Lexus RX300 (1997 – 2003) fuse and relay

Lexus RX300 1st generation was produced in 1997, 1998, 1999, 2000, 2001, 2002 and 2003 with designation XU10. In this publication you can find a description of fuses and relays Lexus RX 300 with fuse box diagrams and their locations. We will highlight the fuse responsible for the cigarette lighter.

LX300 1G

Passenger compartment

General layout of boxes in the cabin


Fuse box

It is located at the bottom of the dashboard behind the protective cover on the driver’s side.




Protected components

17,5A IGN – Electronic engine control unit
27,5A RADIO No. 2 – Audio system
315A CIG – Cigarette lighter, electric side mirrors
420A PRR DOOR – Power window regulator, rear left door
515A PWR OUTLET – Socket for connecting additional equipment
615A FR FOG – Front fog lights
715A SRS – Airbag System (SRS)
815A ECU-IG – ABS, TRC Systems
925A WIPER – Arm and windshield wiper blade
1020A D RR DOOR – Power window regulator, rear right door
1120A D FR DOOR – Power window regulator, driver’s door, central locking
1220A S / ROOF – Hatch
1315A HEATER – Air conditioning and heater, rear door glass heater
147,5A GAUGE – Instrument Cluster
1515A RR WIP – Lever and blade for rear door glass wiper
1620A STOP – Stop lights
177,5A OBD – Electronic engine control unit
187,5A STARTER – Starter
(18)*15A SEAT HTR – Heated seats
1910А WASHER – Window washer
(19)*7,5А STARTER – Starter
207.5A RR FOG – Rear fog lamps
(20)*10А WASHER – Window washer
2120A FR DEF – De-icer for windscreen wiper blades
(21)*7.5A RR FOG – Rear fog lamps
227.5A SRS-B – Airbag System (SRS)
(22)*20A FR DEF – De-icer for windscreen wiper blades
2310A TAIL – Front and rear dimensions, license plate light
247,5А PANEL – Illumination of switches and switches

* – Models from 11/2000 model year.

For the cigarette lighter, fuses 3 and 5 are responsible for 15A.

Fuses are attached separately at the bottom: 40A AM1 – Ignition, 30A POWER – Seat drive.

On the back side of the block there are relay elements.


Relay diagram


A – Side light relay
B – Fog lamp relay
C – Power supply relay (“ACC”)
D – Brush defroster relay
E – Rear fog lamp relay

Engine compartment

Fuse and relay box

Located on the left side of the engine compartment, next to the battery.

Photo 2

Check the purpose of the elements with your diagrams on the box cover.

covery 1


Diagram 2


160A ABS – ABS
2140A ALT – Charging system
340A RDI FAN – Cooling fan
440A CDS FAN – Cooling fan
530A RR DEF – Heated tailgate glass and outside mirrors
650A HEATER – Heater fan
715A H – LP R UPR – Right headlight, high beam
815A H – LP L UPR – Left headlight, high beam
925A A / F HTR – Mixture quality sensor
10 11
1215A H – LP R LWR – Right headlight, low beam
1315A H – LP L LWR – Left headlight, low beam
1415A HAZARD – Hazard warning system, direction indicators
1520A AM 2 – Starting system
1620A TEL – Phone
197,5A ALT – S – Charging system
2010A HORN – Anti-theft system, horn
2120A EFI – Fuel Injection
2210A DOME – Interior lighting, indicators and meters, multifunction display
237,5A ECU – B – On-board computer
2420A RAD No. 1 – Audio system
25 26 27
2850A MAIN – Starting system

Relay decoding

  • A – None
  • B – Relay ABS SOL
  • C – Fan relay No. 3
  • D – Fan relay No. 1
  • E – Relay e / motor ABS
  • F – Fan relay No. 2
  • G – A / F sensor relay
  • H – Absent
  • I – Headlight relay
  • J – Starter relay
  • K – Relay for heating the glass of the tailgate and outside mirrors
  • L – Relay of the magnetic clutch К / В
  • M – Horn and anti-theft system relay
  • N – Fuel injection relay

Relay box 1


Diagram relay box


  • A – Open circuit relay
  • B – Main motor relay
  • C – Heated exterior mirrors relay

Relay box 2


Relay 2


  • 1 – 7.5A Daytime running light fuse (DRL)
  • A – Relay No. 2 DRL
  • B – Relay No. 4 DRL
  • C – Relay No. 3 DRL


That’s all. If you have something to add – write in the comments.

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