2013 TOYOTA IQ light

224 4-3. Do-it-yourself maintenance
3Snow tiresFor 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 restriction. Snow tires
should be installed on all wheels. ( P. 149)
■Initializing the tire pr essure warning system
Initialize the tires with the tire inflati on pressure adjusted to the specified
level.
■If you push the tire pressure warning reset switch accidentally
If initialization is performed, adjust the tire in flation 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
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 Scion
dealer.
●When operating the tire pressure warning reset switch, the tire pres-
sure warning light does not blink 3 times.
●After carrying out the initialization procedure, the tire pressure warn-
ing light blinks for 1 minute then stays on after driving for about 20
minutes.
■Routine tire inflation pressure checks
The tire pressure warning system doe s not replace routine tire inflation
pressure checks. Make sure to check tire inflation pressure as part of
your routine of daily vehicle checks.

226 4-3. Do-it-yourself maintenance
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 makes, models or tread patterns.
Also, do not mix tires of remarkably different treadwear.
●Do not use tire sizes other t han those recommended by Scion.
●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.
■When initializing the 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 tire inflation pressure is actually nor-
mal.

245
4-3. Do-it-yourself maintenance
4
Maintenance and care
■
Engine compartment (type B)
FuseAmpereCircuit
1 D/C CUT 30 A ECU-B NO.1, DOME
2 IMMOBI 7.5 AMultiport fuel injection system/
sequential multiport fuel injection
system
3 TURN & HAZ 10 A Turn signal lights, emergency
flashers
4 ETCS 10 A Electronic throttle control system
5 ECU-B NO.2 5 A Meter, power windows, air condi-
tioning system
6H-LP MAIN
*120 A H-LP RH LO, H-LP LH LO
7 SPARE 30 A Spare fuse
8 SPARE 20 A Spare fuse
9 SPARE 5 A Spare fuse
10 AM2 NO.1 30 A Starting system 11 H-LP MAIN HI
*225 A H-LP RH HI, H-LP LH HI
12 DOME 15 A Interior light, audio system
13 ECU-B NO.1 7.5 A Main body ECU, power door lock
system

246 4-3. Do-it-yourself maintenance
*1: Vehicles with daytime running light system
*2: Vehicles without daytime running light system14 MIR HTR 7.5 A Outside rear view mirror defoggers
15 DEFOGGER 30 A Rear window defogger
16 EPS 50 A Electric power steering
17 RDI 30 A RDI FAN
18 ABS NO.1 50 A Anti-lock brake system
19 HTR-B 40 A HTR, BLR
20 ABS NO.2 30 A Anti-lock brake system
21 HORN 10 A Horn
22 EFI-MAIN 20 A
Multiport fuel injection system/
sequential multiport fuel injection
system, EFI NO.1, Fuel pump
23 ALT-S 7.5 A Charging system
24 IGN 15 A Injection, igniter
25 IG2 10 A SRS airbag system, meter
26 EFI NO.1 10 AMultiport fuel injection system/
sequential multiport fuel injection
system
FuseAmpereCircuit

247
4-3. Do-it-yourself maintenance
4
Maintenance and care
■
Engine compartment (type C)
*: Vehicles with daytime running light system or automatic light off system
FuseAmpereCircuit
1 PTC NO.1 50 A PTC heater
2 PTC NO.3 30 A PTC heater
3 PTC NO.2 30 A PTC heater
4 H-LP RH HI 10 A Headlight (high beam)
5 H-LP LH HI 10 A Headlight (high beam)
6 H-LP RH LO
*10 A Right-hand headlight (low beam)
7 H-LP LH LO
*10 A Left-hand headlight (low beam)

248 4-3. Do-it-yourself maintenance
■Under the driver’s side instrument panel
FuseAmpereCircuit
1 ECU-IG NO.1 7.5 A Vehicle stability control system,
shift lock control system, electric
power steering, automatic head-
light system, main body ECU, tire
pressure warning system
2 GAUGE 10 A Electric cooling fan, charging sys-
tem, emergency flashers, front
passenger’s seat belt reminder
light, back-up lights, multiport fuel
injection system/sequential multi-
port fuel injection system, wind-
shield wiper ECU
3 HTR-IG 10 A Air conditioning system, rear win-
dow defogger
4 WASHER RR 10 A Windshield washer
5 WIPER RR 10 A Rear window wiper
6 WIPER FR 25 A Windshield wipers
7 WASHER FR 10 A Windshield washer
8 OBD 7.5 A On-board diagnosis system
9 DOOR NO.2 20 A Power windows

249
4-3. Do-it-yourself maintenance
4
Maintenance and care
*: Vehicles with daytime running light system
10 D/L NO.1
15 APower door lock system, main
body ECU
11 DOOR NO.1 30 A Power windows
12 CIG 15 A Power outlet
13 ACC 5 AOutside rear view mirrors, audio
system, shift lock control system,
main body ECU
14
PANEL NO.1*5 A Meter
15 TAIL
*10 A Parking lights, tail lights, license
plate lights, multiport fuel injection
system/sequential multiport fuel
injection system, instrument clus-
ter, windshield wiper ECU
16 (FOG FR) 15 A No circuit
17 AM1 7.5 A ACC, starting system
18 STOP 10 A Vehicle stability control system,
power management ECU, shift
lock control system, stop lights,
multiport fuel injection system/
sequential multiport fuel injection
system
19 (SEAT-HTR) 15 A No circuit
■ 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. 251)
● If the replaced fuse blows again, have the vehicle inspected by your
Scion dealer.
■ If there is an overload in the circuits
The fuses are designed to blow, protecting the wiring harness from damage.
FuseAmpereCircuit

251
4-3. Do-it-yourself maintenance
4
Maintenance and care
Light bulbs
You may replace the following bulbs yourself. The difficulty level of
replacement varies depending on the bulb. If necessary bulb
replacement seems difficult to perf orm, contact your Scion dealer.
For more information about replacing other light bulbs, contact your
Scion dealer.
■ Prepare a replacement light bulb.
Check the wattage of the light bulb being replaced. ( P. 324)
■ Front bulb locations
Headlight (low beam)
Parking/front
side marker
light
Headlights (high beam) and
daytime running light
Front turn signal light