Lexus RX300 2nd generation was produced in 2003, 2004, 2005, 2006, 2007, 2008 and 2009 with designation XU30 with 1MZ-FE 3,0 litre engines – RX300, 3MZ-FE 3,3 litre – RX330 and 2GR-FE 3,5 litre – RX350. During this time, the model has been restyled. In this publication we will present a description of fuses and relays Lexus RX 300 330 350 2nd generation with fuse box diagrams and their locations. We will separately note the fuse responsible for the cigarette lighter.
Fuse and relay assignments may differ from those shown and depend on the year of manufacture, region of delivery and the level of electrical equipment in your vehicle.
Passenger compartment
In the passenger compartment, the fuse box is located on the left side, under the instrument panel. To access it, remove the cover plate.
Fuses
Diagram
Assignment
35 | 20A RR DOOR RH – Rear right window lift |
36 | 20A RR DOOR LH – Rear left window lift |
37 | 7.5A FUEL OPN – Fuel tank filler flap |
38 | 15A FR FOG – Front fog lights |
39 | 7.5A OBD – Diagnostic connector |
40 | 25A FR DEF – Wiper, fuse: “MIR HTR” |
41 | 10A STOP – Parking lights, auxiliary brake light, ABS, vehicle stabilisation system, traction control, brake assist, engine electronics, air suspension, transmission selector lock, lamp malfunction unit |
42 | 30A TI&TE – Steering column adjustments |
43 | 7.5A Not used |
44 | 7.5A AM1 – Starter |
45 | 7.5A RR FOG – Rear Fog Light |
46 | 7.5A AIR SUS – Air suspension |
47 | 25A DOOR NO. 2 – Multiplex unit |
48 | 30A S/ROOF – Sunroof |
49 | 10A TAIL – Front fog lights, instrument cluster illumination, instrument panel illumination, parking lights, number plate illumination, trailer connector |
50 | 7.5A PANEL – instrument panel illumination, audio system, armrest compartment lighting, power socket, automatic transmission control unit, headlight washer, air suspension control unit, seat heating, boot door, steering wheel buttons, garage door remote control |
51 | 7.5A ECU-IG NO. 1 – Lexus Link System, mirror control unit, sunroof, multiplex unit, navigation display, transmission selector lock, driver memory, windscreen wiper, automatic transmission control unit, seat heating, steering column adjustment, tailgate, air suspension control unit, vehicle stabilisation system, traction control |
52 | 10A ECU-IG NO. 2 – Automatic headlight corrector, vehicle stabilisation system, headlight washer, adaptive lighting system, dynamic cruise control |
53 | 7.5A HEATER – Cooling fan, air conditioning, rear window heater, ignition switch, windscreen wiper |
54 | 20A WASHER – Glass washer |
55 | 20A SEAT HTR – Seat heater |
56 | 7.5A GAUGE NO. 1 – reversing lamps, instrument cluster illumination, instrument cluster illumination, instrument panel illumination, emergency alarm, unbelted belt indicator, socket, engine electronics, lamp malfunction unit |
57 | 30A FR WIP – Windscreen wiper |
58 | 15A RR WIP – Rear windscreen wiper |
59 | 20A INJ – Engine electronics |
60 | 10A IGN – Stop lamp, SRS (airbags), engine electronics, front passenger mass detection system control unit |
61 | 7.5A GAUGE NO. 2 – Instrument cluster |
62 | 7.5A ECU-ACC – Navigation, mirror control unit, transmission selector lock, multiplex unit |
63 | 15A CIG – Cigarette lighter, power socket |
64 | 15A PWR OUTLET NO. 1 – Socket |
65 | 7.5A RADIO NO. 2 – Instrument panel illumination, instrument cluster illumination, navigation, audio system, Lexus Link System |
66 | 10A MIR HTR – Heated mirrors |
67 | 30A P/SEAT – Power seats |
68 | 30A PWR – Power windows, multiplex unit, power mirrors |
Fuses 63 and 64 are responsible for the cigarette lighter and the rear socket. Another fuse is located in a block under the bonnet.
Fuses 68 for 30A POWER – Power windows and 67 for 30A P/SEAT – Power seats are located separately in the upper part of the block.
Relay
Several relay elements are attached to the back of the unit.
Designation
- Fog light
- Parking light
- Auxiliary relay
- Power windows
- Ignition (IG1)
The turn signal relay (81980) is mounted separately in the upper part.
Engine compartment
The main fuse and relay box is located under the hood on the left-hand side.
Check the assignment of the elements with your circuit diagrams on the back of the protective cover.
Example circuit diagram
Fuses
Diagram
Allocation
2 | 100A INP-J/B – Without air suspension : Fuses: “HEATER”, “H-LP CLN”, “TAIL”, “PANEL”, “FR FOG”, “CIG”, “RADIO NO. 2”, “ECU-ACC”, “PWR OUTLET NO. 1”, “GAUGE NO. 1”, “ECU-IG NO. 1″,” FR WIP”, “RR WIP”, “WASHER”, “SEAT HTR”, “ECU-IG NO. 2”, “P/SEAT”, “PWR”, “TI&TE”, “RR DOOR LH”, “RR DOOR RH”, “MPX-B”, “AM1”, “DOOR NO. 2”, “STOP”, “OBD”, “FUEL OPN”, “AIRSUS” (7.5 A), “S/ROOF”, “FR DEF” and “RR FOG”. |
60A AIRSUS – With air suspension: Air suspension. | |
3 | 140A ALT – Fuses: “INP-J/B”, “AIRSUS” (60 A), “ABS NO. 1”, “ABS NO. 2”, “RDI FAN”, “RR DEF”, “HEATER”, “PBD”, “H-LP CLN/MSB”, “H-LP CLN”, “PWR OUTLET NO. 2”, “TOWING”, “TAIL”, “PANEL”, “FR FOG”, “CIG”, “RADIO NO. 2”, “ECU-ACC”, “PWR OUTLET NO. 1”, “GAUGE NO. 1”, “ECU-IG NO. 1”, “FR WIP”, “RR WIP”, “WASHER”, “HEATER”, “SEAT HTR”, “ECU-IG NO. 2”, “P/SEAT”, “PWR”, “TI&TE”, “RR DOOR LH”, “RR DOOR RH”, “MPX-B”, “AM1”, “DOOR NO. 2”, “STOP”, “OBD”, “FUEL OPN”, “AIRSUS” (7.5 A), “S/ROOF”, “FR DEF” and “RR FOG”. |
4 | 30A PBD – Trunk door lock |
5 | 30A H-LP CLN/MSB – Headlamp washer |
6 | 30A H-LP CLN – Headlamp washer |
7 | 30A ABS NO. 1 – ABS, vehicle stabilisation system, traction control, brake assist system |
8 | 40A RR DEF – Rear window heater |
9 | 50A HEATER – Air conditioning, rear window heater |
10 | 7.5A DRL – Daytime running lights |
11 | 15A H-LP L LWR – Near Left Light |
12 | 15A H-LP L UPR – Far left light |
13 | 15A H-LP R UPR – Far right light |
14 | 20A PWR OUTLET NO. 2 – Socket |
15 | 30A TOWING – Trailer lighting |
16 | 50A ABS NO. 2 – ABS, vehicle stabilisation system, traction control, brake assist system |
17 | 50A RDI FAN – Cooling fan |
18 | 15A HAZ – Direction indicators |
19 | 7.5A CRT – Audio system |
20 | 7.5A ALT-S – Charging system |
21 | 10A ETCS – Engine Electronics |
22 | 10A HORN – Horn |
23 | 40A MAIN – Daytime running lights, left headlamp, right headlamp, fuses: “H-LP R LWR”, “H-LP R UPR”, “H-LP L UPR”, “H-LP L LWR” and “DRL”. |
24 | 30A AM2 – Starter, fuses: “GAUGE NO. 2”, “IGN” and “INJ”. |
25 | 15A RADIO NO. 1 – Audio system, navigation |
26 | 7.5A ECU-B – Power windows, instrument cluster, air conditioning, navigation display, sunroof, power seats, steering column adjustment, windscreen wiper, monochrome rear view mirror, multiplex unit, instrument panel illumination, garage door remote control, door lamps, boot door, driver’s settings memory |
27 | 7.5A DOME – Instrument cluster, interior lighting, visor mirror illumination, ignition switch illumination, luggage compartment illumination, licence plate illumination, interior door handle illumination, footwell illumination, sill illumination, door lamps |
28 | 7.5A TEL – Lexus Link System |
29 | 30A AMP – Audio System |
30 | 25A DOOR NO. 1 – Multiplex unit |
31 | 25A A/F – Engine Electronics |
32 | 25A EFI NO. 1 – Engine electronics, fuse: “EFI NO. 2” |
33 | 15A H-LP R LWR – Near right-hand light |
34 | 10A EFI NO. 2 – Engine electronics |
Relay
Diagram
Decoding
- A – STARTER relay of the starting system
- B – HORN horn relay
- C – EFI MAIN injection system main relay / fuel module / petrol pump
- D – AIR SUS air suspension relay
- E
- F
- G – A/F relay of electronic engine control unit
Some additional protection elements can be installed separately, outside the blocks, e.g.: central locking system relay, heater relay, etc.
Anything to add, write in the comments.