Lexus GS450h (2014) – fuse box diagram
Year of production: 2014
Engine compartment
| Fuse | Ampere rating [A] | Circuit protected | |
| 1 | IGN | 10 | Starting system |
| 2 | INJ | 10 | Multiport fuel injection system/sequential multiport fuel injection system |
| 3 | EFI NO.2 | 10 | Air intake system, exhaust system |
| 4 | IG2 MAIN | 20 | IGN, GAUGE, INJ, AIR BAG, IG2 NO.1, LH-IG2 |
| 5 | EFI MAIN | 25 | Multiport fuel injection system/sequential multiport fuel injection system, EFI NO.2 |
| 6 | A/F | 15 | Air flow sensor |
| 7 | EDU | 20 | Multiport fuel injection system/sequential multiport fuel injection system |
| 8 | F/PMP | 25 | Multiport fuel injection system/sequential multiport fuel injection system |
| 9 | H-LP RH-LO | 20 | Right-hand headlight (low beam)* |
| 10 | H-LP LH-LO | 20 | Left-hand headlight (low beam)* |
| 11 | ABS MAIN 2 | 10 | Brake system |
| 12 | ABS MAIN 1 | 10 | Brake system |
| 13 | IGCT NO.1 | 30 | IGCT NO.2, IGCT NO.3, IGCT NO.4, IGCT NO.5 |
| 14 | ECU-B | 7,5 | Smart access system with push-button start |
| 15 | INV W/P | 10 | Hybrid system |
| 16 | ETCS | 10 | Multiport fuel injection system/sequential multiport fuel injection system |
| 17 | EPS-B | 10 | Electric power steering system |
| 18 | D/C CUT | 30 | DOME, MPX-B |
| 19 | HORN | 10 | Horn |
| 20 | ODS | 5 | Occupant classification system |
| 21 | TV | 7,5 | Remote Touch screen |
| 22 | P/I-B NO.2 | 80 | IG2 MAIN, EFI MAIN, EDU, F/PMP, A/F |
| 23 | ABS NO.2 | 30 | Motor relay |
| 24 | P/I-B NO.1 | 50 | H-LP HI RH, H-LP HI LH, DRL |
| 25 | H-LP LO | 30 | H-LP LO RH, H-LP LO LH |
| 26 | LH J/B-B | 40 | Left-hand junction block |
| 27 | RH J/B-B | 40 | Right-hand junction block |
| 28 | VGRS | 40 | No circuit |
| 29 | OIL PMP | 60 | Oil pump |
| 30 | IGCT NO.5 | 7,5 | Power management system, shift position sensor |
| 31 | WIP-S | 7,5 | Windshield wipers, driver support system |
| 32 | WASH-S | 5 | Windshield washer, driver support system |
| 33 | COMB SW | 5 | Windshield wipers |
| 34 | DOME | 7,5 | Personal lights, ornament lights, trunk light, footwell lights, door courtesy lights, vanity lights, rear door inside handle illuminations, power trunk opener and closer |
| 35 | MPX-B | 10 | Body ECU, smart access system with pushbutton start, electric tilt and telescopic steering column, power seats, head-up display, front door ECU, gauges and meters, steering sensor, yaw rate and G sensor, overhead module, RR CTRL SW, power trunk opener and closer, clock, CAN gateway ECU |
| 36 | IGCT NO.4 | 10 | Power control unit |
| 37 | IGCT NO.3 | 7,5 | Hybrid battery (traction battery), DC/DC converter |
| 38 | IGCT NO.2 | 5 | Hybrid system |
| 39 | IG2 NO.1 | 5 | DCM, CAN gateway ECU |
| 40 | GAUGE | 5 | Gauges and meters |
| 41 | DC/DC | 150 | RH-J/B DC/DC, P/I DC/DC |
| 42 | P/I DC/DC | 100 | RR S/SHADE, DEFOG, FOG, TAIL, PANEL |
| 43 | RH J/B DC/DC | 80 | Right-hand junction block |
| 44 | LH J/B DC/DC | 50 | Left-hand junction block |
| 45 | H-LP CLN | 30 | Headlight cleaner |
| 46 | FAN NO.2 | 40 | Electric cooling fans |
| 47 | LUG J/B DC/DC | 80 | Luggage compartment junction block |
| 48 | FAN NO.1 | 80 | Electric cooling fans |
| 49 | PTC NO.1 | 50 | PTC heater |
| 50 | PTC NO.2 | 50 | PTC heater |
| 51 | HTR | 50 | Air conditioning system |
| 52 | ABS NO.1 | 30 | Motor relay |
| 53 | ECU-B NO.2 | 7,5 | No circuit |
| 54 | DEICER | 25 | Windshield wiper de-icer |
| 55 | ABS MAIN 3 | 10 | Brake system |
| 56 | FILTER | 10 | Condenser |
| 57 | A/C W/P | 7,5 | Air conditioning system |
| 58 | SPARE | 10 | Spare fuse |
| 59 | SPARE | 30 | Spare fuse |
| 60 | SPARE | 20 | Spare fuse |
| *: Low beam and high beam are the same bulb. (vehicles with discharge headlights) | |||
Driver’s side instrument panel
| Fuse | Ampere rating [A] | Circuit protected | |
| 1 | STOP | 7,5 | Stop lights, high mounted stoplight |
| 2 | P/W-B | 5 | Power window master switch |
| 3 | P/SEAT1 F/L | 30 | Power seats |
| 4 | D/L NO.1 | 25 | Power door lock system |
| 5 | NV-IR | 10 | Lexus night view |
| 6 | FL S/HTR | 10 | Seat heaters/ventilators |
| 7 | WIPER | 30 | Windshield wipers |
| 8 | WIPER-IG | 5 | Windshield wipers |
| 9 | LH-IG | 10 | Seat belts, body ECU, AFS, overhead module, raindrop sensor, inside rear view mirror, lane camera sensor (LKA), head-up display, shift lock system, intuitive parking assist, front left-hand door ECU, driver monitor system, Remote Touch screen, electric tilt and telescopic steering column, power seats, moon roof, windshield wiper de-icer, intuitive parking assist switch, PTC heater, headlight cleaner |
| 10 | LH ECU-IG | 10 | VDIM, brake system, D-SW MODULE (Blind Spot Monitor, heated steering wheel), driver support system, AFS, electric cooling fans, EPB, air conditioning system, steering sensor |
| 11 | DOOR FL | 30 | Outside rear view mirror defoggers, power window (front left-hand) |
| 12 | CAPACITOR (HV) | 10 | Capacitor |
| 13 | STRG LOCK | 15 | Steering lock system |
| 14 | D/L NO.2 | 25 | Power door lock system |
| 15 | DOOR RL | 30 | Power window (rear left-hand) |
| 16 | HAZ | 15 | Turn signal lights, emergency flashers |
| 17 | LH-IG2 | 10 | Multiport fuel injection system/sequential multiport fuel injection system, stop lights, smart access system with push-button start, steering lock system, brake system, power management system |
| 18 | LH J/B-B | 7,5 | Body ECU |
| 19 | S/ROOF | 20 | Moon roof |
| 20 | P/SEAT2 F/L | 25 | Power seats |
| 21 | TI & TE | 20 | Electric tilt and telescopic steering column |
| 22 | A/C | 7,5 | Air conditioning system |
Passenger’s side instrument panel
| Fuse | Ampere rating [A] | Circuit protected | |
| 1 | P/SEAT1 F/R | 30 | Power seats |
| 2 | FR P/OUTLET | 15 | Power outlet (front) |
| 3 | RR P/OUTLET | 15 | Power outlet (rear) |
| 4 | P/SEAT2 F/R | 25 | Power seats |
| 5 | AVS | 20 | AVS |
| 6 | STRG HTR | 15 | Heated steering wheel |
| 7 | WASH | 20 | Windshield washer |
| 8 | RH ECU-IG | 10 | Navigation system, pre-collision seat belts, air conditioning system, brake system, Lexus night view, yaw rate and G sensor, capacitor |
| 9 | RH-IG | 10 | Tension reducer, seat heater/ventilator switches, front right-hand door ECU, CAN gateway ECU, tire pressure warning system, power seats |
| 10 | DOOR FR | 30 | Front right-hand door control system (outside rear view mirror defoggers, power window |
| 11 | DOOR RR | 30 | Power window (rear right-hand) |
| 12 | RAD NO.2 | 30 | Audio system |
| 13 | AM2 | 7,5 | Power management system |
| 14 | MULTIMEDIA | 10 | Navigation system, Remote Touch |
| 15 | RAD NO.1 | 30 | Audio system |
| 16 | AIR BAG | 10 | SRS airbag system, occupant classification system |
| 17 | OBD | 7,5 | On-board diagnosis system |
| 18 | ACC | 7,5 | Body ECU, head-up display, RR CTRL, navigation system, hybrid transmission, Remote Touch, DCM, Remote Touch screen, clock |
Trunk
| Fuse | Ampere rating [A] | Circuit protected | |
| 1 | PSB | 30 | Pre-collision seat belts |
| 2 | PTL | 25 | Power trunk opener and closer |
| 3 | RR J/B-B | 10 | Smart access system with push-button start |
| 4 | RR S/HTR | 20 | Seat heaters (rear) |
| 5 | FR S/HTR | 10 | Seat heaters/ventilators (front) |
| 6 | RR FOG | 10 | No circuit |
| 7 | DC/DC-S (HV) | 7,5 | DC/DC converter |
| 8 | BATT FAN (HV) | 20 | Hybrid battery (traction battery) cooling fan system |
| 9 | SECURITY | 7,5 | SECURITY |
| 10 | ECU-B NO.3 | 7,5 | Parking brake |
| 11 | TRK OPN | 7,5 | Power trunk opener and closer, trunk open motor |
| 12 | DCM (HV) | 7,5 | DCM |
| 13 | AC INV (HV) | 20 | Power outlet (120V AC) |
| 14 | RR-IG1 | 5 | Radar sensor, Blind Spot Monitor |
| 15 | RR ECU-IG | 10 | Power trunk opener and closer, parking brake, tension reducer (rear left-hand), RR CTRL SW, tire pressure warning system |
| 16 | EPS-IG | 5 | Electric power steering system |
| 17 | BACK UP | 7,5 | Back-up lights |
The upper part of the 12-volt battery*
| Fuse | Ampere rating [A] | Circuit protected | |
| 1 | EPB | 30 | Parking brake |
| 2 | LUG-J/B BATT | 40 | Luggage compartment junction block |
| 3 | EPS | 80 | Electric power steering |
| 4 | ARS | 80 | No circuit |
| 5 | MAIN | 220 | Engine compartment junction block |
| *: When one or more of the fuses in this unit are blown, the unit needs to be replaced as a whole. | |||
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
