applied while driv-
ing on a slippery road surface
■Brake assist
Generates an increased level of
braking force after the brake pedal
is depressed when the system
detects a panic stop situation
■VSC (Vehicle Stability Control)
Helps the driver to control skidding
when swerving suddenly or turning
on slippery road surfaces.
■VSC+ (Vehicle Stability Con-
trol+)
Provides cooperative control of the
ABS, TRC, VSC and EPS.
Helps to maintain directional stabil-
ity when swerving on slippery road
surfaces by controlling steering per-
formance.
■TRC (Traction Control)
Helps to maintain drive power and
prevent the drive wheels from spin-
ning when starting the vehicle or
accelerating on slippery roads
■Active Cornering Assist (ACA)
Helps to prevent the vehicle from
drifting to the outer side by perform-
ing inner wheel brake control when
attempting to accelerate while turn-
ing
■Hill-start assist control
Helps to reduce the backward
movement of the vehicle when
starting on an uphill
■EPS (Electric Power Steering)
Employs an electric motor to
reduce the amount of effort needed
to turn the steering wheel.
■Emergency brake signal
When the brakes are applied sud-
denly, the emergency flashers auto-
matically flash to alert the vehicle
behind.
■Secondary Collision Brake
When the SRS airbag sensor
detects a collision and the system
operates, the brakes and brake
Driving assist systems
To keep driving safety and per-
formance, the f ollowing sys-
tems operate automatically in
response to various driving sit-
uations. Be aware, however,
that these systems are supple-
mentary and should not be
relied upon too heavily when
operating the vehicle.
Summary of the driving
assist systems

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4-5. Using the driving support systems
ates:
●The emergency flashers are off
●Actual vehicle speed is over 55 km/h (35 mph)
●The system judges from the vehicle deceleration that it is a sudden brak-ing operation.
■Automatic system cancelation of
emergency brake signal
The emergency brake signal will be can- celed in any of the following situations:
●The emergency flashers are turned on.
●The system judges from the vehicle deceleration that is not a sudden brak-
ing operation.
■Secondary Collision Brake operat- ing cancelation
The system operates when the SRS air-
bag sensor detects a collision while the vehicle is in motion.However, the system does not operate
when components are damaged.
■Secondary Collision Brake auto- matic cancelation
The system is automatically canceled in
any of the following situations.
●The vehicle speed drops approxi-
mately 0 km/h (0 mph)
●A certain amount of time elapses
during operation
●The accelerator pedal is depressed a
large amount
WARNING
■The ABS does not operate effec- tively when
●The limits of tire gripping perfor-mance have been exceeded (such as excessively worn tires on a snow
covered road).
●The vehicle hydroplanes while driv-
ing at high speed on wet or slick roads.
■Stopping distance when the ABS is operating may exceed that of normal conditions
The ABS is not designed to shorten the vehicle’s stopping distance. Always maintain a safe distance from
the vehicle in front of you, especially in the following situations:
●When driving on dirt, gravel or snow-covered roads
●When driving with tire chains
●When driving over bumps in the
road
●When driving over roads with pot-
holes or uneven surfaces
■TRC/VSC may not operate effec-
tively when
Directional control and power may not be achievable while driving on slip-
pery road surfaces, even if the TRC/VSC system is operating. Drive the vehicle carefully in conditions
where stability and power may be lost.
■Active Cornering Assist does not operate effectively when
●Do not overly rely on Active Corner-
ing Assist. Active Cornering Assist may not operate effectively when accelerating down slopes or driving
on slippery road surfaces.
●When Active Cornering Assist fre-
quently operates, Active Cornering Assist may temporarily stop operat-ing to ensure proper operation of
the brakes, TRC and VSC.
■Hill-start assist control does not
operate effectively when
●Do not overly rely on hill-start assist control. Hill-start assist control may
not operate effectively on steep inclines and roads covered with ice.

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6-1. Maintenance and care
Maintenance and care
off.
●Wipe the surface with a dry, soft cloth to remove any remaining moisture.
●To remove oily deposits, use alcohol wet wipes or a similar product.
WARNING
■When washing the vehicle
Do not apply water to the inside of the engine compartment. Doing so may
cause the electrical components, etc. to catch fire.
■When cleaning the windshield (vehicles with rain-sensing wind-shield wipers)
Set the wiper switch to off. If the wiper switch is in “AUTO”, the wipers may operate unexpectedly in the following
situations, and may result in hands being caught or other serious injuries and cause damage to the wiper
blades.
Off
AUTO
●When the upper part of the wind- shield where the raindrop sensor is
located is touched by hand
●When a wet rag or similar is held
close to the raindrop sensor
●If something bumps against the
windshield
●If you directly touch the raindrop
sensor body or if something bumps into the raindrop sensor
■Precautions regarding the exhaust pipe
Exhaust gasses cause the exhaust
pipe to become quite hot. When washing the vehicle, be careful not to touch the pipe until it has
cooled sufficiently, as touching a hot exhaust pipe can cause burns.
■Precaution regarding the rear bumper with Blind Spot Monitor (if equipped)
If the paint of the rear bumper is chipped or scratched, the system may malfunction. If this occurs, consult
with any authorized Toyota retailer or Toyota authorized repairer, or any reli-able repairer.
NOTICE
■To prevent paint deterioration and corrosion on the body and components (aluminum wheels,
etc.)
●Wash the vehicle immediately in the following cases:
• After driving near the sea coast
• After driving on salted roads
• If coal tar or tree sap is present on
the paint surface
• If dead insects, insect droppings or
bird droppings are present on the paint surface
• After driving in an area contami- nated with soot, oily smoke, mine dust, iron powder or chemical sub-
stances
• If the vehicle becomes heavily
soiled with dust or mud
• If liquids such as benzene and gas-
oline are spilled on the paint sur- face
●If the paint is chipped or scratched, have it repaired immediately.

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7-2. Steps to take in an emergency
When trouble arises
■Toyota parking assist-sensor OFF indicator (warning buzzer)
■“RCTA OFF” indicator (warning buzzer)
■PKSB OFF indicator
Warning lightDetails/Actions
(Flashes)
(if equipped)
Indicates a malfunction in the Toyota parking assist-sensor fun c-
tion
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Indicates that the system is temporarily unavailable, possibly due
to a sensor being dirty or covered with ice, etc.
 Follow the instructions displayed on the multi-information
display. ( P.255)
Warning lightDetails/Actions
(Flashes)
(if equipped)
Indicates a malfunction in the RCTA (Rear Crossing Traffic Aler t)
function
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
Indicates that the rear bumper around the radar sensor is cover ed
with dirt, etc. ( P.249)
 Follow the instructions displayed on the multi-information
display. ( P.261)
Warning lightDetails/Actions
(if equipped)
When a buzzer sounds:
Indicates a malfunction in the PKSB (Parking Support Brake) sys -
tem
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.
When a buzzer does not sound:
Indicates that the system is temporarily unavailable, possibly due
to a sensor being dirty or covered with ice, etc.
 Follow the instructions displayed on the multi-information
display. ( P.269, 383)

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7-2. Steps to take in an emergency
When trouble arises
■Brake hold operated indicator
■Warning buzzer
In some cases, the buzzer may not be heard due to being in a noisy location or
audio sound.
■Front passenger detection sensor, seat belt reminder and warning buzzer
●If luggage is placed on the front pas-senger seat, the front passenger
detection sensor may cause the warn- ing light to flash and the warning buzzer to sound even if a passenger
is not sitting in the seat.
●If a cushion is placed on the seat, the
sensor may not detect a passenger, and the warning light may not operate properly.
■If the malfunction indicator lamp
comes on while driving
For some models, the malfunction indi- cator lamp will come on if the fuel tank
becomes completely empty. If the fuel tank is empty, refuel the vehicle immedi-ately. The malfunction indicator lamp will
go off after several trips.
If the malfunction indicator lamp does not go off, contact any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer as soon as possi-ble.
■Electric power steering system
warning light (warning buzzer)
When the 12-volt battery charge becomes insufficient or the voltage tem-
porarily drops, the electric power steer- ing system warning light may come on and the warning buzzer may sound.
■When the tire pressure warning light comes on
Inspect the tires to check if a tire is
punctured.
If a tire is punctured: P.386, 397
If none of the tires are punctured:
Turn the power switch off then turn it to ON. Check if the tire pressure warning light comes on or blinks.
If the tire pressure warning light blinks for approximately 1 minute then stays on
There may be a malfunction in the tire pressure warning system. Have the vehicle inspected by any authorized
Toyota retailer or Toyota authorized repairer, or any reliable repairer immedi-ately.
If the tire pressure warning light comes on
1 After the temperature of the tires has lowered sufficiently, check the infla-
tion pressure of each tire and adjust them to the specified level.
2 If the warning light does not turn off even after several minutes have
elapsed, check that the inflation pressure of each tire is at the speci-fied level and perform initialization.
( P.337)
■The tire pressure warning light may come on due to natural causes
The tire pressure warning light may come on due to natural causes such as natural air leaks and tire inflation pres-
sure changes caused by temperature. In this case, adjusting the tire inflation pressure will turn off the warning light
(after a few minutes).
Warning lightDetails/Actions
(Flashes)
Indicates a malfunction in the brake hold system
 Have the vehicle inspected by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable
repairer immediately.