Page Contents:
In this article, you will find information about the fuses of the Lexus RX400H (XU30) (models 2007, 2008, and 2009), including diagrams of the fuse boxes, a list of fuses, their designation, and the location of the fuse blocks within the vehicle.
Checking and Replacing Fuses in Lexus RX 400H
The fuses are designed to blow before the entire wiring harness is damaged. If any of the electrical components do not operate, a fuse may have blown. If this happens, check and replace the fuses as necessary. Replace it with one of an appropriate amperage rating. The amperage rating can be found on the fuse box lid.
If the new fuse immediately blows out, there is a problem with the electrical system. Have your Lexus dealer correct it as soon as possible.
Caution!
- Never use a fuse of a higher amperage rating than indicated, or use any other object in place of a fuse.
- Always use a genuine Lexus fuse or equivalent. Never replace a fuse with a wire, even as a temporary fix. This can cause extensive damage or even fire.
- Do not modify fuses or the fuse box.
- Before replacing the fuses, have the cause of electrical overload determined and repaired by your Lexus dealer.
Location of Fuse Boxes
Engine Compartment:
Push the tabs in and lift the lid off.
Removing the engine compartment cover:
Passenger Compartment:
Remove the lid.
Fuse Box Diagrams
2007-2009
Engine Compartment Fuse Box #1
| № | Fuse | A | CIRCUIT |
|---|---|---|---|
| 1 | ABS MTR2 | 30A | Electronically controlled brake system |
| 2 | ETCS | 10A | Hybrid system |
| 3 | DC/DC-S | 10A | Hybrid system |
| 4 | ABS NO.2 | 10A | Electronically controlled brake system |
| 5 | ABS NO.1 | 10A | Electronically controlled brake system |
| 6 | BATT FAN | 15A | Hybrid system |
| 7 | ABS NO.3 | 15A | Electronically controlled brake system |
| 8 | OIL PUMP | 10A | Transaxle fluid cooling system |
| 9 | ABS MTR1 | 30A | Electronically controlled brake system |
| 10 | ST | 7.5A | Hybrid system |
Engine Compartment Fuse Box #2
| № | Fuse | A | CIRCUIT |
|---|---|---|---|
| 11 | HEATER | 50A | Air conditioning system, “WATER PUMP” fuse |
| 12 | IG1 | 30A | “SEAT HTR” fuse |
| 13 | H-LP CLN | 30A | Headlight cleaner |
| 14 | RR DEF | 40A | Rear window defogger |
| 15 | RDI FAN NO.1 | 40A | Electric cooling fan |
| 16 | DC/DC | 120A | Hybrid system |
| 17 | DRL | 7.5A | Daytime running light system |
| 18 | H-LP L LWR | 15A | Left-hand headlight (low beam) |
| 19 | H-LP L UPR | 15A | Left-hand headlight |
| 20 | H-LP R UPR | 15A | Right-hand headlight (high beam) |
| 21 | PWR OUTLET NO.2 | 20A | Power outlet (115V AC) |
| 22 | TOWING | 30A | Trailer lights |
| 23 | PBD | 30A | Power back door |
| 24 | RDI FAN NO.2 | 40A | Electric cooling fan |
| 25 | HAZ | 15A | Turn signal lights, emergency flashers |
| 26 | MPX-B1 | 7.5A | Electric power steering system |
| 27 | AM2 NO.1 | 30A | “GAUGE NO.2”, “IGN”, “INJ” and “ST” fuses |
| 28 | HORN | 10A | Horns |
| 29 | MAIN | 40A | “H-LP L LWR”, “H-LP L UPR”, “H-LP R LWR”, “H-LP R UPR” and “DRL” fuses |
| 30 | IGCT NO.1 | 50A | “INV W/P”, “IGCT NO.2”, “IGCT NO.3”, “IGCT NO.4” and “IGCT NO.5” fuses |
| 31 | RADIO NO.1 | 15A | Audio system |
| 32 | ECU-B NO.1 | 7.5A | Theft deterrent system, air conditioning system, gauges and meters, moonroof, multiplex communication system |
| 33 | DOME | 7.5A | Personal lights, interior lights, vanity lights, ignition switch light, gauges and meters, navigation system |
| 34 | ECU-B NO.2 | 7.5A | Wireless remote control |
| 35 | AMP | 30A | Audio system |
| 36 | DOOR NO.1 | 25A | Power door lock system |
| 37 | A/F | 25A | Air/fuel control system |
| 38 | CRT | 7.5A | Navigation system screen, rear seat entertainment system |
| 39 | H-LP R LWR | 15A | Right-hand headlight (low beam) |
| 40 | INV W/P | 15A | Hybrid system |
| 41 | IGCT NO.5 | 10A | Hybrid system |
Engine Compartment Fuse Box #3
| № | Fuse | A | CIRCUIT |
|---|---|---|---|
| 42 | WATER PUMP | 10A | Air conditioning system |
| 43 | SEAT HTR | 20A | Seat heaters |
| 44 | IGCT NO.2 | 10A | Hybrid system |
| 45 | IGCT NO.3 | 10A | Hybrid system, fuel pump |
| 46 | IGCT NO.4 | 10A | Emission control system, transaxle control system, air/fuel control system |
Instrument Panel Fuse Box
| № | Fuse | A | CIRCUIT |
|---|---|---|---|
| 47 | RR DOOR RH | 20A | Rear right side power window |
| 48 | RR DOOR LH | 20A | Rear left side power window |
| 49 | FUEL OPN | 7.5A | Fuel filler door opener |
| 50 | FR FOG | 15A | Front fog lights |
| 51 | OBD | 7.5A | On-board diagnosis system |
| 52 | FR DEF | 25A | Windshield wiper de-icer and all components in “MIR HTR” fuse |
| 53 | STOP | 10A | Tail lights, high mounted stoplight, vehicle dynamics integrated management, shift lock control system, multiport fuel injection system/sequential multiport fuel injection system |
| 54 | TI&TE | 30A | Tilt and telescopic steering |
| 55 | MPX-B | 7.5A | Engine immobilizer system |
| 56 | AM1 | 7.5A | Starter system |
| 57 | RR FOG | 7.5A | No circuit |
| 58 | AIR SUS | 7.5A | No circuit |
| 59 | DOOR NO.2 | 25A | Multiplex communication system |
| 60 | S/ROOF | 30A | Moonroof |
| 61 | TAIL | 10A | Front fog lights, instrument cluster lights, instrument panel lights, front side marker lights, tail lights, license plate lights, towing converter |
| 62 | PANEL | 7.5A | Glove box light, instrument cluster lights, instrument panel lights, console box light, audio system, power outlet, garage door opener switch, transmission system, headlight cleaner, seat heaters, steering switches, power back door |
| 63 | ECU-IG NO.1 | 7.5A | Power rear view mirror control, moonroof, multiplex communication system, shift lock control system, multiplex communication system (power door lock system, wireless remote control system), driving position memory system, vehicle dynamics integrated management, windshield wipers, transmission, seat heaters, power seats, tilt and telescopic steering, power back door |
| 64 | ECU-IG NO.2 | 10A | Automatic headlight leveling system, vehicle dynamics integrated management, dynamic laser cruise control, headlight cleaner, adaptive front-lighting system |
| 65 | HEATER | 7.5A | Electric cooling fan, air conditioning system, rear window defogger, ignition switch, windshield wiper de-icer |
| 66 | WASHER | 20A | Windshield washer |
| 67 | SEAT HTR | 20A | No circuit |
| 68 | GAUGE NO.1 | 7.5A | Instrument cluster lights, instrument panel lights, emergency flashers, seat belt, power outlet, multiport fuel injection system/sequential multiport fuel injection system, back-up lights |
| 69 | FR WIP | 30A | Windshield wipers |
| 70 | RR WIP | 15A | Rear window wiper |
| 71 | INJ | 20A | Multiport fuel injection system/sequential multiport fuel injection system |
| 72 | IGN | 10A | SRS airbag system, multiport fuel injection system/sequential multiport fuel injection system, front passenger occupant classification system, stop lights, engine immobilizer system |
| 73 | GAUGE NO.2 | 7.5A | Gauge and meters |
| 74 | ECU-ACC | 7.5A | Navigation system display, power rear view mirror control, shift lock control system, multiplex communication system |
| 75 | CIG | 15A | Power outlet |
| 76 | PWR OUTLET NO.1 | 15A | Power outlet |
| 77 | RADIO NO.2 | 7.5A | Instrument cluster lights, instrument panel lights, navigation system, audio system |
| 78 | MIR HTR | 10A | Outside rear view mirror defogger |
| 79 | PWR | 30A | Power window, multiplex communication system (power door lock system, wireless remote control system), outside rear view mirror |
| 80 | P/SEAT | 30A | Power seats |