warning light TOYOTA YARIS HATCHBACK 2018 Workshop Manual

3757-3. Do-it-yourself maintenance
7
Maintenance and care
■Initializing the tire pressure warning system (vehicles with a tire
pressure warning system)
Initialize the system with the tire infl ation pressure adjusted to the speci-
fied level.
■If the tread on snow tires wears down below 0.16 in. (4 mm)
The effectiveness of the tire s as snow tires is lost.
■If you press the tire pressure warning reset switch accidentally (vehi-
cles with a tire pressure warning system)
If initialization is performed, adjust the tire inflation pressure to the speci-
fied level and initialize the tire pressure warning system again.
■When the initialization of the tire pressure warning system has failed
(vehicles with a tire pressure warning system)
Initialization can be completed in a few minutes. However, in the following
cases, the settings ha s not been recorded and the system will not operate
properly. If repeated attempts to record tire inflation pressure settings are
unsuccessful, have the vehicle in spected by your Toyota dealer.
●When operating the tire pressure wa rning reset switch, the tire pressure
warning light does not blink 3 times.
●After driving for a certain period of time since the initialization has been
completed, the warning light comes on after blinks for 1 minute.
■Certification for the tire pressure warning system
FCC ID: PAXPMVC010
FCC ID: HYQ23AAD
NOTE:
This device complies with part 15 of the FCC Rules. Operation is subject
to the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
FCC WARNING:
Changes or modifications not expressl y approved by the party responsi-
ble for compliance could void the user ’s authority to operate the equip-
ment.

3767-3. Do-it-yourself maintenance
WARNING
■When inspecting or replacing tires
Observe the following precautions to prevent accidents.
Failure to do so may cause damage to parts of the drive train as well as
dangerous handling characteristics, which may lead to an accident
resulting in death or serious injury.
●Do not mix tires of different makes, models or tread patterns.
Also, do not mix tires of remarkably different treadwear.
●Do not use tire sizes other than those recommended by Toyota.
●Do not mix differently constructed tires (radial, bias-belted or bias-ply
tires).
●Do not mix summer, all season and snow tires.
●Do not use tires that have been used on another vehicle.
Do not use tires if you do not know how they were used previously.
●Do not tow if your vehicle has a compact spare tire installed.
■When initializing the tire pressure warning system (vehicles with a
tire pressure warning system)
Do not operate the tire pressure warning reset switch without first
adjusting the tire inflation pressure to the specified level. Otherwise, the
tire pressure warning light may not come on even if the tire inflation
pressure is low, or it may come on when the tire inflation pressure is
actually normal.

3947-3. Do-it-yourself maintenance
■After a fuse is replaced
●If the lights do not turn on even after the fuse has been replaced, a bulb may
need replacement. ( →P. 396)
● If the replaced fuse blows again, have the vehicle inspected by your Toyota
dealer.
■ If there is an overload in a circuit
The fuses are designed to blow, protecting the wiring harness from damage.
■ When replacing light bulbs
Toyota recommends that you use genuine Toyota products designed for this
vehicle. Because certain bulbs are connected to circuits designed to prevent
overload, non-genuine parts or parts not designed for this vehicle may be
unusable.
■ When reinstalling the cover (type C fuse box)
Reinstall the cover, and then hook the
rubber strip’s groove onto the cover.
WARNING
■To prevent system breakdowns and vehicle fire
Observe the following precautions.
Failure to do so may cause damage to the vehicle, and possibly a fire or
injury.
● Never use a fuse of a higher amperage rating than that indicated, or use\
any other object in place of a fuse.
● Always use a genuine Toyota fuse or equivalent.
Never replace a fuse with a wire, even as a temporary fix.
● Do not modify the fuses or fuse boxes.

4107-3. Do-it-yourself maintenance
WARNING
■Replacing light bulbs
● Turn off the lights. Do not attempt to replace the bulb immediately after
turning off the lights.
The bulbs become very hot and may cause burns.
● Do not touch the glass portion of the light bulb with bare hands. When it is
unavoidable to hold the glass portion, use and hold with a clean dry cloth
to avoid getting moisture and oils on the bulb.
Also, if the bulb is scratched or dropped, it may blow out or crack.
● Fully install light bulbs and any parts used to secure them. Failure to do so
may result in heat damage, fire, or water entering the headlight unit. This
may damage the headlights or cause condensation to build up on the lens.
■ To prevent damage or fire
● Make sure bulbs are fully seated and locked.
● Check the wattage of the bulb before installing to prevent heat damage.

411
8When trouble arises
8-1. Essential informationEmergency flashers .......... 412
If your vehicle has to be stopped in
an emergency ................. 413
8-2. Steps to take in an emergency
If your vehicle needs to be towed ......................... 415
If you think something is wrong .............................. 420
Fuel pump shut off system ............................ 421
If a warning light turns on or a warning buzzer
sounds ............................ 422
If you have a flat tire.......... 433
If the engine will not start ................................. 448
If the vehicle battery is discharged ...................... 450
If your vehicle overheats ... 453
If the vehicle becomes stuck ............................... 456

4208-2. Steps to take in an emergency
If you think something is wrong
●Fluid leaks under the vehicle
(Water dripping from the air conditioning after use is normal)
● Flat-looking tires or uneven tire wear
● High engine coolant temperature warning light flashes or comes on
● Low engine coolant temperature indicator comes on or does not
come on continuously
● Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the engine
● Engine misfire, stumbling or running roughly
● Appreciable loss of power
● Vehicle pulls heavily to one side when braking
● Vehicle pulls heavily to one side when driving on a level road
● Loss of brake effectiveness, spon gy feeling, pedal almost touches
the floor
If you notice any of the follow ing symptoms, your vehicle proba-
bly needs adjustment or repair. Contact your Toyota dealer as
soon as possible.
Visible symptoms
Audible symptoms
Operational symptoms

4228-2. Steps to take in an emergency
If a warning light turns on or a warning
buzzer sounds
Calmly perform the following actions if any of the warning lights
comes on or flashes. If a light comes on or flashes, but then
goes off, this does not necessarily indicate a malfunction in the
system. However, if this continues to occur, have the vehicle
inspected by your Toyota dealer.
Warning light and warning buzzer list
Warning lightWarning light/Details/Actions
(Except Canada)
(Canada)
Brake system warning light (warning buzzer)*1
• Low brake fluid
• Malfunction in the brake system
This light also comes on when the parking brake is not
released. If the light turns off after the parking brake is fully
released, the system is operating normally.
→ Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer. Continuing to drive the vehi-
cle may be dangerous.
Charging system warning light
Indicates a malfunction in the vehicle’s charging system.
→ Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer.
Low engine oil pressure warning light
Indicates that the engine oil pressure is too low.
→ Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer.
(Red warning light
flashes or comes on)
High engine coolant temperature warning light
Indicates that the engine is overheating.
As the coolant temperature rises, it changes from flashing
to steady on.
→ P. 453

4238-2. Steps to take in an emergency
8
When trouble arises
(Except Canada)(Canada)
Malfunction indicator lampIndicates a malfunction in:
• The electronic engine control system;
• The electronic throttle control system;
• The electronic automatic transmission control system.
→ Have the vehicle inspected by your Toyota dealer
immediately.
SRS warning light
Indicates a malfunction in:
• The SRS airbag system;
• The front passenger occupant classification system; or
• The seat belt pretensioner system.
→ Have the vehicle inspected by your Toyota dealer
immediately.
(Except Canada)
(Canada)
ABS warning lightIndicates a malfunction in:
• The ABS; or
• The brake assist system.
→ Have the vehicle inspected by your Toyota dealer
immediately.
Electric power steering system warning light
(warning buzzer)
Indicates a malfunction in the EPS (Electric Power Steer-
ing) system.
→ Have the vehicle inspected by your Toyota dealer
immediately.
Warning lightWarning light/Details/Actions

4248-2. Steps to take in an emergency
PCS warning light*2
When the warning light flashes (and a buzzer sounds):
Indicates a malfunction in the PCS (Pre-Collision system)
→ Have the vehicle inspected by your Toyota dealer
immediately.
When the warning light illuminates:
Indicates that the PCS (Pre-Collision system) is temporar-
ily unavailable, possibly due to either of the following:
• The part of the windshield around the front sensor being dirty, fogged up or covered with condensation, ice, stick-
ers, etc.
→ Clear the dirt, fog, condensat ion, ice, stickers, etc.
( →P. 175)
• Front sensor temperature being outside of its opera- tional range
→ Wait for a while until the area around the front sensor
has cooled down sufficiently.
Either the VSC (Vehicle Stability Control) system or PCS
(Pre-Collision system) is disabled or both are disabled.
→ To enable the PCS, enable both the VSC system and
PCS. ( →P. 180, 217)
Slip indicator
Indicates a malfunction in:
• The VSC system;
• The TRAC system; or
• The hill-start assist control system.
→ Have the vehicle inspected by your Toyota dealer
immediately.
(Yellow)
Automatic High Beam indicator*2
Indicates a malfunction in the Automatic High Beam sys-
tem.
→ Have the vehicle inspected by your Toyota dealer.
Warning lightWarning light/Details/Actions

4258-2. Steps to take in an emergency
8
When trouble arises
(Yellow)
Cruise control indicator*2
Indicates a malfunction in the cruise control system.
→ Have the vehicle inspected by your Toyota dealer
immediately.
(Yellow)
(Yellow)LDA indicator*2 and lane marker indicators*2
Indicates a malfunction in the LDA system.
→ Have the vehicle inspected by your Toyota dealer.
Open door warning light (warning buzzer)*3
Indicates that one or more of the doors is not fully closed.
→ Check that all the side doors and back door are
closed.
Low fuel level warning light
Indicates that remaining fuel is about 1.5 gal. (5.8 L,
1.3 Imp.gal.) or less.
→ Refuel the vehicle.
Driver’s and front passenger’ s seat belt reminder light
(warning buzzer)
*4
Warns the driver and front passenger to fasten their seat
belts
→ Fasten the seat belt.
If the passenger’s seat is occupied, the front passen-
ger’s seat belt also needs to be fastened to make the
warning light (warning buzzer) turn off.
Warning lightWarning light/Details/Actions