2016 TOYOTA iM Owners Manual (in English)

2256-3. Do-it-yourself maintenance
6
Maintenance and care
Scion iM_U (12J49U)n
Situations in which the tire pressure warning system may not oper-
ate properly
lIn the following cases, the tire pr
essure warning system may not operate
properly.
• If non-genuine Scion wheels are used.
• A tire has been replaced with a tire that is not an OE (Original Equip- ment) tire.
• A tire has been replaced with a tire that is not of the specified size.
• Tire chains etc. are equipped.
• An auxiliary-supported run- flat tire is equipped.
• If a window tint that affects the radio wave signals is installed.
• If there is a lot of snow or ice on the vehicle, particularly around the
wheels or wheel housings.
• If the tire inflation pressure is extremely higher than the specified level.
• If tires not equipped with tire pressure warning valves and transmit-
ters are used.
• If the ID code on the tire pressure warning valves and transmitters is not registered in the tire pressure warning computer.
lPerformance may be affected in the following situations.
• Near a TV tower, electric power plant, gas station, radio station, largedisplay, airport or other facility that generates strong radio waves or
electrical noise.
• When carrying a portable radio, cellular phone, cordless phone or other wireless communication device.
lWhen the vehicle is parked, the time taken for the warning to start or go
off could be extended.
lWhen tire inflation pressure declines rapidly for example when a tire has
burst, the warning may not function.

2266-3. Do-it-yourself maintenance
Scion iM_U (12J49U)n
The initialization operation
lMake sure to carry out in
itialization after adjusting the tire inflation pres-
sure.
Also, make sure the tires are cold be fore carrying out initialization or tire
inflation pressure adjustment.
lIf you have accidentally turned the engine switch off during initialization,
it is not necessary to press the reset switch again as initialization will
restart automatically when the engine switch to the “ON” position for the
next time.
lIf you accidentally press the reset s witch when initialization is not neces-
sary, adjust the tire inflation pressu re to the specified level when the
tires are cold, and conduct initialization again.
nWarning performance of the ti re pressure warning system
The warning of the tire pressure warning system will change in accor-
dance with driving conditions. For th is reason, the system may give a
warning even if the tire pressure does not reach a low enough level, or if
the pressure is higher than the pressure that was adjusted to when the
system was initialized.
nWhen initialization of the tire pr essure warning system has failed
Initialization can be completed in a few minutes. However, in the following
cases, the settings have not been recorded and the system will not oper-
ate properly. If repeated attempts to record tire inflation pressure settings
are unsuccessful, have the vehicl e inspected by your Scion dealer.
lWhen operating the tire pressure wa rning reset switch, the tire pressure
warning light does not blink 3 times.
lAfter driving for a certain period of time since the initialization has been
completed, the warning light comes on after blinking for 1 minute.

2276-3. Do-it-yourself maintenance
6
Maintenance and care
Scion iM_U (12J49U)n
Tire pressure warning system certification
For the U.S.A.
FCC ID: PAXPMVC010
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 expressly approved by the party responsi-
ble for compliance could void the user ’s authority to operate the equip-
ment.
For Canada
NOTE:
Operation is subject to the following two conditions: (1) this device may
not cause interference, and (2) this device must accept any interference,
including interference that may cause undesired operation of the device.
L’utilisation de ce dispositif est au torisée seulement aux deux conditions
suivantes : (1) il ne doit pas produire de brouillage, et (2) l’utilisateur du
dispositif doit être pr êt à accepter tout brouillage radioé lectrique reçu,
même si ce brouillage est susceptible de comp romettre le fonctionne-
ment du dispositif.

2286-3. Do-it-yourself maintenance
Scion iM_U (12J49U)
WARNING
nWhen 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.
lDo not mix tires of different makes, models or tread patterns.
Also, do not mix tires of remarkably different treadwear.
lDo not use tire sizes other than those recommended by Scion.
lDo not mix differently constructed ti res (radial, bias-belted or bias-ply
tires).
lDo not mix summer, all season and snow tires.
lDo not use tires that have been used on another vehicle.
Do not use tires if you do not know how they were used previously.
lDo not tow if your vehicle has a compact spare tire installed.
nWhen initializing the 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.

2296-3. Do-it-yourself maintenance
6
Maintenance and care
Scion iM_U (12J49U)
NOTICE
nRepairing or replacing tires, wheels, tire pressure warning valves,
transmitters and tire valve caps
lWhen removing or fitting the wheels, tires or the tire pressure warning
valves and transmitters, contact your Scion dealer as the tire pressure
warning valves and transmitters may be damaged if not handled cor-
rectly.
lMake sure to install the tire valve caps. If the tire valve caps are not
installed, water could enter the tire pressure warning valves and the
tire pressure warning valves could be bound.
lWhen replacing tire valve caps, do not use tire valve caps other than
those specified. The cap may become stuck.
nTo avoid damage to the tire pressure warning valves and transmit-
ters
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 Scion 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. 221)
nDriving 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.
nLow profile 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:
lBe sure to use proper tire inflation pressure. If tires are under-inflated,
they may be damaged more severely.
lAvoid potholes, uneven pavement, curbs and other road hazards. Fail-
ure to do so may lead to severe tire and wheel damage.
nIf tire inflation pressure of e ach tire becomes low while driving
Do not continue driving, or your tires and/or wheels may be ruined.

2306-3. Do-it-yourself maintenance
Scion iM_U (12J49U)
The recommended cold tire infla-
tion pressure and tire size are dis-
played on the tire and loading
information label. (P. 301)
Tire inflation pressure
Tire inflation pressure

2316-3. Do-it-yourself maintenance
6
Maintenance and care
Scion iM_U (12J49U)
Tire valve
Tire pressure gauge
Remove the tire valve cap.
Press the tip of the tire pressure gauge onto the tire valve.
Read the pressure usi ng the gauge gradations.
If the tire inflation pressure is not at the recommended level, adjust
the pressure.
If you add too much air, press the center of the valve to deflate.
After completing the tire inflation pressure measurement and
adjustment, apply soapy water to the valve and check for leakage.
Put the tire valve cap back on.
nTire inflation pressure check interval
You should check tire inflation pressure every two weeks, or at least once
a month.
Do not forget to check the spare.
nEffects of incorrect tire inflation pressure
Driving with incorrect tire inflation pressure may result in the following:
lReduced fuel economy
lReduced driving comfort and poor handling
lReduced tire life due to wear
lReduced safety
lDamage to the drivetrain
If a tire needs frequent inflating, have it checked by your Scion dealer.
Inspection and adjustment procedure
1
2
1
2
3
4
5
6

2326-3. Do-it-yourself maintenance
Scion iM_U (12J49U)n
Instructions for checking tire inflation pressure
When checking tire inflation pressure, observe the following:
lCheck only when the tires are cold.
If your vehicle has been parked for at least 3 hours or has not been
driven for more than 1 mile or 1.5 km, you will get an accurate cold tire
inflation pressure reading.
lAlways use a tire pressure gauge.
It is difficult to judge if a tire is properly inflated based only on its appear-
ance.
lIt is normal for the tire inflation pressure to be higher after driving as
heat is generated in the tire. Do not
reduce tire inflation pressure after
driving.
lNever exceed the vehicle capacity weight.
Passengers and luggage weight should be placed so that the vehicle is
balanced.
WARNING
nProper inflation is critical to save tire performance
Keep your tires properly inflated.
If the tires are not properly inflated, the following conditions may occur
which could lead to an accident resulting in death or serious injury:
lExcessive wear
lUneven wear
lPoor handling
lPossibility of blowouts result ing from overheated tires
lAir leaking from between tire and wheel
lWheel deformation and/or tire damage
lGreater possibility of tire damage while driving (due to road hazards,
expansion joints, sharp edges in the road, etc.)
NOTICE
nWhen inspecting and adjusting tire inflation pressure
Be sure to put the tire valve caps back on.
If a valve cap is not installed, dirt or moisture may get into the valve and
cause an air leak, resulting in decreased tire inflation pressure.