ECU TOYOTA GR YARIS 2021 Service Manual

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YARIS(GR) Owner's Manual_Europe_M52L09_en
4-1. Before driving
Driving
WARNING
■If you hear a squealing or scrap- ing noise (brake pad wear indica-
tors)
Have the brake pads checked and replaced by any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer as soon as possible.
Rotor damage may result if the pads are not replaced when needed.
Front brakes only: Moderate levels of brake pad and disc wear allow
enhanced front braking power. As a result, the discs may wear more quickly than conventional brake discs.
Therefore, when replacing the brake pads, Toyota recommends that you also have the thickness of the discs
measured. It is dangerous to drive the vehicle when the wear limits of the brake pads and/or those of the brake
discs are exceeded.
■When the vehicle is stopped
●Do not race the engine. If the vehicle is in any gear other than N, the vehicle may accelerate
suddenly and unexpectedly, caus- ing an accident.
●If the vehicle is stopped on an incline, in order to prevent acci-dents caused by the vehicle rolling
forward or backward, always depress the brake pedal and securely apply the parking brake as
needed.
●Avoid revving or racing the engine.
Running the engine at high speed while the vehicle is stopped may cause the exhaust system to over-
heat, which could result in a fire if combustible material is nearby.
■When the vehicle is parked
●Do not leave glasses, cigarette lighters, spray cans, or soft drink
cans in the vehicle when it is in the sun.Doing so may result in the follow-
ing:
• Gas may leak from a cigarette
lighter or spray can, and may lead to a fire.
• The temperature inside the vehicle may cause the plastic lenses and plastic material of glasses to
deform or crack.
• Soft drink cans may fracture, caus-
ing the contents to spray over the interior of the vehicle, and may also cause a short circuit in the vehicle’s
electrical components.
●Do not leave cigarette lighters in the
vehicle. If a cigarette lighter is in a place such as the glove box or on the floor, it may be lit accidentally
when luggage is loaded or the seat is adjusted, causing a fire.
●Do not attach adhesive discs to the windshield or windows. Do not place containers such as air fresh-
eners on the instrument panel or dashboard. Adhesive discs or con-tainers may act as lenses, causing
a fire in the vehicle.
●Do not leave a door or window
open if the curved glass is coated with a metallized film such as a sil-ver-colored one. Reflected sunlight
may cause the glass to act as a lens, causing a fire.
●Always apply the parking brake, stop the engine and lock the vehi-cle.
Do not leave the vehicle unat- tended while the engine is running.

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4-1. Before driving
WARNING
●Do not touch the exhaust pipes while the engine is running or
immediately after turning the engine off.Doing so may cause burns.
■When taking a nap in the vehicle
Always turn the engine off. Otherwise,
if you accidentally move the shift lever or depress the accelerator pedal, this could cause an accident or fire due to
engine overheating. Additionally, if the vehicle is parked in a poorly ventilated area, exhaust gases may collect and
enter the vehicle, leading to death or a serious health hazard.
■When braking
●When the brakes are wet, drive more cautiously.
Braking distance increases when the brakes are wet, and this may cause one side of the vehicle to
brake differently than the other side. Also, the parking brake may not securely hold the vehicle.
●If the brake booster device does not operate, do not follow other vehi-
cles closely and avoid hills or sharp turns that require braking.In this case, braking is still possible,
but the brake pedal should be depressed more firmly than usual. Also, the braking distance will
increase. Have your brakes fixed immediately.
●Do not pump the brake pedal if the engine stalls.Each push on the brake pedal uses
up the reserve for the power- assisted brakes.
●The brake system consists of 2 indi-vidual hydraulic systems; if one of the systems fails, the other will still
operate. In this case, the brake pedal should be depressed more firmly than usual and the braking
distance will increase. Have your brakes fixed immediately.
■If the vehicle becomes stuck
Do not spin the wheels excessively when a driven wheel is up in the air,
or the vehicle is stuck in sand, mud, etc. This may damage the driveline components or propel the vehicle for-
ward or backward, causing an acci- dent.
NOTICE
■When driving the vehicle
●Do not depress the accelerator and brake pedals at the same time during driving, as this may restrain
the engine output.
●Do not shift gears unless the clutch
pedal is fully depressed. After shift- ing, do not release the clutch pedal abruptly. Doing so may damage the
clutch, transmission and gears.
●Observe the following precautions.
Failure to do so may cause exces- sive premature wear or damage to the clutch, eventually making it diffi-
cult to accelerate and start off from a stop. Have the vehicle inspected by any authorized Toyota retailer or
Toyota authorized repairer, or any reliable repairer.
• Do not rest your foot on the clutch pedal or depress it any time other than when shifting.
Doing so may cause clutch trouble.
• Do not use any gear other than the
1st gear when starting off and mov- ing forward.Doing so may damage the clutch.

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4-1. Before driving
Cargo and luggage
Take notice of the following
information about storage pre-
cautions, cargo capacity and
load:
WARNING
■Things that must not be carried in the luggage compartment
The following things may cause a fire if loaded in the luggage compartment:
●Receptacles containing gasoline
●Aerosol cans
■Storage precautions
Observe the following precautions. Failure to do so may prevent the ped-
als from being depressed properly, may block the driver’s vision, or may result in items hitting the driver or
passengers, possibly causing an acci- dent.
●Stow cargo and luggage in the lug-
gage compartment whenever pos- sible.
●Do not stack cargo and luggage in the luggage compartment higher than the seatbacks.
●When you fold down the rear seats, long items should not be placed
directly behind the front seats.
●Do not place cargo or luggage in or
on the following locations.
• At the feet of the driver
• On the front passenger or rear seats (when stacking items)
• On the luggage cover
• On the instrument panel
• On the dashboard
●Secure all items in the occupant compartment.
●Never allow anyone to ride in the luggage compartment. It is not designed for passengers. They
should ride in their seats with their seat belts properly fastened.
■Load and distribution
●Do not overload your vehicle.
●Do not apply loads unevenly.Improper loading may cause deteri-oration of steering or braking con-
trol which may cause death or serious injury.
NOTICE
■Carbon film (if equipped)
Do not attach a roof carrier on the car- bon-film. It may damage the film sur-face.

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4-3. Operating the lights and wipers
1 Turns the front fog lights off
2 Turns the front fog lights on
3 Turns the front and rear fog
light on
Releasing the switch ring returns it to
.
Operating the switch ring again turns
only the rear fog light off.
■Fog lights can be used when
The headlights or the front fog lights are turned on.
Operating the lever operates
the wipers or washer as follows.
1 Rain-sensing windshield
wiper operation
2 Low speed windshield wiper
operation
3 High speed windshield
wiper operation
Fog light switch
The fog lights secure excellent
visibility in difficult driving
conditions, such as in rain and
fog.
Operating instructions
Windshield wipers and
washer
Operating the lever can use the
windshield wipers or the
washer.
NOTICE
■When the windshield is dry
Do not use the wipers, as they may
damage the windshield.
Operating the wiper lever

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4-4. Refueling
Driving
4-4.Refuelin g
zTurn the engine switch off and
ensure that both side doors and
windows are closed.
z Confirm the type of fuel.
■Fuel types
→ P. 3 5 9
■Fuel tank opening for unleaded gasoline
To help prevent incorrect fueling, your vehicle has a fuel tank opening that only accommodates the special nozzle on
unleaded fuel pumps.
Opening the fuel tank
cap
Perform the following steps to
open the fuel tank cap:
Before refueling the vehicle
WARNING
■When refueling the vehicle
Observe the following precautions
while refueling the vehicle. Failure to do so may result in death or serious injury.
●After exiting the vehicle and before opening the fuel door, touch an
unpainted metal surface to dis- charge any static electricity. It is important to discharge static elec-
tricity before refueling because sparks resulting from static electric-ity can cause fuel vapors to ignite
while refueling.
●Always hold the grips on the fuel tank cap and turn it slowly to remove it.
A whooshing sound may be heard when the fuel tank cap is loosened. Wait until the sound cannot be
heard before fully removing the cap. In hot weather, pressurized fuel may spray out the filler neck
and cause injury.
●Do not allow anyone that has not
discharged static electricity from their body to come close to an open fuel tank.
●Do not inhale vaporized fuel.Fuel contains substances that are
harmful if inhaled.
●Do not smoke while refueling the
vehicle. Doing so may cause the fuel to ignite and cause a fire.
●Do not return to the vehicle or touch any person or object that is stati-
cally charged. This may cause static electricity to build up, resulting in a possible igni-
tion hazard.
■When refueling
Observe the following precautions to prevent fuel overflowing from the fuel tank:
●Securely insert the fuel nozzle into the fuel filler neck.
●Stop filling the tank after the fuel nozzle automatically clicks off.
●Do not top off the fuel tank.

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4-5. Using the driving support systems
Driving
■The Blind Spot Monitor is opera-
tional when
The Blind Spot Monitor is operational
when all of the following conditions are
met:
●The Blind Spot Monitor is on.
●The shift lever is in a position other
than R.
●The vehicle speed is greater than
approximately 16 km/h (10 mph).
■The Blind Spot Monitor will detect a
vehicle when
The Blind Spot Monitor will detect a
vehicle present in the detection area in
the following situations:
●A vehicle in an adjacent lane over-
takes your vehicle.
●You overtake a vehicle in adjacent
lane slowly.
●Another vehicle enters the detection
area when it changes lanes.
■Conditions under which the system
will not detect a vehicle
The Blind Spot Monitor is not designed
to detect the following types of vehicles
and/or objects:
●Small motorcycles, bicycles, pedestri-
ans, etc.*
●Vehicles traveling in the opposite
direction
●Guardrails, walls, signs, parked vehi-
cles and similar stationary objects*
●Following vehicles that are in the
same lane*
●Vehicles traveling 2 lanes away from
your vehicle*
●Vehicles which are being overtaken
rapidly by your vehicle*
*
: Depending on the conditions, detec-
tion of a vehicle and/or object may
occur.
■Conditions under which the system
may not function correctly
●The Blind Spot Monitor may not detect
vehicles correctly in the following situ-
ations:
• When the sensor is misaligned due to
a strong impact to the sensor or its
surrounding area
• When mud, snow, ice, a sticker, etc.,
is covering the sensor or surrounding
area on the rear bumper
• When driving on a road surface that is
wet with standing water during bad
weather, such as heavy rain, snow, or
fog
• When multiple vehicles are approach-
ing with only a small gap between
each vehicle
• When the distance between your vehi-
cle and a following vehicle is short
• When there is a significant difference
in speed between your vehicle and
the vehicle that enters the detection
area
• When the difference in speed
between your vehicle and another
vehicle is changing
• When a vehicle enters a detection
area traveling at about the same
speed as your vehicle
• As your vehicle starts from a stop, a
vehicle remains in the detection area
• When driving up and down consecu-
tive steep inclines, such as hills, dips
in the road, etc.
• When driving on roads with sharp
bends, consecutive curves, or uneven
surfaces
• When vehicle lanes are wide, or when
driving on the edge of a lane, and the
vehicle in an adjacent lane is far away
from your vehicle
• When towing a trailer
• When an accessory (such as a bicycle
carrier) is installed to the rear of the
vehicle
• When there is a significant difference
in height between your vehicle and
the vehicle that enters the detection
area
• Immediately after the Blind Spot Moni-
tor is turned on

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4-5. Using the driving support systems
●Instances of the Blind Spot Monitor
unnecessarily detecting a vehicle
and/or object may increase in the fol-
lowing situations:
• When the sensor is misaligned due to
a strong impact to the sensor or its
surrounding area
• When the distance between your vehi-
cle and a guardrail, wall, etc., that
enters the detection area is short
• When driving up and down consecu-
tive steep inclines, such as hills, dips
in the road, etc.
• When vehicle lanes are narrow, or
when driving on the edge of a lane,
and a vehicle traveling in a lane other
than the adjacent lanes enters the
detection area
• When driving on roads with sharp
bends, consecutive curves, or uneven
surfaces
• When the tires are slipping or spinning
• When the distance between your vehi-
cle and a following vehicle is short
• When an accessory (such as a bicycle
carrier) is installed to the rear of the
vehicle
*: If equipped
■Types of sensors
Front corner sensors
Front center sensors
Rear corner sensors
Rear center sensors
■Display
When the sensors detect an object,
such as a wall, a graphic is shown
on the multi-information display
depending on the position and dis-
Toyota parking assist-
sensor
*
The distance from your vehicle
to objects, such as a wall,
when parallel parking or
maneuvering into a garage is
measured by the sensors and
communicated via the multi-
information display and a
buzzer. Always check the sur-
rounding area when using this
system.
System components

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6-4. Do-it-yourself maintenance
Maintenance and care
3Hold the hood open by inserting
the support rod into the slot.
WARNING
■Pre-driving check
Check that the hood is fully closed
and locked. If the hood is not locked properly, it may open while the vehicle is in
motion and cause an accident, which may result in death or serious injury.
■To prevent a injuries
The support rod may be hot after driv- ing the vehicle. Touching the hot sup-
port rod may lead to burns or other serious injuries.
■After installing the support rod into the slot
Make sure the rod supports the hood
securely preventing it from falling down onto your head or body.
NOTICE
■When closing the hood
Be sure to return the support rod to its
clip before closing the hood. Closing the hood with the support rod not clipped could cause the hood to bend.

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6-4. Do-it-yourself maintenance
Maintenance and care
zStop the vehicle on a hard, flat
surface.
z Set the parking brake.
z Shift the shift lever to R.
z Stop the engine.
z Turn on the emergency flashers.
( →P.306)
1 Chock* the tires.
Replacing the tire
When raising your vehicle with
a jack, position the jack cor-
rectly. Improper placement
may damage your vehicle or
cause injury.
Jack, wheel nut wrench and
wheel chocks can be pur-
chased at any authorized
Toyota retailer or Toyota autho-
rized repairer, or any reliable
repairer.
If necessary tire replacement
seems difficult to perform,
contact any authorized Toyota
retailer or Toyota authorized
repairer, or any reliable
repairer.
Before jacking up the vehi-
cle
WARNING
■Using the tire jack
Observe the following precautions. Improper use of the tire jack may cause the vehicle to suddenly fall off
the jack, leading to death or serious injury.
●Do not use the tire jack for any pur-pose other than replacing tires or installing and removing tire chains.
●Only use the tire jack that comes with this vehicle for replacing a tire.
Do not use it on other vehicles, and do not use other tire jacks for replacing tires on this vehicle.
●Always check that the tire jack is securely set to the jack point.
●Do not put any part of your body under the vehicle while it is sup-
ported by the jack.
●Do not operate the fuel cell system
or drive the vehicle while the vehi- cle is supported by the jack.
●Do not raise the vehicle while someone is inside.
●When raising the vehicle, do not put an object on or under the jack.
●Do not raise the vehicle to a height greater than that required to replace the tire.
●Use a jack stand if it is necessary to get under the vehicle.
●When lowering the vehicle, make sure that there is no-one near the
vehicle. If there are people nearby, warn them vocally before lowering.
Replacing a flat tire

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6-4. Do-it-yourself maintenance
3Lower the vehicle.
4 Firmly tighten each wheel nut
two or three times in the order
shown in the illustration.
Tightening torque: 103 N•m (10.5 kgf•m, 76 ft•lbf)
5 Stow the tire jack and all tools.
■After completing the tire change
The tire pressure warning system must be reset. ( →P.282)
Tire inflation pressure is specified
on the label on the driver’s side
door frame as shown.
Left-hand drive vehicles
Right-hand drive vehicles
WARNING
■After using the tools and jack
Before driving, make sure all the tools and jack are securely in place in their
storage location to reduce the possi- bility of personal injury during a colli-sion or sudden braking.
Tire inflation pressure
Make sure to maintain proper
tire inflation pressure. Tire
inflation pressure should be
checked at least once per
month. However, Toyota rec-
ommends that tire inflation
pressure be checked once
every two weeks. ( →P. 3 5 7 )
Tire-loading information
label