Scion iQ. Service Manual - part 14

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CAUTION

■

Proper inflation is critical to save tire performance

Keep your tires properly inflated. Otherwise, the following conditions
may occur and result in an accident causing death or serious injury.

●

Excessive wear

●

Uneven wear

●

Poor handling

●

Possibility of blowouts resulting from overheated tires

●

Poor sealing of the tire bead

●

Wheel deformation and/or tire separation

●

A greater possibility of tire damage from road hazards

NOTICE

■

When inspecting and adjusting tire inflation pressure

Be sure to reinstall the tire valve caps. 
Without the valve caps, dirt or moisture could get into the valve and
cause air leakage, which could result in an accident. If the caps have
been lost, replace them as soon as possible.

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Wheels

■

When replacing wheels

The wheels of your Scion 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. When-
ever wheels are replaced, tire pressure warning valves and transmitters
must be installed. (

P. 223)

If a wheel is bent, cracked or heavily corroded, it should be

replaced.

Otherwise, the tire may separate from the wheel or cause loss of

handling control.

■

Wheel selection

When replacing wheels, care should be taken to ensure that
they are equivalent to those removed in load capacity, diameter,
rim width, and inset

*

.

Replacement wheels are available at your Scion dealer.

*

: Conventionally referred to as “offset”.

Scion does not recommend using the following:

● Wheels of different sizes or types
● Used wheels
● Bent wheels that have been straightened

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CAUTION

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When replacing wheels

●

Do not use wheels that are a different size from those recommended in
the Owner’s Manual, as this may result in 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.

●

Be sure to install the wheel nuts with the tapered end facing inward. 
(

P. 209)

NOTICE

■

Replacing tire pressure warning valves and transmitters

●

Because tire repair or replacement may affect the tire pressure warn-
ing valves and transmitters, make sure to have tires serviced by your
Scion dealer or other qualified service shop. In addition, make sure to
purchase your tire pressure warning valves and transmitters at your
Scion dealer.

●

Ensure that only genuine Scion wheels are used on your vehicle. 
Tire pressure warning valves and transmitters may not work properly
with non-genuine wheels.

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Air conditioning filter

The air conditioning filter must be cleaned or changed regularly to

maintain air conditioning efficiency.

■

Removal method

Turn the engine switch to the LOCK position.

Remove the filter cover.

Remove the air conditioning
filter from between the knee
airbag support and dash panel
insulator.

When removing the air condi-
tioning filter, make sure that
dust or dirt does not enter the
air conditioning system.

UP
E

Knee
airbag
support

Dash
panel
insulator

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Cleaning method

If the filter is dirty, clean by blowing compressed air through the
filter as shown in the illustration.

Type A

Hold the air gun 2 in. (5 cm)
from the filter and blow for
approximately 2 minutes at 72
psi (500 kPa, 5.0 kgf/cm

2

 or

bar).

Type B

Hold the air gun 2 in. (5 cm)
from the filter and blow for
approximately 2 minutes at 72
psi (500 kPa, 5.0 kgf/cm

2

 or

bar).

If it is not available, have the filter cleaned by your Scion dealer.

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Restoration method

Type A

The

 “UP” marks shown on

the filter should be pointing up.

■

Replacement method

Replace the air conditioning filter with a new one.

Type B

The

 “UP” marks shown on

the filter should be pointing up.

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Checking interval

Inspect, clean and replace the air conditioning filter according to the mainte-
nance schedule. In dusty areas or areas with heavy traffic flow, more fre-
quent cleaning or early replacement may be required. (For scheduled
maintenance information, please refer to the “Scheduled Maintenance
Guide” or “Owner’s Manual Supplement”.)

■

If air flow from the vents decreases dramatically

The filter may be clogged. 

●

Type A: Check the filter and clean if necessary.

●

Type B: Check the filter and replace if necessary.

NOTICE

■

To prevent damage to the system

●

When using the air conditioning system, make sure that a filter is always
installed.

●

Type B: When cleaning the filter, do not clean the filter with water.

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4-3. Do-it-yourself maintenance

Key battery

Replace the battery with a new one if it is discharged.

■

You will need the following items:
● Flathead screwdriver (To prevent damage to the key, cover

the tip of the screwdriver with tape.)

● Small flathead screwdriver
● Lithium battery

For types A and B electronic key (

P. 24): CR2016

For type C electronic key (

P. 24): CR1620

■

Replacing the battery

For types A and B electronic key (

P. 24)

Remove the cover.

Remove the module.

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Open the case cover using a
coin protected with tape etc.
and remove the depleted bat-
tery.

Insert a new battery with the
“+” terminal facing up.

For type C electronic key (

P. 24)

Lift the cover.

Insert the screw driver in the
slot and push down.

Remove the cover.

Insert the screw driver in the
bottom of the key and push
down.

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■

If the key battery is discharged

The following symptoms may occur.

●

The wireless remote control will not function properly.

●

The operational range is reduced.

■

Use a lithium battery

●

Batteries can be purchased at your Scion dealer, jewelers, or camera
stores.

●

Replace only with the same or equivalent type recommended by your
Scion dealer.

●

Dispose of used batteries according to local laws.

CAUTION

■

Removed battery and other parts

These parts are small and if swallowed by a child, they can cause choking.
Keep away from children. Failure to do so could result in death or serious
injury.

Remove the depleted battery.

Insert a new battery with the
“+” terminal facing up.

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NOTICE

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For normal operation after replacing the battery

Observe the following precautions to prevent accidents.

●

Always work with dry hands. 
Moisture may cause the battery to rust.

●

Do not touch or move any other components inside the remote control.

●

Do not bend either of the battery terminals.

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4-3. Do-it-yourself maintenance

Checking and replacing fuses

If any of the electrical components do not operate, a fuse may have

blown. If this happens, check and replace the fuses as necessary.

Turn the engine switch to the LOCK position.

The fuses are located in the following places. To check the
fuses, follow the instructions below.

■

Engine compartment

Type A

Remove the cover.

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Type B

Push the tab in and lift the lid
off.

Type C

Push the tab in and lift the lid
off.

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Under the driver’s side instrument panel

Remove the lid.

After a system failure, see “Fuse layout and amperage
ratings” (

P. 248) for details about which fuse to check.

Remove the fuse with the pull-
out tool.

Check if the fuse has blown.

Type A

Normal fuse

Blown fuse

Replace it with one of an
appropriate amperage rating.
The amperage rating can be
found on the fuse box lid.

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Type B

Normal fuse

Blown fuse

Replace it with one of an
appropriate amperage rating.
The amperage rating can be
found on the fuse box lid.

Type C

Normal fuse

Blown fuse

Replace it with one of an
appropriate amperage rating.
The amperage rating can be
found on the fuse box lid.

Type D

Normal fuse

Blown fuse

Contact your Scion dealer.

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4-3. Do-it-yourself maintenance

Fuse layout and amperage ratings

■

Engine compartment (type A)

Fuse

Ampere

Circuit

1

ALT

120 A

Charging system, RDI, ABS NO.1, 
ABS NO.2, HTR-B, ACC, CIG, 
GAUGE, ECU-IG NO.1, HTR-IG, 
WIPER WASHER, AM1, DOOR 
NO.1, STOP, DOOR NO.2, OBD, 
FR FOG, DEF, TAIL, EPS, PTC 
NO.1, PTC NO.2, PTC NO.3, D/L 
NO.1, PANEL NO.1

2

MAIN

80 A

EFI MAIN, EFI NO.1, HORN, AM2 
NO.1, DOME, ECU-B NO.2, 
TURN&HAZ, H-LP MAIN, H-LP 
MAIN HI, ECU-B NO.1, D/C CUT, 
ETCS, IG2, IGN, ALT-S