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In this article, you will find information about the fuses of the Lexus SC300 & SC400 (Z30) (models 1997, 1998, 1999, and 2000), 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 SC 300 / SC 400
- Turn the ignition switch off and open the fuse box lid. Determine which fuse may be causing the problem. The lid of the fuse box shows the name of the circuit for each fuse.
- Pull the suspected fuse straight out with the pull-out tool and check it.
- Look carefully at the fuse. If the thin wire is broken, the fuse has blown. If you are not sure or if it is too dark to see, try replacing the suspected fuse with one of the same value that you know is good. If it has blown, push a new fuse into the clips. Only install a fuse with the amperage rating designated 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 with a higher amperage rating, or any other object, in place of a fuse. This may cause extensive damage and possibly a fire.
- Always use a genuine Lexus fuse or equivalent for replacement. Never install an ordinary wire – even for a temporary fix. This may cause extensive damage and possibly a fire.
- Before replacing the fuses, have the cause of electrical overload determined and repaired by your Lexus dealer.
Location of Fuse Boxes
Passenger Compartment: Driver’s side kick panel.
Engine Compartment:
Fuse Box Diagrams
1997
Passenger Compartment Fuse Box
| № | Fuse | A | CIRCUIT |
|---|---|---|---|
| 1 | ENGINE | 7.5A | Charging system |
| 2 | HTR | 10A | Air conditioning system, rear window defogger |
| 3 | WIPER | 20A | Windshield wipers and washer |
| 4 | ST | 7.5A | Starting system, cruise control system, multiport fuel injection system/sequential multiport fuel injection system, instrument panel lights |
| 5 | IGN | 7.5A | Discharge warning light, multiport fuel injection system/sequential multiport fuel injection system, SRS airbag system. |
| 6 | PANEL | 7.5A | Instrument panel lights, glovebox light |
| 7 | MIR-HTR | 10A | Outside rear view mirror defogger |
| 8 | TURN | 7.5A | Turn signal lights |
| 9 | STOP | 15A | Stop lights, cruise control system cancel device |
| 10 | CIG | 15A | Cigarette lighter, theft deterrent system, shift lock system, SRS airbag system, instrument panel lights |
| 11 | RADIO NO.2 | 7.5A | Radio, cassette tape player, compact disc player, power antenna, power rear view mirrors |
| 12 | TAIL | 7.5A | Tail lights, parking lights, side marker lights, license plate lights |
| 13 | ECU-IG | 15A | Cruise control system, power steering control system, shift lock system, anti-lock brake system, SRS airbag system, power door lock system, preset steering system, traction control system, electronically controlled hydraulic-driven cooling system, passenger’s seat control system |
| 14 | GAUGE | 10A | Gauges and meters, service reminder indicators and warning buzzers (except discharge and open door warning lights), back-up lights, electronically controlled automatic transmission system, automatic transmission overdrive system, headlight |
| 15 | ECU-B | 15A | SRS airbag system, power rear view mirrors |
| 16 | OBD-II | 7.5A | On-board diagnosis system |
| 17 | FOG | 15A | Fog lights |
| 18 | ST-HTR | 15A | Seat heater |
| 19 | PWR | 30A | Preset steering, electronic moon roof, power windows, theft deterrent system |
| 20 | IG SW | 40A | Starting system |
| 21 | DOOR | 30A | Theft deterrent system, seat control system, fuel opener control system, power door lock system |
Engine Compartment Fuse Box
| № | Fuse | A | CIRCUIT |
|---|---|---|---|
| 22 | DOME | 10A | Interior light, personal lights, door courtesy lights, ignition switch light, open door warning light, trunk light, electronic moon roof system, preset steering system, seat belt reminder system, cruise control system, air conditioning system, inside rear view mirror, door lock and theft deterrent system, foot light, power rear view mirror, locking with wireless remote control system, passenger’s seat control system. |
| 23 | EFI | 30A | Multiport fuel injection system/sequential multiport fuel injection system |
| 24 | HAZ-HORN | 15A | Emergency flashers, horns |
| 25 | RADIO NO.1 | 20A | Radio, cassette tape player, compact disc player, power antenna |
| 26 | TEL | 15A | Telephone |
| 27 | ALT.S | 7.5A | Charging system |
| 28 | TRAC | 7.5A | Traction control system |
| 29 | HEAD.R | 15A | Right-hand headlight (low beam) |
| 30 | HEAD.L | 15A | Left-hand headlight (low beam) |
| 31 | DRL | 7.5A | Vehicles sold in Canada: Daytime Running Light System |
| 32 | HEAD RH-UPR | 15A | Vehicles sold in Canada: Right-hand headlight (high beam) |
| 33 | HEAD LH-UPR | 15A | Vehicles sold in Canada: Left-hand headlight (high beam) |
| 34 | INJ | 30A | Vehicles sold in U.S.A.: Starting system |
1998-2000
Passenger Compartment Fuse Box
| № | Fuse | A | CIRCUIT |
|---|---|---|---|
| 1 | ENGINE | 7.5A | Charging system |
| 2 | HTR | 10A | Air conditioning system, rear window defogger |
| 3 | WIPER | 20A | Windshield wipers and washer |
| 4 | ST | 7.5A | Starting system, cruise control system, multiport fuel injection system/sequential multiport fuel injection system, instrument panel lights |
| 5 | IGN | 7.5A | Discharge warning light, multiport fuel injection system/sequential multiport fuel injection system, SRS airbag system. |
| 6 | PANEL | 7.5A | Instrument panel lights, glovebox light |
| 7 | MIR-HTR | 10A | Outside rear view mirror defogger |
| 8 | TURN | 7.5A | Turn signal lights |
| 9 | STOP | 15A | Stop lights, cruise control system cancel device |
| 10 | CIG | 15A | Cigarette lighter, theft deterrent system, shift lock system, SRS airbag system, instrument panel lights |
| 11 | RADIO NO.2 | 7.5A | Radio, cassette tape player, compact disc player, power antenna, power rear view mirrors |
| 12 | TAIL | 7.5A | Tail lights, parking lights, side marker lights, license plate lights |
| 13 | ECU-IG | 15A | Cruise control system, power steering control system, shift lock system, anti-lock brake system, SRS airbag system, power door lock system, preset steering system, traction control system, electronically controlled hydraulic-driven cooling system, passenger’s seat control system |
| 14 | GAUGE | 10A | Gauges and meters, service reminder indicators and warning buzzers (except discharge and open door warning lights), back-up lights, electronically controlled automatic transmission system, automatic transmission overdrive system, headlight |
| 15 | ECU-B | 15A | SRS airbag system, power rear view mirrors |
| 16 | OBD-II | 7.5A | On-board diagnosis system |
| 17 | FOG | 15A | Fog lights |
| 18 | SEAT-HTR | 15A | Seat heater |
| 19 | PWR | 30A | Preset steering, electronic moon roof, power windows, theft deterrent system |
| 20 | IG SW | 40A | Starting system |
| 21 | DOOR | 30A | Theft deterrent system, seat control system, fuel opener control system, power door lock system |
Engine Compartment Fuse Box
| № | Fuse | A | CIRCUIT |
|---|---|---|---|
| 22 | DOME | 10A | Interior light, personal lights, door courtesy lights, ignition switch light, open door warning light, trunk light, electronic moon roof system, preset steering system, seat belt reminder system, cruise control system, air conditioning system, inside rear view mirror, door lock and theft deterrent system, foot light, power rear view mirror, locking with wireless remote control system, passenger’s seat control system |
| 23 | EFI | 30A | Multiport fuel injection system/sequential multiport fuel injection system |
| 24 | HAZ-HORN | 15A | Emergency flashers, horns |
| 25 | RADIO NO.1 | 20A | Radio, cassette tape player, compact disc player, power antenna |
| 26 | TEL | 15A | Telephone |
| 27 | ALT SENCING | 7.5A | Charging system |
| 28 | ETCS | 7.5A | Traction control system |
| 29 | HEAD (RH-LWR) / HEAD (RH) | 15A | Right-hand headlight (low beam) |
| 30 | HEAD (LH-LWR) / HEAD (LH) | 15A | Left-hand headlight (low beam) |
| 31 | DRL | 7.5A | Daytime Running Light System |
| 32 | HEAD (RH-LPR) | 15A | Right-hand headlight (high beam) |
| 33 | HEAD (LH-LPR) | 15A | Left-hand headlight (high beam) |
| 34 | INJ | 30A | SC 300: Starting system |