2012 Lexus RX Fuse Box Diagram
The 2 fuse boxes on the 2012 Lexus RX, 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 522 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 522 of your owner's manual.
Where it isInside the car, under or behind the dashboard, driver's side. Page 526 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 526 of your owner's manual.
2012 RX engine bay fuses
Engine compartment. Tap a row to find it on the diagram.
| No. | Amps | Type | Protects |
|---|---|---|---|
| 1 | 80A | Fuse (size not listed) | RDI FAN NO. 1: Electric cooling fans |
| 2 | 50A | Fuse (size not listed) | RR DEF: Rear window defogger |
| 3 | 50A | Fuse (size not listed) | AIR SUS |
| 4 | 50A | Fuse (size not listed) | HTR: Air conditioning system |
| 5 | 30A | Fuse (size not listed) | SPARE |
| 6 | 40A | Fuse (size not listed) | SPARE |
| 7 | 30A | Fuse (size not listed) | ABS NO. 2: Anti-lock brake system |
| 8 | 30A | Fuse (size not listed) | H-LP CLN: Headlight cleaner |
| 9 | 30A | Fuse (size not listed) | PBD: Power back door system |
| 10 | 30A | Fuse (size not listed) | ST: Starter system |
| 11 | 50A | Fuse (size not listed) | PD: Daytime running light system, A/F, H-LP RH HI, H-LP LH LO, H-LP RH LO, H-LP LH HI, HORN, S-HORN, multiplex communication system, multiport fuel injection system/ sequential multiport fuel injection system |
| 12 | 50A | Fuse (size not listed) | ABS NO. 1: Anti-lock brake system |
| 13 | 60A | Fuse (size not listed) | EPS: Electric power steering system |
| 14 | 140A | Fuse (size not listed) | ALT: FUEL OPN, DR LOCK, OBD, RR FOG, S/ROOF, 4WD, INVERTER, ECU IG1 NO. 1, ECU IG1 NO. 2, PANEL, GAUGE NO. 1 |
| 15 | 30A | Fuse (size not listed) | AMP1: Audio system |
| 16 | 30A | Fuse (size not listed) | EFI MAIN: Multiport fuel injection system/ sequential multiport fuel injection system, EFI NO. 1, EFI NO. 2 |
| 17 | 30A | Fuse (size not listed) | AMP2: Audio system |
| 18 | 30A | Fuse (size not listed) | IG2: Starter system, IGN, GAUGE NO. 2, ECU IG2 |
| 19 | 25A | Fuse (size not listed) | JB: Power door lock system |
| 20 | 20A | Fuse (size not listed) | STR LOCK: Starter system |
| 21 | 15A | Fuse (size not listed) | RAD NO. 3: Meters and gauges lights, instrument panel lights, navigation system, audio system, rear seat entertainment system |
| 22 | 15A | Fuse (size not listed) | HAZ: Emergency flashers |
| 23 | 10A | Fuse (size not listed) | ETCS: Multiport fuel injection system/ sequential multiport fuel injection system |
| 24 | 10A | Fuse (size not listed) | RAD NO. 1: Audio system |
| 25 | 7.5A | Fuse (size not listed) | AM2: Starting system |
| 26 | 7.5A | Fuse (size not listed) | ECU-B NO. 2: Air conditioning system, front passenger occupant classification system, starter system |
| 27 | 7.5A | Fuse (size not listed) | MAYDAY/TEL: MAYDAY/TEL |
| 28 | 7.5A | Fuse (size not listed) | IMMOBI |
| 29 | 7.5A | Fuse (size not listed) | ALT-S: Charging system |
| 30 | 10A | Fuse (size not listed) | IGN: Starter system, multiport fuel injection system/sequential multiport fuel injection system |
| 31 | 10A | Fuse (size not listed) | DOME: Vanity mirror lights, luggage compartment lights, interior lights, personal lights |
| 32 | 7.5A | Fuse (size not listed) | ECU-B NO. 1: Interior lights, personal lights, tilt and telescopic steering, multiplex communication system, meters and gauges, power window, driving position memory system, power seats, power back door, head-up display, starter system, air conditioning system, power door lock system |
| 33 | 10A | Fuse (size not listed) | EFI NO. 1: Multiport fuel injection system/ sequential multiport fuel injection system |
| 34 | 7.5A | Fuse (size not listed) | WIP-S: Windshield wipers and washer |
| 35 | 7.5A | Fuse (size not listed) | AFS: Adaptive front-lighting system |
| 36 | 7.5A | Fuse (size not listed) | BK/UP LP: Back-up lights |
| 37 | 7.5A | Fuse (size not listed) | HEATER NO. 2: Air conditioning system, AWD system |
| 38 | 10A | Fuse (size not listed) | ECU IG1: Adaptive front-lighting system, headlight cleaner, cooling fan, cruise control, vehicle stability control, vehicle dynamics integrated management |
| 39 | 10A | Fuse (size not listed) | EFI NO. 2: Multiport fuel injection system/ sequential multiport fuel injection system |
| 40 | 15A | Fuse (size not listed) | F/PUMP: Multiport fuel injection system/ sequential multiport fuel injection system |
| 41 | 25A | Fuse (size not listed) | DEICER: Windshield wipers and washer |
| 42 | 7.5A | Fuse (size not listed) | STOP: Vehicle stability control, vehicle dynamics integrated management, high mounted stoplight |
| 43 | 20A | Fuse (size not listed) | TOWING BATT: Trailer battery |
| 44 | 30A | Fuse (size not listed) | TOWING: Trailer lights |
| 45 | 10A | Fuse (size not listed) | FILTER: Condenser |
| 46 | 30A | Fuse (size not listed) | IG1 MAIN: ECU IG1, BK/UP LP, HEATER NO. 2, AFS |
| 47 | 15A | Fuse (size not listed) | H-LP RH HI: Right-hand headlight (high beam) |
| 48 | 15A | Fuse (size not listed) | H-LP LH HI: Left-hand headlight (high beam) |
| 49 | 10A | Fuse (size not listed) | BIXENON: Discharge headlight |
| 50 | 15A | Fuse (size not listed) | H-LP RH LO: Right-hand headlight (low beam) |
| 51 | 15A | Fuse (size not listed) | H-LP LH LO: Left-hand headlight (low beam) |
2012 RX driver's side panel fuses
Driver’s side instrument panel. Tap a row to find it on the diagram.
| No. | Amps | Type | Protects |
|---|---|---|---|
| 1 | 15A | Fuse (size not listed) | P/POINT |
| 2 | 10A | Fuse (size not listed) | ECU-ACC |
| 3 | 15A | Fuse (size not listed) | CIG |
| 4 | 7.5A | Fuse (size not listed) | RADIO NO. 2 |
| 5 | 10A | Fuse (size not listed) | GAUGE NO. 1 |
| 6 | 10A | Fuse (size not listed) | ECU-IG1 NO. 3: Outside rear view mirror, windshield wipers and washer, seat heaters, starter system, power outlet, moon roof, Automatic High Beam |
| 7 | 10A | Fuse (size not listed) | ECU-IG1 NO. 1: Multiplex communication system, electric power steering system, shift lock control system, tilt and telescopic steering, starter system, automatic transmission system, power back door, tire pressure warning system |
| 8 | 30A | Fuse (size not listed) | S/ROOF: Moon roof |
| 9 | 7.5A | Fuse (size not listed) | FUEL OPN: Fuel filler door opener |
| 10 | 30A | Fuse (size not listed) | PSB: Pre-collision seat belt |
| 11 | 30A | Fuse (size not listed) | & TE: Tilt and telescopic steering system |
| 12 | 10A | Fuse (size not listed) | DR LOCK: Power door lock system |
| 13 | 15A | Fuse (size not listed) | FR FOG: Front fog lights |
| 14 | 30A | Fuse (size not listed) | P-SEAT LH: Power seat (left-side) |
| 15 | 7.5A | Fuse (size not listed) | 4WD: AWD system |
| 16 | 20A | Fuse (size not listed) | INVERTER |
| 17 | 7.5A | Fuse (size not listed) | RR FOG |
| 18 | 25A | Fuse (size not listed) | D/L ALT B: Multiplex communication system |
| 19 | 10A | Fuse (size not listed) | HEATER: Air conditioning system |
| 20 | 10A | Fuse (size not listed) | ECU-IG1 NO. 2: Air conditioning system, multiport fuel injection system/sequential multiport fuel injection system, SRS airbag system, multi-information display |
| 21 | 10A | Fuse (size not listed) | PANEL: Switch illumination, navigation system, headlight cleaner, windshield wiper de-icer, seat heater, power back door, audio system, multi-information display, air conditioning system |
| 22 | 10A | Fuse (size not listed) | TAIL: Parking lights, side marker lights, tail lights, license plate lights, front fog lights, towing converter |
| 23 | 20A | Fuse (size not listed) | AIR SUS |
| 24 | 30A | Fuse (size not listed) | P-SEAT RH: Power seat (right-side) |
| 25 | 7.5A | Fuse (size not listed) | OBD: On-Board diagnosis |
| 26 | 25A | Fuse (size not listed) | FR DOOR: Front power window (right-side) |
| 27 | 25A | Fuse (size not listed) | RR DOOR: Rear power window (right-side) |
| 28 | 25A | Fuse (size not listed) | FL DOOR: Front power window (left-side) |
| 29 | 25A | Fuse (size not listed) | RL DOOR: Rear power window (left-side) |
| 30 | 25A | Fuse (size not listed) | FR WASH: Windshield wipers and washer |
| 31 | 15A | Fuse (size not listed) | RR WIP: Windshield wipers and washer |
| 32 | 20A | Fuse (size not listed) | RR WASH: Windshield wipers and washer |
| 33 | 30A | Fuse (size not listed) | FR WIP: Windshield wipers and washer |
| 34 | 10A | Fuse (size not listed) | ECU IG2: Starter system, intuitive parking assist, AWD system |
| 35 | 7.5A | Fuse (size not listed) | GAUGE NO. 2: Starter system |
| 36 | 15A | Fuse (size not listed) | RH S-HTR: Seat heater (right-side) |
| 37 | 15A | Fuse (size not listed) | LH S-HTR: Seat heater (left-side) |
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 Lexus RX Owner's Manual, "Fuses" section, p. 522 and 526.
Always replace a fuse with one of the same amp rating. If a new fuse blows straight away, the circuit has a fault.