warning TOYOTA YARIS HATCHBACK 2012 Owner's Manual

257
4-3. Do-it-yourself maintenance
4
Maintenance and care
■Tire types
●Summer tires
Summer tires are high-speed performance tires best suited to highway
driving under dry conditions. Since summer tires do not have the same
traction performance as snow tire
s, summer tires are inadequate for
driving on snow-covered or icy roads. For driving on snow-covered
roads or icy roads, the use of snow tires is recommended. When
installing snow tires, be sure to replace all four tires.
●All season tires
All season tires are designed to provide better traction in snow and to
be adequate for driving in most winter conditions as well as for use
year-round. All season tires, however, do not have adequate traction
performance compared with snow tires in heavy or loose snow. Also,
all season tires fall short in acceleration and handling performance
compared with summer tires in highway driving.
●Snow tires
For driving on snow-covered roads or icy roads, we recommend using
snow tires. If you need snow tires, select tires of the same size, con-
struction and load capacity as the or iginally installed tires. Since your
vehicle has radial tires as original equipment, make sure your snow
tires also have radial construction. Do not install studded tires without
first checking local regulations for possible restrictions. Snow tires
should be installed on all wheels. ( →P. 172)
■Initializing the tire pressure warn ing 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 tires as snow tires is lost.
■If you press the tire pressure warning reset switch accidentally
(vehicles with a tire pressure warning system)
If initialization is performed, adjust t he tire inflation pressure to the speci-
fied level and initialize the tire pressure warning system again.

258 4-3. Do-it-yourself maintenance
■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 follow-
ing cases, the settings has not be en recorded and the system will not
operate properly. If repeated attempts to record tire inflation pressure
settings are unsuccessful, have the vehicle inspected by your Toyota
dealer.
●When operating the tire pressure warning reset switch, the tire pres-
sure 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.
■Tire pressure warning system certification
FCC ID: PAXPMVC010
FCC ID: HYQ23AAD
For vehicles sold in U.S.A.
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 expre ssly approved by the party responsi-
ble for compliance could void the user’s authority to operate the equip-
ment.

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4-3. Do-it-yourself maintenance
4
Maintenance and care
CAUTION
■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 ma kes, 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 ti res (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 wa rning reset switch without first adjust-
ing the tire inflation pr essure 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 ti re inflation pressure is actually nor-
mal.

260 4-3. Do-it-yourself maintenance
NOTICE
■Repairing or replacing tires, wheels, tire pressure warning valves,
transmitters and tire valve caps (vehicles with a tire pressure warn-
ing system)
●When removing or fitting the wheels, tires or the tire pressure warning
valves and transmitters, contact your Toyota dealer as the tire pres-
sure warning valves and transmitters may be damaged if not handled
correctly.
●When replacing tire valve caps, do not use tire valve caps other than
those specified. The cap may become stuck.
■To avoid damage to the tire pressure warning valves and transmit-
ters (vehicles with a tire pressure warning system)
When a tire is repaired with liquid sealants, the tire pressure warning
valve and transmitter may not operate properly. If a liquid sealant is
used, contact your Toyota dealer or other qualified service shop as soon
as possible. Make sure to replace the tire pressure warning valve and
transmitter when replacing the tire. ( →P. 254)
■Driving on rough roads
Take particular care when driving on roads with loose surfaces or pot-
holes.
These conditions may cause losses in tire inflation pressure, reducing
the cushioning ability of the tires. In addition, driving on rough roads may
cause damage to the tires themselves, as well as the vehicle’s wheels
and body.
■Low profile tires (vehicle s with P195/50R16 tires)
Low profile tires may cause greater damage than usual to the tire wheel
when sustaining impact from the road surface. Therefore, pay attention
to the following:
●Be sure to use proper tire inflation pressure. If tires are under-inflated,
they may be damaged more severely.
●Avoid potholes, uneven pavement, curbs and other road hazards. Fail-
ure to do so may lead to severe tire and wheel damage.
■If tire inflation pressure of each tire becomes low while driving
Do not continue driving, or your tires and/or wheels may be ruined.

266 4-3. Do-it-yourself maintenance
■When replacing wheels (vehicles with a tire pressure warning sys-
tem)
The wheels of your vehicle, except for the compact spare tire, are
equipped with tire pressure warning valves and transmitters that allow
the tire pressure warning system to provide advance warning in the
event of a loss in tire inflation pressure. Whenever wheels are replaced,
tire pressure warning valves and transmitters must be installed.
( → P. 254)
CAUTION
■When replacing wheels
●Do not use wheels that are a different size from those recommended in
the Owner’s Manual, as this may resu lt in a loss of handling control.
●Never use an inner tube in a leaking wheel which is designed for a
tubeless tire. Doing so may result in an accident, causing death or seri-
ous injury.
■When installing the wheel nuts
●Never use oil or grease on the wheel bolts or wheel nuts.
Oil and grease may cause the wheel nuts to be excessively tightened,
leading to bolt or disc wheel damage. In addition, the oil or grease can
cause the wheel nuts to loosen and the wheel may fall off, causing an
accident and resulting in death or serious injury. Remove any oil or
grease from the wheel bolts or wheel nuts.
●Be sure to install the wheel nuts with
the tapered end faci ng inward. Install-
ing the nuts with the tapered end fac-
ing outward can cause wheel to
break and eventually cause a wheel
to come off while driving, which could
lead to an accident resulting in death
or serious injury.Tapered
portion

267
4-3. Do-it-yourself maintenance
4
Maintenance and care
NOTICE
■Replacing tire pressure warning valves and transmitters (vehicles
with a tire pressure warning system)
●Because tire repair or replacement may affect the tire pressure warn-
ing valves and transmitters, make su
re to have tires serviced by your
Toyota dealer or other qualified service shop. In addition, make sure to
purchase your tire pressure warning valves and transmitters at your
Toyota dealer.
●Ensure that only genuine Toyota wheels are used on your vehicle.
Tire pressure warning valves and transmitters may not work properly
with non-genuine wheels.

280 4-3. Do-it-yourself maintenance
27 ETCS10 AMultiport fuel injection system/
sequential multiport fuel injection
system
28 HAZ 15 ATurn signal lights, emergency
flashers
29 AM2 7.5 AMultiport fuel injection system/
sequential multiport fuel injection
system, starting system
30 ECU-B NO.2 5 A Gauges and meters, wireless
remote control system, tire pres-
sure warning system, front passen-
ger occupant classification system
31 ALT-S 7.5 A Charging system
32 R/I 50 AEFI MAIN, EFI NO.2, EFI NO.3,
IG2, IGN, MET, HORN
33 SPARE 20 A Spare fuse
34 SPARE 30 A Spare fuse
FuseAmpereCircuit

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4-3. Do-it-yourself maintenance
4
Maintenance and care
Under the driver’s side instrument panel
FuseAmpereCircuit
1 TAIL NO.2 10 A Parking lights, tail lights, license
plate lights, side marker lights
2 PANEL 5 A Gauges and meters, instrument
panel lights, switch illumination
3 DOOR R/R 20 A Power windows
4 DOOR P 20 A Power windows
5 ECU-IG NO.1 5 A Electric cooling fan, rear window
defogger, vehicle stability control
system, electric power steering
system, main body ECU, wireless
remote control system, tire pres-
sure warning system
6 ECU-IG NO.2 5 A Vehicle stability control system
7 A/C 7.5 A Air conditioning system, rear win-
dow defogger, outside rear view
mirror defoggers
8 GAUGE 10 A Back-up lights, shift lock control
system, audio system, charging
system, multiport fuel injection sys-
tem/sequential multiport fuel injec-
tion system
9 WASHER 15 A Windshield washer
10 WIPER 20 A Windshield wiper
11 WIPER RR 15 A Rear window wiper

5
When trouble arises
303
5-1. Essential information
If you think something is wrong
If you notice any of the following symptoms, your vehicle probably
needs adjustment or repair. Contact your Toyota dealer as soon as
possible.
■ Visible symptoms
●Fluid leaks under the vehicle
(Water dripping from the air cond itioning after use is normal.)
● Flat-looking tires or uneven tire wear
● High engine coolant temperatur e warning light flashes or
comes on
● Low engine coolant temperature indicator comes on or does
not come on continuously
■ Audible symptoms
●Changes in exhaust sound
● Excessive tire squeal when cornering
● Strange noises related to the suspension system
● Pinging or other noises related to the engine
■ Operational symptoms
●Engine missing, 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, s pongy feeling, pedal almost
touches the floor

5
When trouble arises
305
5-2. Steps to take in an emergency
If a war ning light turns on or a war ning buzzer sounds...
Stop the vehicle immediately. Continuing to drive the vehicle
may be dangerous.The following warnings indicate a possible problem in the brake sys-
tem. Immediately stop the vehicle in a safe place and contact your
Toyota dealer.
*: Parking brake engaged warning buzzer: The buzzer sounds to indicate that the parking brake is still engaged (with
the vehicle having reached a speed of 3 mph [5 km/h]).
Warning lightWarning light/Details
(except Canada) (Canada) Brake system warning light (warning buzzer)*
• 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 nor-
mally.
Calmly perform the following actio ns 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 indi cate a malfunction in the system.
However, if this continues to o ccur, have the vehicle inspected by
your Toyota dealer.