ECU TOYOTA YARIS 2017 Workshop Manual

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4-1. Before driving
Driving
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Cargo and luggage
Take notice of the following information about storage precau-
tions, 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 t he pedals from being depressed properly,
may block the driver’s vision, or may re sult in items hitting the driver or pas-
sengers, possibly causing an accident.
● Stow cargo and luggage in the luggage compartment whenever possible.
● Do not stack anything in the luggage compartment higher than the seat-
backs.
● 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.
● Vehicles with rear seats: When you fold down the rear seats, long items
should not be place directly behind the front seats.
● 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 prop-
erly fastened. Otherwise, they are much more likely to suffer death or seri-
ous bodily injury, in the event of sudden braking, sudden swerving or an
accident.

1784-1. Before driving
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■Tire information
● Increase the tire inflation pressure to 20.0 kPa (0.2 kgf/cm2 or bar, 3 psi)
greater than the recommended value when towing. ( P. 518)
● Increase the air pressure of the trailer tires in accordance with the total
trailer weight and according to the values recommended by the manufac-
turer of your trailer.
■ Tr a i l e r l i g h ts
Check that the turn signal lights and stoplights are operating correctly every
time you hitch up the trailer. Direct ly wiring up to your vehicle may damage
the electrical system and stop the lights from functioning correctly.
■ Break-in schedule
Toyota recommends that vehicles fitted with new power train components
should not be used for towing trailers for the first 800 km (500 miles).
■ Safety checks before towing
● Check that the maximum load limit for the towing hitch/bracket and hitch ball
is not exceeded. Bear in mind that the coupling weight of the trailer will add
to the load exerted on the vehicle. Also make sure that the total load exerted
on the vehicle is within the range of the weight limits. ( P. 174)
● Ensure that the trailer load is secure.
● Supplementary outside rear view mirrors should be added to the vehicle if
the traffic behind cannot be clearly seen with standard mirrors. Adjust the
extending arms of these mirrors on both sides of the vehicle so that they
always provide maximum visibility of the road behind.
■ Maintenance
● Maintenance must be performed more frequently when using the vehicle for
towing due to the greater weight burden placed on the vehicle compared to
normal driving.
● Retighten all bolts securing the hitching ball and bracket after towing for
approximately 1000 km (600 miles).
NOTICE
■ When the rear bumper strengthening material is aluminum
Ensure the steel bracket part does not come directly in contact with that
area.
When steel and aluminum come into contact, there is a reaction similar to
corrosion, which will weaken the section concerned and may result in dam-
age. Apply a rust inhibitor to parts that will come in contact when attaching a
steel bracket.

1794-1. Before driving
4
Driving
YARIS_F_OM_Europe_OM52J20E
Your vehicle will handle differently when towing a trailer. In order to
avoid accident, death or serious injury, keep the following in mind
when towing:
■Checking connections between trailer and lights
Stop the vehicle and check the operation of the connection
between the trailer and lights after driving for a brief period as well
as before starting off.
■Practicing driving with a coupled trailer
● Get the feel for turning, stopping and reversing with the trailer
coupled by practicing in an area with no or light traffic.
● When reversing with a coupled trailer, hold the section of the
steering wheel nearest to you and rotate clockwise to turn the
trailer left or counterclockwise to turn it right. Always rotate a little
at a time to prevent steering error. Have someone guide you
when reversing to lessen the risk of an accident.
■Increasing vehicle-to-vehicle distance
At a speed of 10 km/h (6 mph), the distance to the vehicle running
ahead of you should be equivalent to or greater than the combined
length of your vehicle and trailer. Avoid sudden braking that may
cause skidding. Otherwise, the vehicle may spin out of control. This
is especially true when driving on wet or slippery road surfaces.
■Sudden acceleration/steering input/cornering
Executing sharp turns when towing may result in the trailer colliding
with your vehicle. Decelerate well in advance when approaching
turns and take them slowly and carefully to avoid sudden braking.
■Important points regarding turning
The wheels of the trailer will travel closer to the inside of the curve
than the wheels of the vehicle. To make allowance for this, take the
turns wider than you would normally do.
Guidance

1884-2. Driving procedures
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■ If the engine does not start
● The engine immobilizer system may not have been deactivated. (P. 76)
Contact any authorized Toyota dealer or repairer, or another duly qualified
and equipped professional.
■ Steering lock
After turning the engine switch off and opening and closing the doors, the
steering wheel will be locked due to the steering lock function. Operating the
engine switch again automatically cancels the steering lock.
■ When the steering lock cannot be released
Press the engine switch while turning the steering wheel left and right.
■ Steering lock motor overheating prevention
To prevent the steering lock motor from overheating, the motor may be sus-
pended if the engine is turned on and off repeatedly in a short period of time.
In this case, refrain from operating the engine. After about 10 seconds, the
steering lock motor will resume functioning.
■ If the system is malfunctioning
 P. 442
■ If the electronic key battery is depleted
 P. 402
■ Operation of the engine switch
If the switch is not pressed shortly and firmly, the engine switch mode may
not change or the engine may not start.
■ If the smart entry & start system has been deactivated in a customized
setting
 P. 525
● On vehicles with a Multidrive, check that
the shift lever is securely set in P. The
engine may not start if the shift lever is
displaced out of P. The smart entry &
start system indicator (green) will flash
quickly.
The smart entry & start system indicator
(green) will flash quickly.
Vehicles with a Multidrive
Check that the shift lever is set in P.
Press the engine switch while turning the
steering wheel left and right.
Vehicles with a manual transmission

209
4
4-3. Operating the lights and wipers
Driving
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Fog light switch
■Rear fog light switch
Turns the rear fog lights off
Turns the rear fog lights on
Releasing the switch ring
returns it to .
Operating the switch ring
again turns the lights off.
The fog lights secure excellent visibility in difficult driving con-
ditions, such as in rain and fog.
Operation instructions
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2184-4. Refueling
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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 discharge any static electricity. It is important to
discharge static electricity before refueling because sparks resulting from
static electricity 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 statically
charged.
This may cause static electricity to build up, resulting in a possible ignition
hazard.
■ When refueling
Observe the following precautions to pr event 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.
NOTICE
■Refueling
Do not spill fuel during refueling.
Doing so may damage the vehicle, such as causing the emission control
system to operate abnormally or damaging fuel system components or the
vehicle’s painted surface.

4147-3. Do-it-yourself maintenance
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Set the new light bulb.
Align the 3 tabs on the light bulb
with the mounting and insert.
Install the bulb retaining
spring.
Install the rubber cover.
Ensure the rubber cover is
securely attached.
Fit the rubber cover outer
circumference in firmly.
Fit the rubber cover
around the light bulb in
until the light bulb plug can
be seen.
Install the connector.
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4157-3. Do-it-yourself maintenance
7
Maintenance and care
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Projector type
Turn the bulb base counter-
clockwise.
Pull the bulb out while press-
ing the lock release of the
connector.
Replace the light bulb, and
install the bulb base.
Align the 3 tabs on the light bulb
with the mounting and insert.
Turn and secure the bulb
base.
Shake the bulb base gently to
check that it is not loose, turn
the headlights on once and visu-
ally confirm that no light is leak-
ing through the mounting.
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4177-3. Do-it-yourself maintenance
7
Maintenance and care
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Turn the bulb base counter-
clockwise.
Set the new light bulb.
Align the 3 tabs on the light bulb
with the mounting, and insert.
Turn and secure the bulb.
Install the connector.
Shake the bulb base gently to
check that it is not loose, turn
the front fog light, on once and
visually confirm that no light is
leaking through the mounting.
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4217-3. Do-it-yourself maintenance
7
Maintenance and care
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After installing the new bulb,
secure the bulb base to the
mirror body.
Align the tabs, and secure
the mirror by pushing in each
diagonally-opposite pair of
tabs in order.
Make sure to insert the tabs in
order as shown in the illustra-
tion, and push them in until a
click is heard.
If you do not hear the click, do
not force the tabs in. Instead,
remove the mirror and check
that the tabs are aligned.
■Stop/tail lights (bulb type), and rear turn signal lights
Open the back door and
remove the cover.
To prevent damaging the vehi-
cle, wrap the screwdriver with a
tape.
Turn the bulb base counter-
clockwise.
Stop/tail light
Rear turn signal light
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