Lexus RX 450h 2012 Fuse Box Info
Passenger compartment fuse box location:
The fuse box is located under the instrument panel on the driver’s side.
Engine compartment fuse box location:
Luggage compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box:
| Fuse/Relay N° and Name | Rating | Functions |
| 1. P/POINT | 15A | Power outlet |
| 2. ECU-ACC | 10A | Navigation system, outside rear view mirror, multiplex communication system, multi-information display, head-up display |
| 3. CIG | 15A | Power outlet |
| 4. RADIO NO. 2 | 7.5A | Audio system, power outlet |
| 5. GAUGE NO. 1 | 10A | Emergency flashers, navigation system, head-up display |
| 6. ECU-IG1 NO. 3 | 10A | Outside rear view mirror, windshield wipers and washer, seat heaters, starter system, power outlet, moon roof |
| 7. ECU-IG1 NO. 1 | 10A | Multiplex communication system, electric power steering system, shift lock control system, tilt and telescopic steering, starter system, hybrid transmission system, power back door, hybrid system, tire pressure warning system |
| 8. S/ROOF | 30A | Moon roof |
| 9. FUEL OPN | 7.5A | Fuel filler door opener |
| 10. PSB | 30A | Pre-collision seat belt |
| 11. TI & TE | 30A | Tilt and telescopic steering system |
| 12. DR LOCK | 10A | Power door lock system |
| 13. FR FOG | 15A | - |
| 14. P-SEAT LH | 30A | Power seat (left-side) |
| 15. INVERTER | 20A | - |
| 16. RR FOG | 7.5A | - |
| 17. D/L ALT B | 25A | Multiplex communication system |
| 18. HEATER | 10A | Air conditioning system |
| 19. ECU-IG1 NO. 2 | 10A | Air conditioning system, multiport fuel injection system/sequential multiport fuel injection system, SRS airbag system, multi-information display, capacitor |
| 20. PANEL | 10A | Switch illumination, navigation system, height control system, headlight cleaner, windshield wiper de-icer, seat heater, power back door, audio system, multi-information display, air conditioning system |
| 21. TAIL | 10A | Position lights, tail lights, license plate lights, towing converter |
| 22. AIR SUS | 20A | Electronically modulated air suspension system |
| 23. P-SEAT RH | 30A | Power seat (right-side) |
| 24. OBD | 7.5A | On-board diagnosis |
| 25. FR DOOR | 25A | Front power window (right-side) |
| 26. RR DOOR | 25A | Rear power window (right-side) |
| 27. FL DOOR | 25A | Front power window (left-side) |
| 28. RL DOOR | 25A | Rear power window (left-side) |
| 29. FR WASH | 25A | Windshield wipers and washer |
| 30. RR WIP | 15A | Windshield wipers and washer |
| 31. RR WASH | 20A | Windshield wipers and washer |
| 32. FR WIP | 30A | Windshield wipers and washer |
| 33. ECU IG2 | 10A | Starter system, intuitive parking assistsensor, AWD system |
| 34. GAUGE NO. 2 | 7.5A | Starter system |
| 35. RH S-HTR | 15A | Seat heater (right-side) |
| 36. LH S-HTR | 15A | Seat heater (left-side) |
Engine compartment fuse box A:
| Fuse/Relay N° and Name | Rating | Functions |
| 1. PCU | 15A | Hybrid system |
| 2. IGCT NO. 2 | 10A | Hybrid system |
| 3. IGCT NO. 3 | 10A | Hybrid system |
| 4. INV W/P | 10A | Hybrid system |
Engine compartment fuse box B:
| Fuse/Relay N° and Name | Rating | Functions |
| 1. SPARE | 120A | - |
| 2. RR DEF | 50A | Rear window defogger |
| 3. AIR SUS | 50A | Electronically modulated air suspension system |
| 4. HTR | 50A | Air conditioning system |
| 5. ECB NO. 1 | 50A | Brake system, vehicle stability control, vehicle dynamics integrated management, meters and gauges |
| 6. RDI FAN NO. 1 | 40A | Electric cooling fans |
| 7. RDI FAN NO. 2 | 40A | Electric cooling fans |
| 8. H-LP CLN | 30A | Headlight cleaner |
| 9. PBD | 30A | Power back door system |
| 10. HV R/B NO. 1 | 30A | PCU, IGCT NO. 2, IGCT NO. 3, INV W/P |
| 11. PD | 50A | 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. ECB NO. 2 | 50A | Brake system |
| 13. HV R/B NO. 2 | 80A | ECB MAIN 1, ECB MAIN 2, A/C W/P, BATT FAN, OIL PMP |
| 14. DCDC | 150A | FUEL OPN, DR LOCK, OBD, RR FOG, S/ROOF, INVERTER, ECU-IG1 NO. 1, ECU-IG1 NO. 2, PANEL, GAUGE NO. 1 |
| 15. AMP1 | 30A | Audio system |
| 16. EFI MAIN | 30A | Multiport fuel injection system/sequential multiport fuel injection system, EFI NO. 2 |
| 17. AMP2 | 30A | Audio system |
| 18. IG2 MAIN | 30A | Starter system, IGN, GAUGE NO. 2, ECU IG2 |
| 19. IP JB | 25A | Power door lock system |
| 20. STR LOCK | 20A | Starter system |
| 21. RAD NO. 3 | 15A | Meters and gauges, instrument panel lights, navigation system, audio system |
| 22. HAZ | 15A | Emergency flashers |
| 23. ETCS | 10A | Multiport fuel injection system/sequential multiport fuel injection system |
| 24. RAD NO. 1 | 10A | Audio system |
| 25. AM2 | 7.5A | Starter system |
| 26. ECU-B NO. 2 | 7.5A | Air conditioning system, front passenger occupant classification system, starter system, electric power steering system |
| 27. MAYDAY/TEL | 7.5A | MAYDAY/TEL |
| 28. IMMOBI | 7.5A | - |
| 29. ECB MAIN NO. 3 |
15A | Brake system |
| 30. IGN | 10A | Multiport fuel injection system/sequential multiport fuel injection system, brake system, SRS airbag system |
| 31. DOME | 10A | Vanity mirror lights, luggage compartment lights, interior lights, personal lights |
| 32. ECU-B NO. 1 | 10A | Interior lights, personal lights, tilt and telescopic steering, multiplex communication system, meters and gauges, power windows, driving position memory system, power seats, power back door, head-up display, starter system, air conditioning system, power door lock system |
| 33. EFI NO. 1 | 10A | Multiport fuel injection system/sequential multiport fuel injection system |
| 34. WIP-S | 7.5A | Windshield wipers and washer |
| 35. AFS | 7.5A | Adaptive front-lighting system |
| 36. BK/UP LP | 7.5A | Back-up lights |
| 37. HEATER NO. 2 | 7.5A | Air conditioning system, AWD system |
| 38. ECU IG1 | 10A | Adaptive front-lighting system, headlight cleaner, cooling fan, cruise control, electronically modulated air suspension system, vehicle stability control, vehicle dynamics integrated management, brake system |
| 39. EFI NO. 2 | 10A | Multiport fuel injection system/sequential multiport fuel injection system |
| 40. F/PMP | 15A | Multiport fuel injection system/sequential multiport fuel injection system |
| 41. DEICER | 25A | Windshield wipers and washer |
| 42. STOP | 7.5A | Vehicle stability control, vehicle dynamics integrated management, high mounted stoplight |
| 43. TOWING BATT | 20A | Trailer battery |
| 44. TOWING | 30A | Trailer lights |
| 45. FILTER | 10A | Condenser |
| 46. IG1 MAIN | 30A | ECU IG1, BK/UP LP, HEATER NO. 2, AFS |
| 47. H-LP RH HI | 15A | Right-hand headlight (high beam) |
| 48. H-LP LH HI | 15A | Left-hand headlight (high beam) |
| 49. BIXENON | 10A | Discharge headlight |
| 50. H-LP RH LO | 15A | Right-hand headlight (low beam) |
| 51. H-LP LH LO | 15A | Left-hand headlight (low beam) |
| 52. HORN | 10A | Horn |
| 53. A/F | 20A | Multiport fuel injection system/sequential multiport fuel injection system |
| 54. S-HORN | 7.5A | Security horn |
Engine compartment fuse box C:
| Fuse/Relay N° and Name | Rating | Functions |
| 1. ECB MAIN NO. 1 | 10A | Brake system |
| 2. ECB MAIN NO. 2 |
10A | Brake system |
| 3. BATT FAN | 15A | Battery cooling fan |
| 4. OIL PMP | 10A | Hybrid system |
| 5. A/C W/P | 10A | Air conditioning system |
Luggage compartment fuse box A:
| Fuse/Relay N° and Name | Rating | Functions |
| 1. DCDC-S | 7.5A | Hybrid system |
| 2. CAPACITOR | 10A | Hybrid system |
Luggage compartment fuse box B:
| Fuse/Relay N° and Name | Rating | Functions |
| 1. MAIN | 180A | All electrical components |
| 2. RR-B | 50A | CAPACITOR, DCDC-S |
| 3. EPS | 80A | Electric power steering system |
