2012 TOYOTA IQ ECU

332 4-3. Do-it-yourself maintenance
iQ_WE_74014E
CAUTION
Using the jack
Improper use of the jack may lead to death or serious injuries due to the
vehicle suddenly falling off the jack.
Do not use the jack for any purpose other than replacing tires or installing
and removing tire chains.
Only use the jack that comes with this vehicle for replacing a tire.
Do not use it on other vehicles, and do not use other jacks for replacing
tires on this vehicle.
Always check that the jack is securely set to the jack point.
Do not put any part of your body under the vehicle supported by a jack.
Do not start or run the engine while your vehicle is supported by the jack.
Do not raise the vehicle while someone is in it.
When raising the vehicle, do not put an object on or under the jack.
Do not raise the vehicle to a height greater than that required to replace
the tire.
Use a jack stand if it is necessary to get under the vehicle.
Take particular care when lowering the vehicle to ensure that no one working
on or near the vehicle will be injured.
Replacing a tire
Observe the following precautions to reduce the risk of death or serious
injury.
Have the wheel nuts tightened with a torque wrench to 103 N·m (10.5
kgf·m, 76 ft·lbf) as soon as possible after changing wheels.
Failure to follow these precautions could cause the nuts to loosen and the
wheel may fall off, which could lead to an accident causing death or seri-
ous injury.
Do not attach a heavily damaged wheel ornament, as it may fly off the
wheel while the vehicle is moving.

343 4-3. Do-it-yourself maintenance
4
Maintenance and care
iQ_WE_74014EBattery exterior
Make sure that the battery terminals are not corroded and that
there are no loose connections, cracks, or loose clamps.
Terminals
Hold-down clamp
Checking battery fluid
Check that the level is between
UPPER and LOWER.
UPPER
LOWER
If the fluid level is at or below
LOWER, add distilled water.
Adding distilled water
Remove the vent plug.
Add distilled water.
If the UPPER line cannot be
seen, check the fluid level by
looking directly at the cell.
Put the vent plug back on and close securely.

366 4-3. Do-it-yourself maintenance
iQ_WE_74014E
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

367 4-3. Do-it-yourself maintenance
4
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

368 4-3. Do-it-yourself maintenance
iQ_WE_74014E
*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

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

371 4-3. Do-it-yourself maintenance
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Maintenance and care
iQ_WE_74014E
*1: Vehicles without daytime running light system and automatic light off system
*2: Vehicles with daytime running light system or automatic light off system10TAIL NO.1
*110 AManual headlight leveling dial, front
position lights, tail lights, license
plate lights
(PANEL NO.2)*25 A Daytime running light system
11 DOOR NO.2 20 A Power windows
12 D/L NO.1 15 APower door lock system, main body
ECU
13 DOOR NO.1 30 A Power windows
14 CIG 15 A Power outlet
15 ACC 5 AOutside rear view mirrors, audio
system, shift lock control system,
main body ECU
16PA N E L
*1
5 AMeter, power management ECU(PANEL NO.1)*2Meter
17TAIL NO.2
*1
10 AFront position lights, tail lights,
license plate lights, rear fog light,
front fog lights, manual headlight
leveling dial, multiport fuel injection
system/sequential multiport fuel
injection system, instrument clus-
ter, windshield wiper ECU TA I L
*2
18 (FOG FR) 15 A Front fog lights
19 AM1 7.5 A ACC, starting system
20 STOP 10 AVehicle stability control system,
power management ECU, shift lock
control system, stop lights, multiport
fuel injection system/sequential
multiport fuel injection system
21 (D/L NO.2) 10 A Power door lock system
22 (SEAT-HTR) 15 A Seat heaters
FuseAmpereCircuit

384 4-3. Do-it-yourself maintenance
iQ_WE_74014E
LED light bulbs
The high mounted stoplight consist of a number of LEDs. If any of the LEDs
burn out, take your vehicle to any authorized Toyota dealer or repairer, or
another duly qualified and equipped professional to have the light replaced.
CAUTION
Replacing light bulbs
Turn off the lights. Do not attempt to replace the bulb immediately after
turning off the lights.
The bulbs become very hot and may cause burns.
Do not touch the glass portion of the light bulb with bare hands. When it is
unavoidable to hold the glass portion, use and hold with a clean dry cloth
to avoid getting moisture and oils on the bulb.
Also, if the bulb is scratched or dropped, it may blow out or crack.
Fully install light bulbs and any parts used to secure them. Failure to do so
may result in heat damage, fire, or water entering the headlight unit. This
may damage the headlights or cause condensation to build up on the lens.
To prevent damage or fire
Make sure bulbs are fully seated and locked.