TOYOTA IQ 2012 Owners Manual

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4-3. Do-it-yourself maintenance
4
Maintenance and care
iQ_WE_74014E
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.
Vehicles without smart entry & start system:
Turn the engine switch to the LOCK position.
Vehicles with smart entry & start system:
Turn the “ENGINE START STOP” switch OFF.
The fuses are located in the following places. To check the
fuses, follow the instructions below.
Engine compartment
Ty p e A
Remove the cover.

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Ty p e B
Push the tab in and lift the lid
off.
Type C (if equipped)
1. Pinch the latches and
remove the washer inlet
from the bracket.
Press the claw and
remove the washer inlet
from the bracket.

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2. Push the tab in and lift the
lid off.
Under the instrument panel (left-hand drive vehicles)
Driver’s side instrument panel
Remove the lid.

364 4-3. Do-it-yourself maintenance
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Under the instrument panel (right-hand drive vehicles)
Passenger’s side instrument panel
1. Remove the cover.
Use a flathead screwdriver
which is wrapped with a cloth.
2. Remove the lid.
After a system failure, see “Fuse layout and amperage rat-
ings” (P. 366) for details about which fuse to check.
Remove the fuse with the pull-
out tool.

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Check if the fuse has blown.
Ty p e 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.
Ty p e 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.
Ty p e C
Normal fuse
Blown fuse
Contact any authorized Toyota
dealer or repairer, or another
duly qualified and equipped
professional.

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Fuse layout and amperage ratings
Engine compartment (type A)
FuseAmpereCircuit
1 ALT 120 ACharging system, RDI, ABS NO.1,
HTR-B, ACC, CIG, GAUGE, ECU-
IG NO.1, HTR-IG, WIPER
WASHER, AM1, DOOR NO.1,
STOP, DOOR NO.2, OBD, RR
FOG, FR FOG, DEF, TAIL NO.2,
EPS, PTC NO.1, PTC NO.2, PTC
NO.3, DEICER, D/L NO.1, D/L
NO.2, PANEL
2MAIN 80 AEFI MAIN, EFI NO.1, HORN, AM2
NO.1, AM2 NO.2, DOME, ECU-B
NO.2, TURN&HAZ, H-LP LO, H-LP
LH LO, ECU-B NO.1, D/C CUT,
ETCS, H-LP HI, IG2, IGN

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Maintenance and care
iQ_WE_74014EEngine compartment (type B)
FuseAmpereCircuit
1 D/C CUT 30 A ECU-B NO.1, DOME
2 IMMOBI 7.5 A Smart entry & start system
3 TURN & HAZ 10 ATurn signal lights, emergency
flashers
4 ETCS 10 A Electronic throttle control system
5 ECU-B NO.2 5 AMeter, power windows, air condi-
tioning system
6 AM2 NO.2 7.5 A Power management ECU
7H-LP LH
*110 A Left-hand headlight
H-LP LO
*220 A Headlight (low beam)
8 (BBC) 40 A No circuit
9 SPARE 30 A Spare fuse
10 SPARE 20 A Spare fuse
11 SPARE 5 A Spare fuse
12 AM2 NO.1 30 A Starting system

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*1: Vehicles without daytime running light system and automatic light off sys-
tem
*2: Vehicles with daytime running light system or automatic light off system13 H-LP HI
*27.5 A Headlight (high beam)
14 (STRG LOCK) 20 A Steering lock system
15 H-LP RH
*110 A Right-hand headlight
16 DOME 15 A Interior light, audio system
17 ECU-B NO.1 7.5 AMain body ECU, power door lock
system, smart entry & start system
18 (MIR HTR) 7.5 A Outside rear view mirror defoggers
19 WIP-S 7.5 A Power management ECU
20 DEFOGGER 30 A Rear window defogger
21 EPS 50 A Electric power steering
22 RDI 30 A RDI FAN
23 ABS NO.1 50 A Vehicle stability control system
24 HTR-B 40 A HTR, BLR
25 ABS NO.2 30 A Vehicle stability control system
26 HORN 10 A Horn
27 EFI-MAIN 20 AMultiport fuel injection system/
sequential multiport fuel injection
system, EFI NO.1, Fuel pump
28 IGN 15 A Injection, igniter
29 IG2 10 ASmart entry & start system, SRS
airbag system, meter
30 EFI NO.1 10 AMultiport fuel injection system/
sequential multiport fuel injection
system
FuseAmpereCircuit

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Maintenance and care
iQ_WE_74014EEngine compartment (type C: if equipped)
*: Replace the fuse with one of the same ampere rating as the original.
FuseAmpereCircuit
1(PTC NO.1)30 A
*PTC heater
50 A
*PTC heater
2 (PTC NO.3) 30 A PTC heater
3(DEICER) 20 A No circuit
(PWR HTR) 25 A No circuit
4 (PTC NO.2) 30 A PTC heater
5 (H-LP RH LO) 10 A Right-hand headlight (low beam)
6 (H-LP LH LO) 10 A Left-hand headlight (low beam)

370 4-3. Do-it-yourself maintenance
iQ_WE_74014EUnder the instrument panel
FuseAmpereCircuit
1 ECU-IG NO.1 7.5 AVehicle stability control system,
shift lock control system, electric
power steering, automatic head-
light, main body ECU
2 GAUGE 10 AElectric cooling fan(s), charging
system, 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, auto anti-glare
inside rear view mirror
3 HTR-IG 10 AAir conditioning system, wiper
deicer, rear window 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 (FOG RR) 7.5 A Rear fog light