2012 Toyota 4Runner Fuse Box Diagram
The 2 fuse boxes on the 2012 Toyota 4Runner, with every fuse and relay. Tap a fuse to see what it protects, or search for the thing that stopped working.
Where it isUnder the hood in the engine bay. Page 559 of the owner's manual shows the exact spot.
Slot map: the fuses are listed in the manual's order, not where they sit in the box. Match the numbers to the label inside the box cover, or the drawing on page 559 of your owner's manual.
Where it isInside the car, under or behind the dashboard, driver's side. Page 562 of the owner's manual shows the exact spot.
Slot map: the fuses are listed in the manual's order, not where they sit in the box. Match the numbers to the label inside the box cover, or the drawing on page 562 of your owner's manual.
2012 4Runner engine bay fuses
Engine compartment. Tap a row to find it on the diagram.
| No. | Amps | Type | Protects |
|---|---|---|---|
| 1 | 30A | Fuse (size not listed) | PTC HTR NO.3: PTC heater |
| 2 | 30A | Fuse (size not listed) | DEF: Rear window defogger |
| 3 | 20A | Fuse (size not listed) | DEICER: Windshield wiper de-icer |
| 4 | 30A | Fuse (size not listed) | PTC HTR NO.2: PTC heater |
| 5 | 30A | Fuse (size not listed) | SUB BATT: Trailer sub battery |
| 6 | 50A | Fuse (size not listed) | PTC HTR NO.1: PTC heater |
| 7 | 10A | Fuse (size not listed) | MIR HTR: Outside rear view mirror defoggers |
| 8 | 30A | Fuse (size not listed) | TOWING TAIL: Trailer tail light |
| 9 | 10A | Fuse (size not listed) | A/C COMP: Air conditioning system |
| 10 | 10A | Fuse (size not listed) | STOP: Stop/tail lights |
| 11 | 20A | Fuse (size not listed) | IG2: INJ, IGN, GAUGE fuses |
| 12 | 10A | Fuse (size not listed) | HORN: Horn(s) |
| 13 | 25A | Fuse (size not listed) | EFI: Multiport fuel injection system/ sequential multiport fuel injection system |
| 14 | 20A | Fuse (size not listed) | A/F: A/F sensor |
| 15 | 10A | Fuse (size not listed) | H-LP RH-HI: Right-hand headlight (high beam) |
| 16 | 10A | Fuse (size not listed) | H-LP LH-HI: Left-hand headlight (high beam) |
| 17 | 50A | Fuse (size not listed) | HTR: Air conditioning system |
| 18 | 80A | Fuse (size not listed) | 400W INV: Power outlets |
| 19 | 30A | Fuse (size not listed) | ST: Starter system |
| 20 | 20A | Fuse (size not listed) | H-LP HI: H-LP RH-HI, H-LP LH-HI fuses |
| 21 | 7.5A | Fuse (size not listed) | ALT-S: Charging system |
| 22 | 15A | Fuse (size not listed) | TURN&HAZ: Turn signal lights, emergency flashers |
| 23 | 10A | Fuse (size not listed) | ETCS: Multiport fuel injection system/ sequential multiport fuel injection system |
| 24 | 30A | Fuse (size not listed) | PRB: Automatic running boards system |
| 25 | 30A | Fuse (size not listed) | TOWING: Trailer stop/turn lights |
| 26 | – | Fuse (size not listed) | Not used |
| 27 | 10A | Fuse (size not listed) | SHORT PIN RAD NO.1: Audio system |
| 28 | 7.5A | Fuse (size not listed) | AM2: Starter system |
| 29 | 7.5A | Fuse (size not listed) | MAYDAY: MAYDAY |
| 30 | 30A | Fuse (size not listed) | AMP: Audio system |
| 31 | 50A | Fuse (size not listed) | ABS NO.1: ABS, VSC |
| 32 | 30A | Fuse (size not listed) | ABS NO.2: ABS, VSC |
| 33 | 10A | Fuse (size not listed) | DOME: Interior lights, vanity lights |
| 34 | 10A | Fuse (size not listed) | ECU-B: Multiplex communication system, meter and gauge |
| 35 | 10A | Fuse (size not listed) | H-LP RH-LO: Right-hand headlight (low beam) |
| 36 | 10A | Fuse (size not listed) | H-LP LH-LO: Left-hand headlight (low beam) |
| 37 | 10A | Fuse (size not listed) | INJ: Multiport fuel injection system/ sequential multiport fuel injection system |
| 38 | 7.5A | Fuse (size not listed) | EFI NO.2: Multiport fuel injection system/ sequential multiport fuel injection system |
| 39 | 140A | Fuse (size not listed) | ALT: HTR, 400W INV, A/C COMP, TOWING TAIL, SUB BATT, MIR HTR, DEF, DEICER, STOP, PTC HTR NO.1, PTC HTR NO.2, PTC HTR NO.3, S/HTR FR, ACC, P/OUTLET, IG1, ECU-IG NO.1, ECU-IG NO.2, WIP, WASHER, KDSS, 4WD, BKUP LP, TOWING BKUP, DOOR P, DOOR RL, DOOR RR, DOOR D, P/SEAT FL, P/SEAT FR, DOOR, A/C, OBD, DOOR BACK, S/ROOF, PANEL, TAIL, FOG FR, D/L NO.2 fuses |
| 40 | 10A | Fuse (size not listed) | SPARE: |
| 41 | 15A | Fuse (size not listed) | SPARE: |
| 42 | 20A | Fuse (size not listed) | SPARE: |
| 43 | 80A | Fuse (size not listed) | P/I-B: IG2, EFI, A/F, HORN fuses |
| 44 | 10A | Fuse (size not listed) | SECURITY: Multiport fuel injection system/ sequential multiport fuel injection system |
| 45 | 7.5A | Fuse (size not listed) | SMART: Smart key system |
| 46 | 20A | Fuse (size not listed) | STRG LOCK: Steering lock system |
| 47 | 30A | Fuse (size not listed) | TOWING BRK : Replace the fuse with: Trailer brake controller |
2012 4Runner driver's side panel fuses
Driver’s side instrument panel. Tap a row to find it on the diagram.
| No. | Amps | Type | Protects |
|---|---|---|---|
| 18 | 25A | Fuse (size not listed) | DOOR RL: Power windows |
| 19 | 7.5A | Fuse (size not listed) | AM1: Starter system |
| 20 | 7.5A | Fuse (size not listed) | A/C: Air conditioning system |
| 21 | 7.5A | Fuse (size not listed) | OBD: On-Board diagnosis |
| 22 | 15A | Fuse (size not listed) | FOG FR: Fog lights |
| 23 | 25A | Fuse (size not listed) | D/L NO.2: Multiplex communication system |
| 24 | 30A | Fuse (size not listed) | P/SEAT FL: Front driver’s power seat |
| 25 | 20A | Fuse (size not listed) | 4WD: Four wheel drive system |
| 26 | 10A | Fuse (size not listed) | KDSS: Kinetic dynamic suspension system |
| 27 | 10A | Fuse (size not listed) | TOWING BKUP: Trailer back-up lights |
| 28 | 10A | Fuse (size not listed) | BKUP LP: Back-up lights |
| 29 | 7.5A | Fuse (size not listed) | ACC: Multiport fuel injection system/ sequential multiport fuel injection system |
| 30 | 15A | Fuse (size not listed) | P/OUTLET: Power outlets |
| 562 | 7.5A | Fuse (size not listed) | 17 DOOR: Stop/tail lights Instrument panel lights Meter and gauge Multiport fuel injection system/ sequential multiport fuel injection system, air bag system, smart key system Wiper and washer Wiper and washer Electric moon roof Power windows Power windows Multiplex communication system Power windows Front passenger's power seat Seat heater system Air conditioning system, multiport fuel injection system/ sequential multiport fuel injection system Turn signal lights, emergency flashers Vehicle stability control system, tire pressure warning system, steering sensor Power windows |
Blade fuse colours
- 5A Tan
- 7.5A Brown
- 10A Red
- 15A Blue
- 20A Yellow
- 25A Clear
- 30A Green
- 35A Blue-green
- 40A Orange
Cartridge (J-case) colours
- 20A Blue
- 25A White
- 30A Pink
- 40A Green
- 50A Red
- 60A Yellow
Source: 2012 Toyota 4Runner Owner's Manual, "Fuses" section, p. 559 and 562.
Always replace a fuse with one of the same amp rating. If a new fuse blows straight away, the circuit has a fault.