2012 Lexus CT Fuse Box Diagram
The 2 fuse boxes on the 2012 Lexus CT, 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 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.
Where it isInside the car, under or behind the dashboard, left side. Page 566 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 566 of your owner's manual.
2012 CT engine bay fuses
Engine compartment. Tap a row to find it on the diagram.
| No. | Amps | Type | Protects |
|---|---|---|---|
| 1 | 125A | Fuse (size not listed) | DC/DC: Inverter and converter |
| 2 | 50A | Fuse (size not listed) | HTR: Air conditioning system |
| 3 | 30A | Fuse (size not listed) | RDI: Electric cooling fans |
| 4 | 30A | Fuse (size not listed) | CDS: Electric cooling fans |
| 5 | 15A | Fuse (size not listed) | RAD NO.1: Audio system, navigation system |
| 6 | 10A | Fuse (size not listed) | S-HORN: Navigation system |
| 7 | 30A | Fuse (size not listed) | ENG W/P: Cooling system |
| 8 | 7.5A | Fuse (size not listed) | ABS MAIN NO.2: Electronically controlled brake system |
| 9 | 30A | Fuse (size not listed) | H-LP CLN: Headlight cleaner |
| 10 | 30A | Fuse (size not listed) | P CON MTR: P position control system |
| 11 | 30A | Fuse (size not listed) | AMP NO.2: Audio system |
| 12 | 10A | Fuse (size not listed) | ETCS: Multiport fuel injection system/ sequential multiport fuel injection system |
| 13 | 30A | Fuse (size not listed) | IGCT: PCU, IGCT NO.2, IGCT NO.3 |
| 14 | 5A | Fuse (size not listed) | DC/DC-S: Inverter and converter |
| 15 | 7.5A | Fuse (size not listed) | P CON MAIN: P position control system, P position switch |
| 16 | 7.5A | Fuse (size not listed) | AM2: Power management system |
| 17 | 7.5A | Fuse (size not listed) | ECU-B2: Smart access system with push-button start |
| 18 | 10A | Fuse (size not listed) | MAYDAY: MAYDAY |
| 19 | 10A | Fuse (size not listed) | ECU-B3: Air conditioning system |
| 20 | 10A | Fuse (size not listed) | TURN & HAZ: Turn signal lights, emergency flashers |
| 21 | 30A | Fuse (size not listed) | AMP NO.1: Audio system |
| 22 | 20A | Fuse (size not listed) | ABS MAIN NO.1: Electronically controlled brake system |
| 23 | 40A | Fuse (size not listed) | P/I 2: P position control system, horn, headlights (low beam), back-up lights |
| 24 | 30A | Fuse (size not listed) | ABS MTR 1: Electronically controlled brake system |
| 25 | 30A | Fuse (size not listed) | ABS MTR 2: Electronically controlled brake system |
| 26 | 20A | Fuse (size not listed) | H-LP HI MAIN: H-LP RH HI, H-LP LH HI |
| 27 | 7.5A | Fuse (size not listed) | DRL: Daytime running light system |
| 28 | 25A | Fuse (size not listed) | DOOR NO.2: Power door lock system |
| 29 | 60A | Fuse (size not listed) | P/I 1: IG2, EFI MAIN, BATT FAN |
| 30 | 60A | Fuse (size not listed) | EPS: Electric power steering system |
| 31 | 10A | Fuse (size not listed) | PCU: Hybrid system |
| 32 | 10A | Fuse (size not listed) | IGCT NO.2: Hybrid system, P position control system, power management system |
| 33 | 10A | Fuse (size not listed) | IGCT NO.3: Cooling system |
| 34 | 10A | Fuse (size not listed) | DOME: Luggage compartment light, overhead module, interior lights, personal lights, vanity lights, footwell lights |
| 35 | 7.5A | Fuse (size not listed) | ECU-B: Smart access system with push-button start, front passenger occupant classification system, gauges and meters, outside rear view mirrors, air conditioning system, driving position memory system, electric power steering system, clock |
| 36 | 10A | Fuse (size not listed) | H-LP LH HI: Left-hand headlight (high beam) |
| 37 | 10A | Fuse (size not listed) | H-LP RH HI: Right-hand headlight (high beam) |
| 38 | 10A | Fuse (size not listed) | EFI NO. 2: Multiport fuel injection system/ sequential multiport fuel injection system, exhaust system, key off pump module, electric cooling fans |
| 39 | 10A | Fuse (size not listed) | M-HTR: Outside rear view mirror defoggers |
| 40 | 30A | Fuse (size not listed) | SPARE: Spare fuse |
| 41 | 10A | Fuse (size not listed) | SPARE: Spare fuse |
| 42 | 7.5A | Fuse (size not listed) | SPARE: Spare fuse |
| 43 | 20A | Fuse (size not listed) | EFI MAIN: Multiport fuel injection system/ sequential multiport fuel injection system, cooling system, EFI NO.2 |
| 44 | 10A | Fuse (size not listed) | BATT FAN: Battery cooling fan |
| 45 | 20A | Fuse (size not listed) | IG2: Hybrid system, multiport fuel injection system/sequential multiport fuel injection system, MET, IGN, power management system |
2012 CT left side panel fuses
Left side instrument panel. Tap a row to find it on the diagram.
| No. | Amps | Type | Protects |
|---|---|---|---|
| 1 | 10A | Fuse (size not listed) | TAIL: Headlights (high beam), stop/tail lights, license plate lights, parking lights |
| 2 | 10A | Fuse (size not listed) | PANEL: Audio system, intuitive parking assist switch, windshield wiper de-icer switch, navigation system, fuel filler door opener, glove box light, headlight cleaner switch, emergency flasher switch, air conditioning system, outside rear view mirrors, driving mode select switches, P position switch, instrument panel light control dial, shift position indicators, seat heater switches, heated steering wheel switch, pre-collision braking off switch |
| 3 | 10A | Fuse (size not listed) | IGN: Electronically controlled brake system, smart access system with pushbutton start, multiport fuel injection system/sequential multiport fuel injection system, stop/tail lights, SRS airbags |
| 4 | 7.5A | Fuse (size not listed) | MET: Gauges and meters |
| 5 | 30A | Fuse (size not listed) | WIP: Windshield wipers |
| 6 | 20A | Fuse (size not listed) | RR WIP: Rear window wiper and washer |
| 7 | 15A | Fuse (size not listed) | WASHER: Windshield washer |
| 8 | 10A | Fuse (size not listed) | A/C: Air conditioning system |
| 9 | 10A | Fuse (size not listed) | GAUGE: Windshield wiper de-icer switch, automatic headlight leveling system |
| 10 | 10A | Fuse (size not listed) | ECU-IG NO.2: Windshield wipers, intuitive parking assist, electronically controlled brake system, navigation system, electric power steering system, turn signal lights, emergency flashers, yaw rate and G sensor, headlight cleaner, outside rear view mirrors, driving mode select switches, overhead module, pre-collision seat belts, seat heater switches, heated steering wheel switch, tire pressure warning system, dynamic radar cruise control |
| 11 | 10A | Fuse (size not listed) | ECU-IG NO.1 |
| 12 | 30A | Fuse (size not listed) | S/ROOF: Moon roof |
| 13 | 25A | Fuse (size not listed) | DOOR RL: Power windows |
| 14 | 25A | Fuse (size not listed) | DOOR RR: Power windows |
| 15 | 25A | Fuse (size not listed) | D FR DOOR: Power windows, outside rear view mirrors |
| 16 | 25A | Fuse (size not listed) | P FR DOOR: Power windows, outside rear view mirrors |
| 17 | 10A | Fuse (size not listed) | STOP: Stop/tail lights, electronically controlled brake system, pre-collision system |
| 18 | 7.5A | Fuse (size not listed) | RR FOG: Stop/tail lights |
| 19 | 7.5A | Fuse (size not listed) | FUEL OPEN: Fuel filler door opener |
| 20 | 7.5A | Fuse (size not listed) | OBD: On-board diagnosis system |
| 21 | 30A | Fuse (size not listed) | PWR SEAT: Power seat |
| 22 | 15A | Fuse (size not listed) | FR FOG: Front fog lights |
| 23 | 25A | Fuse (size not listed) | DBL LOCK |
| 24 | 30A | Fuse (size not listed) | PSB: Pre-collision seat belts |
| 25 | 10A | Fuse (size not listed) | STRG HTR: Heated steering wheel |
| 26 | 25A | Fuse (size not listed) | DOOR NO.1: Power door lock system |
| 27 | 10A | Fuse (size not listed) | SEAT HTR FL: Seat heaters |
| 28 | 10A | Fuse (size not listed) | SEAT HTR FR: Seat heaters |
| 29 | 7.5A | Fuse (size not listed) | RAD NO.2: Audio system, navigation system, overhead module |
| 30 | 15A | Fuse (size not listed) | PWR OUTLET: Power outlet (center console) |
| 31 | 10A | Fuse (size not listed) | ECU-ACC: Air conditioning system, outside rear view mirror switches |
| 32 | 15A | Fuse (size not listed) | PWR OUTLET2: Power outlet (auxiliary box) |
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 CT Owner's Manual, "Fuses" section, p. 562 and 566.
Always replace a fuse with one of the same amp rating. If a new fuse blows straight away, the circuit has a fault.