The Lexus UX is a premium compact crossover vehicle available in 2018, 2019, 2020, 2020, 2021, 2022, 2023, 2024, 2025, 2026, 2027 with different engine types such as 200, 250h, 260h, and 300e. During this time, the model received a restyling. In our publication you can find a description of fuses and relays Lexus UX with fuse block diagrams, their locations and photo examples of performance. Note the fuse responsible for the cigarette lighter.
Designation of fuses and relays, as well as their location in the blocks may differ from the presented and depends on the year of manufacture, region of delivery and the level of electrical equipment of your vehicle.
Passenger compartment
In the vehicle interior, the fuse box is located on the left side under the instrument panel. The protective cover must be removed for access.
RHD
Photo for example.
Diagram
Type 1
Type 2
Assignment
- 7.5A FOG RR – Rear Fog Lights
- 7.5A OBD – On-Board Diagnostics
- 7.5A DOME – Interior lighting and illumination
- 10/5A ECU-DCC – Engine Control Unit
- 15A RADIO – Radio and audio system
- 20A DOOR R/R – Rear Right Door
- 10A STRG LOCK – Steering lock
- 5A ECU-ACC – Engine Control Unit
- 7.5A ECU-IG1 – Engine control unit
- 5A EPS-IG1 – Electric Power Steering Unit
- 10A A/BAG-IG2 – Airbag
- 5A METER-IG2 – Measuring instruments
- 5A ECU-IG2 – Engine Control Unit
- 10/5A ECU-B – Engine Control Unit
- 20A D/L – Door locking system
- 7.5A STOP – Stop Signals
- 7.5A AM2 – Starting System
- 10A HAZ – Emergency alarm system
- 5A PANEL – Instrument panel
- 10A TAIL – Lights, instrument and license plate illumination
- 20A DOOR – Doors
- 20A DOOR R/L – Rear Left Door
- 15A P/OUTLET 1 – Auxiliary power outlet (cigarette lighter)
- 5A SFT LOCK-ACC – Transmission selector lock
- 15A WASHER – Washer
- 15A WIPER – Cleaner
- 7.5A BKUP LP – Reverse lights, Audio system, Monitor, Navigation
The fuse labeled P/OUTLET is responsible for the cigarette lighter.
In the upper part of the block can be installed 30A fuses responsible for the power window elevators (POW) and power seats (P/SEAT) and sunroof (S/ROOF).
Engine compartment
Main fuse box
Under the hood in the engine compartment on the left side there is the main block with fuses and relays.
Type 1
Check the element assignments against your schematics on the back of the cover.
Diagram
Designation
| ABS MTR NO.1 | 50A ABS, Brake Hold System, Electric Parking Brake, Hill Start Assist, TRC, VSC |
| ABS-MAIN | 30A ABS, Brake holding system, Electric parking brake, Hill start assist, TRC, VSC |
| AMP NO.1 | 20A Audio system, navigation system, rear view monitoring system |
| AMP NO.2 | 20A Audio system, navigation system, rear view monitoring system |
| BATT-S | 5A Charging, stop and start system |
| BBC NO.1 | 30A Stop and start system |
| BBC NO.2 | 30A Stop and start system |
| D INJ | 20A Cruise control, CVT and gear shift indicator, engine management |
| D/C CUT | 30A Power supply |
| DCM/MAYDAY | 7.5A Telematics system |
| DEF | 50A Mirror heater, rear window defroster |
| DEICER | 15A Front window defroster |
| DOOR DBL/L | 20A Double lock, double locking system |
| DRL | 10A Headlights, headlight level control |
| ECU-B NO.3 | 7.5A Cruise control, CVT and shift indicator, engine management |
| ECU-IG2 NO.1 | 10A Cruise control, CVT and gearshift indicator, engine management |
| EFI NO.2 | 10A Cooling fan |
| EFI NO.2 | 15A Cooling fan, Cruise control, CVT and shift indicator, engine management |
| EFI NO.3 | 10A Cruise control, CVT and gearshift indicator, engine management, stop and start system |
| EFI NO.4 | 10A Cruise control, CVT and shift indicator, engine management |
| EFI-MAIN NO.1 | 20A Cooling fan, cruise control, CVT and shift indicator, dynamic radar Cruise control, engine management, stop and start system |
| EFI-MAIN NO.1 | 30A Cooling fan, cruise control, CVT and gear shift indicator, engine management |
| EFI-MAIN NO.2 | 30A Cruise control, CVT and shift indicator, engine management |
| EPS | 80A EPS |
| ETCS | 10A Cruise control, CVT and gear shift indicator, dynamic radar cruise control, engine management |
| FAN NO.1 | 30A Cooling fan |
| FAN NO.2 | 30A Cooling fan |
| FOG FR | 10A Front fog lights |
| FUEL OPN | 10A Fuel filler flap opener |
| H-LP CLN | 30A Headlamp cleaner |
| H-LP HI | 7.5A Headlamp, headlamp light level control |
| H-LP LH | 10A Automatic light control, headlight, headlight level control, headlight cleaner, automatic light switch-off system, light reminder |
| H-LP LH | 20A Automatic light control, headlamp, headlamp level control, headlamp cleaner, lighting, automatic light switch-off system, light reminder, tail lamp, direction indicator and hazard warning signal |
| H-LP RH | 10A Headlamp, headlamp beam level control |
| H-LP RH | 20A Headlamp, headlamp beam level control, illumination, tail lamp, direction indicator and hazard warning signal |
| H-LP SHADE | 7.5A Headlamp, headlamp beam level control |
| HORN | 10A Siren, anti-theft protection |
| HTR | 40A Automatic air conditioner |
| HTR | 50A Automatic air conditioner, manual air conditioner |
| IG2-MAIN | 25A Power supply |
| IGN | 15A Ignition |
| IGN/INJ | 20A Combination meter, cruise control, CVT and gear shift indicator, engine management, ignition |
| J/B-B | 50A Power supply |
| MIR HTR | 10A Heated mirrors, rear window defroster |
| PTC HTR NO.1 | 50A Automatic air conditioner, manual air conditioner |
| PTC HTR NO.2 | 30A Automatic air conditioner, manual air conditioner |
| PTC HTR NO.3 | 30A Automatic air conditioner, manual air conditioner |
| S/HTR F/L | 15A Seat heater |
| S/HTR F/R | 15A Seat heater |
| S/HTR-MAIN | 30A Seat heater, seat heater |
| S-HORN | 7.5A Anti-theft protection |
| ST | 30A Access and start system, immobiliser, start, steering wheel lock, stop and start system, wireless door lock control |
| STRG HTR | 15A Steering wheel heating system |
| TOWING-ALT | 30A Auxiliary connector (trailer towing) |
| TOWING-B | 30A Auxiliary connector (trailer towing) |
| VLVMATIC | 30A Cruise control, CVT and gear shift indicator, engine management |
| WASHER-S | 5A Headlamp cleaner |
| WIPER | 30A Front windscreen wiper and washer |
| WIPER-S | 5A Cruise control, CVT and gearshift indicator, engine management |
Type 2
Photo for example
Diagram
Allocation
| 1 | ABS NO.2: Anti-lock Brake System (Module 2) |
| 2 | ABS NO.3: Anti-lock Brake System (Module 3) |
| 3 | S-HORN: Horn |
| 4 | EFI NO.1: Fuel Injection System (Module 1) |
| 5 | TV NO.2: Television System (Module 2) |
| 6 | DRL: Daytime Running Lights |
| 7 | H-LP SHADE: Headlight Dimming |
| 8 | HORN: Horn |
| 9 | D INJ: Direct Fuel Injection |
| 10 | IG2-MAIN: Main Ignition Circuit (Module 2) |
| 11 | ABS-MAIN: Main Anti-lock Brake System Circuit |
| 12 | H-LP RH [w/o Headlight ECU Sub-Assembly]: Right Headlight (without Headlight ECU) |
| 12 | H-LP RH [w/ Headlight ECU Sub-Assembly]: Right Headlight (with Headlight ECU) |
| 13 | H-LP LH [w/o Headlight ECU Sub-Assembly]: Left Headlight (without Headlight ECU) |
| 13 | H-LP LH [w/ Headlight ECU Sub-Assembly]: Left Headlight (with Headlight ECU) |
| 14 | VVT: Variable Valve Timing |
| 15 | EFI-MAIN NO.3: Main Fuel Injection System Circuit (Module 3) |
| 16 | INV W/PMP: Water Pump Inverter |
| 17 | AMP: Audio Amplifier |
| 18 | EPS: Electric Power Steering |
| 19 | ABS MTR NO.3: Anti-lock Brake System Motor (Module 3) |
| 20 | D/C CUT: Direct Current Cutoff |
| 23 | TV: Television System |
| 24 | FUEL OPN: Fuel Tank Opening |
| 28 | EFI-MAIN NO.1: Main Fuel Injection System Circuit (Module 1) |
| 29 | EFI-MAIN NO.2: Main Fuel Injection System Circuit (Module 2) |
| 30 | WIPER: Windshield Wipers |
| 31 | EPB NO.1: Electronic Parking Brake (Module 1) |
| 32 | DC/DC: DC/DC Converter |
| 33 | ABS MTR NO.1: Anti-lock Brake System Motor (Module 1) |
| 34 | ABS MTR NO.2: Anti-lock Brake System Motor (Module 2) |
| 35 | J/B-B: Junction Block (B) |
| 39 | PBD: Power Back Door |
| 40 | FOG FR: Front Fog Lights |
| 41 | ECU-ACC NO.3: Accessory Control Unit (Module 3) |
| 42 | DEICER: Window De-icer |
| 43 | STRG HTR: Steering Wheel Heater |
| 46 | S/HTR-MAIN: Main Seat Heater Circuit |
| 48 | FAN NO.1: Cooling Fan (Module 1) |
| 49 | J/B-AM: Junction Block (AM) |
| 50 | ECU-ACC NO.2: Accessory Control Unit (Module 2) |
| 51 | ECU-IG1 NO.5: Ignition Control Unit (Module 5) |
| 52 | AVS: Adaptive Variable Suspension |
| 53 | P/OUTLET NO.2: Power Outlet (Module 2) |
| 55 | FAN NO.2: Cooling Fan (Module 2) |
| 56 | DEF: Rear Window Defogger |
| 57 | H-LP CLN: Headlight Cleaner |
| 59 | HTR: Cabin Heater |
| 62 | IGN: Ignition |
| 63 | ECU-IG2 NO.1: Ignition Control Unit (Module 1) |
| 64 | EFI NO.3: Fuel Injection System (Module 3) |
| 65 | EFI NO.2: Fuel Injection System (Module 2) |
| 68 | MIR HTR: Mirror Heater |
| 71 | EFI NO.4: Fuel Injection System (Module 4) |
| R1 | EFI-MAIN NO.2: Main Fuel Injection System Relay (Module 2) |
| R2 | HORN: Horn Relay |
| R3 | INV W/PMP: Water Pump Inverter Relay |
| R4 | D INJ: Direct Fuel Injection Relay |
| R5 | EFI-MAIN NO.3: Main Fuel Injection System Relay (Module 3) |
| R6 | DEF: Rear Window Defogger Relay |
| R7 | EFI-MAIN NO.1: Main Fuel Injection System Relay (Module 1) |
| R8 | S-HORN: Horn Relay |
Additional fuse box
This unit can be installed on the other side of the engine compartment.
Diagram
Appointment
- AL: Alternator (alternator)
- S/HTR FR: Seat heater (front)
- PTC NO.1: Temperature control (module 1)
- HTR: Heater (heater)
- DEICER: Window heater (defroster)
- H-LP CLN: Headlamp cleaner
- S/HTR: Seat heater
- AVS: Adaptive suspension
- HTR NO.2: Heater (module 2)
- WIPER: Windshield wipers
- H-LP SHADE: Headlamp dimming.
On the plus terminal of the battery there is a high-power fuse block in the form of fusible links.
- 140A BATT – Power supply, alternator
- 120A DC/DC – Cruise control, hybrid system, shift control system
- EPS 80A – EPS
- 60A J/B-AM – Automatic light control, front fog lamp, headlight level control, lighting, automatic light off system, light reminder, rear fog lamp, tail lamp
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