ECU TOYOTA YARIS 2018 Repair Manual

1923-4. Adjusting the steering wheel and mirrors
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■After adjusting the steering wheel
Make sure that the steering wheel is securely locked.
The horn may not sound if the steering wheel is not securely locked.
WARNING
■ Caution while driving
Do not adjust the steering wheel while driving.
Doing so may cause the driver to mishandle the vehicle and cause an acci-
dent, resulting in death or serious injury.
■ After adjusting the steering wheel
Make sure that the steering wheel is securely locked.
Otherwise, the steering wheel may move suddenly, possibly causing an
accident and resulting in death or serious injury.

2084-1. Before driving
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WARNING
■If you hear a squealing or scraping noise (brake pad wear indicators)
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.
It is dangerous to drive the vehicle w hen the wear limits of the brake pads
and/or those of the brake discs are exceeded.
■ When the vehicle is stopped
● Do not depress the accelerator pedal unnecessarily.
If the shift lever is in any position other than P or N, the vehicle may accel-
erate suddenly and unexpectedly, causing an accident.
● In order to prevent accidents due to the vehicle rolling away, always keep
depressing the brake pedal while stopped with the “READY” indicator is
illuminated, and apply the parking brake as necessary.
● If the vehicle is stopped on an incline, in order to prevent accidents 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 overheat, which could result in a fire if combustible
material is nearby.

2104-1. Before driving
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WARNING
■When taking a nap in the vehicle
Always turn the hybrid system off. Otherwise, if you accidentally move the
shift lever or depress the accelerator pedal, this could cause an accident or
fire due to hybrid system 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 electronically controlled brake system does not operate, do not fol-
low other vehicles closely and avoid hills or sharp turns that require brak-
ing.
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.
● The brake system consists of 2 or more individual hydraulic systems; if
one of the systems fails, the other(s) 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.

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4
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.
● 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.

2254-2. Driving procedures
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Driving
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■Auto power off function
If the vehicle is left in ACCESSORY mode for more than 20 minutes or ON
mode (the hybrid system is not operating) for more than an hour with the shift
lever in P, the power switch will automatically turn off. However, this function
cannot entirely prevent 12-volt battery discharge. Do not leave the vehicle
with the power switch in ACCESSORY or ON mode for long periods of time
when the hybrid system is not operating.
■ Sounds and vibrations specific to a hybrid vehicle
 P. 8 9
■ Electronic key battery depletion
 P. 477
■ When the ambient temperature is low, such as during winter driving con-
ditions
When starting the hybrid system, the flashing time of the “READY” indicator
may be long. Leave the vehicle as it is until the “READY” indicator is steady
on, as steady means the vehicle is able to move.
■ Conditions affecting operation
 P. 168
■ Notes for the entry function
 P. 169
■ If the hybrid system does not start
● The immobilizer system may not have been deactivated. (P. 9 6 )
Contact any authorized Toyota retailer or Toyota authorized repairer, or any
reliable repairer.
● Check that the shift lever is securely set in P. The hybrid system may not
start if the shift lever is displaced out of P.
Vehicles with monochrome display
The smart entry & start system indicator light (green) will flash quickly.
Vehicles with color display
“Shift to P position to start.” will be displayed on the multi-information dis-
play.

2444-3. Operating the lights and wipers
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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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2534-4. Refueling
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Driving
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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 stat ic electricity. It is important to
discharge static electricity before re fueling 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.
■ When replacing the fuel tank cap
Do not use anything but a genuine Toyota fuel tank cap designed for your
vehicle. Doing so may cause a fire or other incident which may result in
death or serious injury.

3615-6. Using Bluetooth® devices
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Audio system
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Registering a Bluetooth® device
Press the tune/scroll knob and select “Bluetooth*” using the knob.
Press the knob and select “Pairing” using the knob.
A passkey will be displayed.
SSP (Secure Simple Pairing) incompatible Bluetooth® devices:
Input the passkey into the device.
SSP (Secure Simple Pairing) compatible Bluetooth® devices:
Select “Yes” to register the device. Depending on the type of
device, it may register automatically.
If a Bluetooth® device has both music player and cellular phone func-
tions, both functions will be registered at the same time. When delet-
ing the device, both functions will be deleted at the same time.
If the off-hook switch is pressed and the “Phone” mode is entered
when no phones have been registered, the registration screen will be
automatically displayed.
*: Bluetooth is a registered trademark of Bluetooth SIG, Inc.
: If equipped
Before using the Bluetooth® audio/phone, it is necessary to reg-
ister a Bluetooth® device in the system. You can register up to 5
Bluetooth® devices.
How to register a Bluetooth® device
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4347-3. Do-it-yourself maintenance
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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.
■ After installing the support rod into the slot
Make sure the rod supports the hood securely from falling down on to 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.

4887-3. Do-it-yourself maintenance
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■Headlights
Turn the bulb base counter-
clockwise.
Pull the bulb out while press-
ing the lock release of the
connector.
Replace the light bulb, plug
the connector, and then
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.
Replacing light bulbs
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