brake TOYOTA GR YARIS 2022 Service Manual

217
4
Owner's Manual_Europe_M52P63_en
4-5. Using the driving support systems
Driving
authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer immediately.
■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.
NOTICE
■To prevent the GPF system from
not operating properly
●Do not use fuel other than the spec- ified type
●Do not modify the exhaust pipes
Driving assist systems
To keep driving safety and per-
formance, the following 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

218
Owner's Manual_Europe_M52P63_en
4-5. Using the driving support systems
■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
■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.
■Active Torque Split AWD sys-
tem
Automatically switches from front-
wheel drive to all-wheel drive
(AWD) according to the driving con-
ditions, helping to ensure reliable
handling and stability. Examples of
conditions where the system will
switch to AWD are when cornering,
going uphill, starting off or acceler-
ating, and when the road surface is
slippery due to snow, rain, etc.
■Emergency brake signal
When the brakes are applied sud-
denly, the emergency flashers auto-
matically flash to alert the vehicle
behind.
■The secondary Collision Brake
(if equipped)
When the SRS airbag sensor
detects a collision and the system
operates, the brakes and brake
lights are automatically controlled
to reduce the vehicle speed and
help reduce the possibility of further
damage due to a secondary colli-
sion.
■When the TRC/VSC systems are operating
The slip indicator light will flash while the
TRC/VSC systems are operating.
■Disabling the TRC system
If the vehicle gets stuck in mud, dirt or
snow, the TRC system may reduce
power from the engine to the wheels.
Pressing to turn the system off may
make it easier for you to rock the vehicle
in order to free it.
To turn the TRC system off, quickly
press and release .
The “TRC OFF” indicator light will come
on.
Press again to turn the system
back on.
■Turning off both TRC and VSC sys-
tems
To turn the TRC and VSC systems off,

219
4
Owner's Manual_Europe_M52P63_en
4-5. Using the driving support systems
Driving
press and hold for more than 3 sec-
onds while the vehicle is stopped.
The “TRC OFF” indicator light and the
VSC OFF indicator light will come on.*
Press again to turn the system
back on.
*: On vehicles with PCS (Pre-Collision
System), PCS will also be disabled
(only Pre-Collision warning is avail-
able). The PCS warning light will
come on and a message will be dis-
played on the multi-information dis-
play. ( P.169)
■Expert mode
When expert mode is selected, it is pos- sible to drive in a more sporty manner
than other drive modes. Expert mode disables the TRC and VSC systems but the engine and brakes may be con-
trolled depending on the vehicle behav- ior.
To select expert mode, press when
in SPORT mode or TRACK mode.
The “EXPERT” indicator will come on
together with the TRC OFF and VSC
OFF indicators.
To cancel expert mode, press or
use the AWD mode select switch to
select normal mode.
●The following are the TRC, VSC, and
Expert mode states when is
pressed during each driving mode:
■When the “TRC OFF” indicator light
comes on even if has not been
pressed
TRC is temporary deactivated. If the indicator light continues to remain on, contact any authorized Toyota retailer or
Toyota authorized repairer, or any reli-
Driving mode
Normal
mode
Sport mode or
Track mode
TRCOFFOFF
VSCOperable
stateOFF
Expert
modeOFFON
Indicators—

220
Owner's Manual_Europe_M52P63_en
4-5. Using the driving support systems
able repairer.
■Operating conditions of hill-start
assist control
When the following four conditions are met, the hill-start assist control will oper-
ate:
●The shift lever is in a position other
than R when starting off forward on an upward incline, or the shift lever is in R when starting off backward on an
upward incline.
●The vehicle is stopped
●The accelerator pedal is not depressed
●The parking brake is not engaged
●Engine switch is turned to ON
■Automatic system cancelation of hill-start assist control
The hill-start assist control will turn off in
any of the following situations:
●The shift lever is shifted to R when
starting off forward on an upward incline, or the shift lever is shifted to other than R when starting off back-
ward on an upward incline.
●The accelerator pedal is depressed
●The parking brake is engaged
●2 seconds at maximum elapsed after the brake pedal is released
●Engine switch is turned to OFF
■Sounds and vibrations caused by the ABS, brake assist, VSC, TRC and hill-start assist control sys-
tems
●A sound may be heard from the
engine compartment when the brake pedal is depressed repeatedly, when the engine 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 systems 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.• The brake pedal may pulsate slightly
after the ABS is activated. • The brake pedal may move down slightly after the ABS is activated.
■EPS operation sound
When the steering wheel is operated, a motor sound (whirring sound) may be heard. This does not indicate a malfunc-
tion.
■Automatic reactivation of TRC and VSC systems
After turning the TRC and VSC systems
off, the systems will be automatically re- enabled in the following situations:
●When the engine switch is turned off
●If only the TRC system is turned off,
the TRC will turn on when vehicle speed increases.If both the TRC and VSC systems are
turned off, automatic re-enabling will not occur when vehicle speed increases.
■Reduced effectiveness of the EPS
system
The effectiveness of the EPS system is reduced to prevent the system from
overheating when there is frequent steering input over an extended period of time. The steering wheel may feel
heavy as a result. Should this occur, refrain from excessive steering input or stop the vehicle and turn the engine off.
The EPS system should return to nor- mal within 10 minutes.
■Operating conditions of emergency brake signal
When the following conditions are met, the emergency brake signal will oper-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-

221
4
Owner's Manual_Europe_M52P63_en
4-5. Using the driving support systems
Driving
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 conditions (if equipped)
The system operates when the SRS air-
bag sensor detects a collision while the vehicle is in motion.However, the system does not operate
in any of the following situations.
●The vehicle speed is below 10 km/h (6 mph)
●Components are damaged
■Secondary Collision Brake auto-matic cancelation (if equipped)
The system is automatically canceled in any of the following situations.
●The vehicle speed drops below approximately 10 km/h (6 mph)
●A certain amount of time elapses during operation
●The accelerator pedal is depressed a large amount
■If a message about AWD is shown on the multi-information displa y
Perform the following actions.
MessageDetails/Actions
“AWD System
Overheated
Switching to
2WD Mode”
AWD system is overheating.
 Perform the following actions.
• Stop the vehicle in a safe place and let the engine idle.*
Once the display message on the multi-information display turns
off, there is no problem continuing to drive.
If the message does not disappear, have your vehicle checked by
any authorized Toyota retailer or Toyota authorized repairer, o r any
reliable repairer immediately.

223
4
Owner's Manual_Europe_M52P63_en
4-5. Using the driving support systems
Driving
WARNING
●Unlike the parking brake, hill-start assist control is not intended to hold
the vehicle stationary for an extended period of time. Do not attempt to use hill-start assist con-
trol to hold the vehicle on an incline, as doing so may lead to an acci-dent.
■When the TRC/VSC is activated
The slip indicator light flashes. Always
drive carefully. Reckless driving may cause an accident. Exercise particular care when the indicator light flashes.
■When the TRC/VSC systems are turned off
Be especially careful and drive at a speed appropriate to the road condi-tions. As these are the systems to
help ensure vehicle stability and driv- ing force, do not turn the TRC/VSC systems off unless necessary.
■Expert mode precautions
●Do not use on public roads.
●Use only when the road conditions and safely of the surrounding area
can be ensured.
●Proper use of expert mode requires
a professional level of driving skill. When using expert mode, always check the road conditions and sur-
rounding area and drive more care- fully than usual.
■Replacing tires
Make sure that all tires are of the specified size, brand, tread pattern
and total load capacity. In addition, make sure that the tires are inflated to the recommended tire inflation pres-
sure level. The ABS, TRC and VSC systems will not function correctly if different tires
are installed on the vehicle. Contact any authorized Toyota retailer or Toyota authorized repairer, or any
reliable repairer for further information when replacing tires or wheels.
■Handling of tires and the suspen-sion
Using tires with any kind of problem
or modifying the suspension will affect the driving assist systems, and may cause a system to malfunction.
■Secondary Collision Brake (if equipped)
Do not rely solely upon the Secondary Collision Brake. This system is designed to help reduce the possibil-
ity of further damage due to a second- ary collision, however, that effect changes according to various condi-
tions. Overly relying on the system may result in death or serious injury.
■Active Torque Split AWD system
●The Active Torque Split AWD sys-tem is designed to ensure driving
stability on general roads and not for off-road driving such as for rally-ing. Do not subject the system to
extreme driving conditions.
●Drive carefully on slippery road sur-
faces.

225
4
Owner's Manual_Europe_M52P63_en
4-6. Driving tips
Driving
the driving conditions:
 Do not try to forcibly open a win-
dow or move a wiper that is fro-
zen. Pour warm water over the
frozen area to melt the ice. Wipe
away the water immediately to
prevent it from freezing.
 To ensure proper operation of
the climate control system fan,
remove any snow that has accu-
mulated on the air inlet vents in
front of the windshield.
 Check for and remove any
excess ice or snow that may
have accumulated on the exte-
rior lights, vehicle’s roof, chassis,
around the tires or on the brakes.
 Remove any snow or mud from
the bottom of your shoes before
getting in the vehicle.
Accelerate the vehicle slowly, keep
a safe distance between you and
the vehicle ahead, and drive at a
reduced speed suitable to road
conditions.
 Park the vehicle and shift the
shift lever to 1 or R without set-
ting the parking brake. The park-
ing brake may freeze up,
preventing it from being
released. If the vehicle is parked
without setting the parking brake,
make sure to block the wheels.
Failure to do so may be danger-
ous because it may cause the
vehicle to move unexpectedly,
possibly leading to an accident.
Use the correct tire chain size when
mounting the tire chains.
Chain size is regulated for each tire
size.
Side chain:
3 mm (0.12 in.) in diameter
10 mm (0.39 in.) in width
30 mm (1.18 in.) in length
Cross chain:
4 mm (0.16 in.) in diameter
14 mm (0.55 in.) in width
25 mm (0.98 in.) in length
Regulations regarding the use of
tire chains vary depending on loca-
tion and type of road. Always check
local regulations before installing
When driving the vehicle
When parking the vehicle
Selecting tire chains
Regulations on the use of
tire chains

247
6
Owner's Manual_Europe_M52P63_en
6-1. Maintenance and care
Maintenance and care
late on the windows for a long period.
Clean the windows with a soft, damp cloth as soon as possible.• Do not use wax or glass cleaners that
contain abrasives when cleaning the windows.• Do not use any metallic objects to
remove condensation build up.
●When the water-repellent perfor-
mance has become insufficient, the coating can be repaired. Consult any authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer.
■Plated portions
If dirt cannot be removed, clean the
parts as follows:
●Use a soft cloth dampened with an
approximately 5% solution of neutral detergent and water to clean the dirt 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.
■Carbon film (if equipped)
●Do not attach a roof carrier on the car-bon-film. It may damage the film sur-
face.
●On l y u se lo w t em pe r a tu r e wat e r ; 50 ° C
(122°F) or less, for an automatic car wash and high pressure washer.
Do not use the high pressure washer to
the film edge to avoid coming off.
●Do not take heated water more than 90°C (194°F) directly. It may cause the film to come off easily.
●Only use a neutral detergent which is approved for car wash use and water.
●Do not wax or apply a coating to the film to keep film textured appearance.
●Dirt like bird droppings and oil should be cleaned off with a neutral detergent
immediately.
■Brake
●Painted brake calipers
• When using detergent, use neutral
detergent. Do not use hard brushes or abrasive cleaners, as they will dam-age the paint.
• Do not use detergent on the brake cal- ipers when they are hot.• Wash detergent off immediately after
use.
●Rust may form if the vehicle is parked
with wet brake pads or disc rotors, causing them to stick. Before parking the vehicle after it is washed, drive
slowly and apply the brakes several times to dry the parts.
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
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

249
6
Owner's Manual_Europe_M52P63_en
6-1. Maintenance and care
Maintenance and care
Remove dirt and dust using a
vacuum cleaner. Wipe dirty sur-
faces with a cloth dampened with
lukewarm water.
 If dirt cannot be removed, wipe it
off with a soft cloth dampened
with neutral detergent diluted to
approximately 1%.
Wring out any excess water from
the cloth and thoroughly wipe off
remaining traces of detergent
and water.
■Shampooing the carpets
There are several commercial foaming-
type cleaners available. Use a sponge or brush to apply the foam. Rub in over-lapping circles. Do not use water. Wipe
dirty surfaces and let them dry. Excellent results are obtained by keeping the car-pet as dry as possible.
■Handling the seat belts
Clean with mild soap and lukewarm water using a cloth or sponge. Also check the belts periodically for exces-
sive wear, fraying or cuts.
NOTICE
■When using a high pressure car wash
●Vehicles with rear view monitor sys-tem: When washing the vehicle, do not spray the camera or its sur-
rounding area directly with a high pressure washer. Shock applied from high pressure water may
cause the device to not operate normally.
●Vehicles with Toyota Safety Sense: Do not spray water directly on the radar which is equipped behind the
emblem. Otherwise it may cause the device to be damaged.
●Do not bring the nozzle tip close to boots (rubber or resin manufac-tured cover), connectors or the fol-
lowing parts. The parts may be damaged if they come into contact with high-pressure water.
• Traction related parts
• Steering parts
• Suspension parts
• Brake parts
●Keep the cleaning nozzle at least 30 cm (11.9 in.) away from the vehi-cles body. Otherwise resin section,
such as moldings and bumpers, may be deformed and damaged. Also, do not continuously hold the
nozzle in the same place.
●Do not spray the lower part of the
windshield continuously. If water enters the air conditioning system intake located near the lower part of
the windshield, the air conditioning system may not operate correctly.
●Do not wash the underside of the vehicle using a high pressure car washer.
Cleaning and protecting
the vehicle interior
Perform cleaning in a manner
appropriate to each compo-
nent and its material.
Protecting the vehicle inte-
rior

264
Owner's Manual_Europe_M52P63_en
6-3. Maintenance
request that a record of maintenance
be kept.
■Does your vehicle need repairs?
Be on the alert for changes in perfor- mance and sounds, and visual tip-offs
that indicate service is needed. Some important clues are:
●Engine misses (misfire), stumbling or pinging
●Appreciable loss of power
●Strange engine noises
●A fluid leak under the vehicle (How-ever, water dripping from the air con-
ditioning system after use is normal.)
●Change in exhaust sound (This may
indicate a dangerous carbon monox- ide leak. Drive with the windows open and have the exhaust system checked
immediately.)
●Flat-looking tires, excessive tire
squeal when cornering, uneven tire wear
●Vehicle pulls to one side when driven straight on a level road
●Strange noises related to suspension movement
●Loss of brake effectiveness, spongy feeling brake pedal or clutch pedal (vehicles with a manual transmission),
pedal almost touches the floor, vehicle pulls to one side when braking
●Engine coolant temperature continu-ally higher than normal ( P.81, 84)
If you notice any of these clues, take
your vehicle to any authorized Toyota
retailer or Toyota authorized repairer, or
any reliable repairer as soon as possi-
ble. Your vehicle may need adjustment
or repair.