Toyota IQ (2008 – 2015) – fuse box diagram
Year of production: 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
Fuse box in engine compartment (type A)
| Fuse | Ampere | Circuit | |
| 1 | ALT | 120 | Charging system, RDI, ABS NO.1, HTR-B, ACC, CIG, GAUGE, ECUIG 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 |
| 2 | MAIN | 80 | EFI 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 |
Fuse box in engine compartment (type B)
| Fuse | Ampere | Circuit | |
| 1 | D/C CUT | 30 | ECU-B NO.1, DOME |
| 2 | IMMOBI | 7,5 | Smart entry & start system |
| 3 | TURN & HAZ | 10 | Turn signal lights, emergency flashers |
| 4 | ETCS | 10 | Electronic throttle control system |
| 5 | ECU-B NO.2 | 5 | Meter, power windows, air conditioning system |
| 6 | AM2 NO.2 | 7,5 | Power management ECU |
| 7 | H-LP LH*1 | 10 | Left-hand headlight |
| H-LP LO*2 | 20 | Headlight (low beam) | |
| 8 | (BBC) | 40 | No circuit |
| 9 | SPARE | 30 | Spare fuse |
| 10 | SPARE | 20 | Spare fuse |
| 11 | SPARE | 5 | Spare fuse |
| 12 | AM2 NO.1 | 30 | Starting system |
| 13 | H-LP HI*2 | 7,5 | Headlight (high beam) |
| 14 | (STRG LOCK) | 20 | Steering lock system |
| 15 | H-LP RH*1 | 10 | Right-hand headlight |
| 16 | DOME | 15 | Interior light, audio system |
| 17 | ECU-B NO.1 | 7,5 | Main body ECU, power door lock system, smart entry & start system |
| 18 | (MIR HTR) | 7,5 | Outside rear view mirror defoggers |
| 19 | WIP-S | 7,5 | Power management ECU |
| 20 | DEFOGGER | 30 | Rear window defogger |
| 21 | EPS | 50 | Electric power steering |
| 22 | RDI | 30 | RDI FAN |
| 23 | ABS NO.1 | 50 | Vehicle stability control system |
| 24 | HTR-B | 40 | HTR, BLR |
| 25 | ABS NO.2 | 30 | Vehicle stability control system |
| 26 | HORN | 10 | Horn |
| 27 | EFI-MAIN | 20 | Multiport fuel injection system/ sequential multiport fuel injection system, EFI NO.1, Fuel pump |
| 28 | IGN | 15 | Injection, igniter |
| 29 | IG2 | 10 | Smart entry & start system, SRS airbag system, meter |
| 30 | EFI NO.1 | 10 | Multiport fuel injection system/ sequential multiport fuel injection system |
*1: Vehicles without daytime running light system and automatic light off system
*2: Vehicles with daytime running light system or automatic light off system
Fuse box in engine compartment (type C: if equipped)
| Fuse | Ampere | Circuit | |
| 1 | (PTC NO.1) | 30* | PTC heater |
| 50* | PTC heater | ||
| 2 | (PTC NO.3) | PTC heater | |
| 3 | (DEICER) | 20 | No circuit |
| (PWR HTR) | 25 | No circuit | |
| 4 | (PTC NO.2) | 30 | PTC heater |
| 5 | (H-LP RH LO) | 10 | Right-hand headlight (low beam) |
| 6 | (H-LP LH LO) | 10 | Left-hand headlight (low beam) |
*: Replace the fuse with one of the same ampere rating as the original.
Fuse box under the instrument panel
| Fuse | Ampere | Circuit | |
| 1 | ECU-IG NO.1 | 7,5 | Vehicle stability control system, shift lock control system, electric power steering, automatic headlight, main body ECU |
| 2 | GAUGE | 10 | Electric cooling fan(s), charging system, emergency flashers, front passenger’s seat belt reminder light, back-up lights, multiport fuel injection system/sequential multiport fuel injection system, windshield wiper ECU, auto anti-glare inside rear view mirror |
| 3 | HTR-IG | 10 | Air conditioning system, wiper deicer, rear window defogger |
| 4 | WASHER RR | 10 | Windshield washer |
| 5 | WIPER RR | 10 | Rear window wiper |
| 6 | WIPER FR | 25 | Windshield wipers |
| 7 | WASHER FR | 10 | Windshield washer |
| 8 | OBD | 7,5 | On-board diagnosis system |
| 9 | (FOG RR) | 7,5 | Rear fog light |
| 10 | TAIL NO.1*1 | 10 | Manual headlight leveling dial, front position lights, tail lights, license plate lights |
| (PANEL NO.2)*2 | 5 | Daytime running light system | |
| 11 | DOOR NO.2 | 20 | Power windows |
| 12 | D/L NO.1 | 15 | Power door lock system, main body ECU |
| 13 | DOOR NO.1 | 30 | Power windows |
| 14 | CIG | 15 | Power outlet |
| 15 | ACC | 5 | Outside rear view mirrors, audio system, shift lock control system, main body ECU |
| 16 | PANEL*1 | 5 | Meter, power management ECU |
| (PANEL NO.1)*2 | Meter | ||
| 17 | TAIL NO.2*1 | 10 | Front 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 cluster, windshield wiper ECU |
| TAIL*2 | |||
| 18 | (FOG FR) | 15 | Front fog lights |
| 19 | AM1 | 7,5 | ACC, starting system |
| 20 | STOP | 10 | Vehicle 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 | Power door lock system |
| 22 | (SEAT-HTR) | 15 | Seat heaters |
*1: Vehicles without daytime running light system and automatic light off system
*2: Vehicles with daytime running light system or automatic light off system
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.