Fuse Box Diagrams Lexus RX450H (AL10; 2010-2012)

In this article, you will find information about the fuses of the Lexus RX450H (AL10) (models 2010, 2011, and 2012), 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 RX 450H

The fuses are designed to blow before the entire wiring harness is damaged. If any of the electrical components do not operate, a fuse may have blown. If this happens, check and replace the fuses as necessary. Replace it with one of an appropriate amperage rating. The amperage rating can be found 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.

Location of Fuse Boxes

Engine Compartment:
Push the tab in and lift the lid off.

Removing the engine compartment covers:

Passenger Compartment:
Remove the lid.

Luggage Compartment:

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Fuse Box Diagrams

2010-2012

Engine Compartment Fuse Box #1

List of fuses in the Engine Compartment Fuse Box #1

№	Fuse	A	Circuit
1	PCU	15A	Hybrid system
2	IGCT NO.2	10A	Hybrid system
3	IGCT NO.3	10A	Hybrid system
4	INV W/P	10A	Hybrid system

Engine Compartment Fuse Box #2

List of fuses in the Engine Compartment Fuse Box #2

№	Fuse	A	Circuit
1	SPARE	120A	-
2	RR DEF	50A	Rear window defogger
3	AIR SUS	50A	Electronically modulated air suspension system
4	HTR	50A	Air conditioning system
5	ECB NO.1	50A	Brake system, vehicle stability control, vehicle dynamics integrated management, meters and gauges
6	RDI FAN NO.1	40A	Electric cooling fans
7	RDI FAN NO.2	40A	Electric cooling fans
8	H-LP CLN	30A	Headlight cleaner
9	PBD	30A	Power back door system
10	HV R/B NO.1	30A	PCU, IGCT NO.2, IGCT NO.3, INV W/P
11	PD	50A	Daytime running light system, A/F, H-LP RH HI, H-LP LH LO, H-LP RH LO, H-LP LH HI, HORN, S-HORN, multiplex communication system, multiport fuel injection system/ sequential multiport fuel injection system
12	ECB NO.2	50A	Brake system
13	HV R/B NO.2	80A	ECB MAIN1, ECB MAIN 2, A/C W/P, BATT FAN, OIL PMP
14	DCDC	150A	FUEL OPN, DR LOCK, OBD, RR FOG, S/ROOF, INVERTER, ECU-IG1 NO.1, ECU-IG1 NO.2, PANEL, GAUGE NO.1
15	AMP1	30A	Audio system
16	EFI MAIN	30A	Multiport fuel injection system/ sequential multiport fuel injection system, EFI NO.2
17	AMP2	30A	Audio system
18	IG2 MAIN	30A	Starter system, IGN, GAUGE NO.2, ECU IG2
19	IP JB	25A	Power door lock system
20	STR LOCK	20A	Starter system
21	RAD NO.3	15A	Meters and gauges, instrument panel lights, navigation system, audio system
22	HAZ	15A	Emergency flashers
23	ETCS	10A	Multiport fuel injection system/ sequential multiport fuel injection system
24	RAD NO. 1	10A	Audio system
25	AM2	7.5A	Starter system
26	ECU-B NO.2	7.5A	Air conditioning system, front passenger occupant classification system, starter system, electric power steering system
27	MAYDAY/TEL	7.5A	Mayday system / Safety Connect, Lexus Enform
28	IMMOBI	7.5A	-
29	ECB MAIN NO.3	15A	Brake system
30	IGN	10A	Multiport fuel injection system/ sequential multiport fuel injection system, brake system, SRS airbag system
31	DOME	10A	Vanity mirror lights, luggage compartment lights, interior lights, personal lights
32	ECU-B NO.1	10A	Interior lights, personal lights, tilt and telescopic steering, multiplex communication system, meters and gauges, power windows, driving position memory system, power seats, power back door, head-up display, starter system, air conditioning system, power door lock system
33	EFI NO.1	10A	Multiport fuel injection system/ sequential multiport fuel injection system
34	WIP-S	7.5A	Windshield wipers and washer
35	AFS	7.5A	Adaptive front-lighting system
36	BK/UP LP	7.5A	Back-up lights
37	HEATER NO.2	7.5A	Air conditioning system, AWD system
38	ECU IG1	10A	Adaptive front-lighting system, headlight cleaner, cooling fan, cruise control, electronically modulated air suspension system, vehicle stability control, vehicle dynamics integrated management, brake system
39	EFI NO.2	10A	Multiport fuel injection system/ sequential multiport fuel injection system
40	F/PMP	15A	Multiport fuel injection system/ sequential multiport fuel injection system
41	DEICER	25A	Windshield wipers and washer
42	STOP	7.5A	Vehicle stability control, vehicle dynamics integrated management, high mounted stoplight
43	TOWING BATT	20A	Trailer battery
44	TOWING	30A	Trailer lights
45	FILTER	10A	Condenser
46	IG1 MAIN	30A	ECU IG1, BK/UP LP, HEATER NO.2, AFS
47	H-LP RH HI	15A	Right-hand headlight (high beam)
48	H-LP LH HI	15A	Left-hand headlight (high beam)
49	BIXENON	10A	Discharge headlight
50	H-LP RH LO	15A	Right-hand headlight (low beam)
51	H-LP LH LO	15A	Left-hand headlight (low beam)
52	HORN	10A	Horn
53	A/F	20A	Multiport fuel injection system/ sequential multiport fuel injection system
54	S-HORN	7.5A	Security horn

Engine Compartment Fuse Box #3

List of fuses in the Engine Compartment Fuse Box #3

№	Fuse	A	Circuit
1	ECB MAIN NO.1	10A	Brake system
2	ECB MAIN NO.2	10A	Brake system
3	BATT FAN	15A	Battery cooling fan
4	OIL PMP	10A	Hybrid system
5	A/C W/P	10A	Air conditioning system

Instrument Panel Fuse Box

List of fuses in the instrument panel

№	Fuse	A	Circuit
1	P/POINT	15A	Power outlet
2	ECU-ACC	10A	Navigation system, outside rear view mirror, multiplex communication system, multi-information display, head-up display
3	CIG	15A	Power outlet
4	RADIO NO.2	7.5A	Audio system, power outlet
5	GAUGE NO.1	10A	Emergency flashers, navigation system, head-up display
6	ECU-IG1 NO.3	10A	Outside rear view mirror, windshield wipers and washer, seat heaters, starter system, power outlet, moon roof
7	ECU-IG1 NO.1	10A	Multiplex communication system, electric power steering system, shift lock control system, tilt and telescopic steering, starter system, hybrid transmission system, power back door, hybrid system, tire pressure warning system
8	S/ROOF	30A	Moon roof
9	FUEL OPN	7.5A	Fuel filler door opener
10	PSB	30A	Pre-collision seat belt
11	TI&TE	30A	Tilt and telescopic steering system
12	DR LOCK	10A	Power door lock system
13	FR FOG	15A	-
14	P-SEAT LH	30A	Power seat (left-side)
15	INVERTER	20A	-
16	RR FOG	7.5A	-
17	D/L ALT B	25A	Multiplex communication system
18	HEATER	10A	Air conditioning system
19	ECU-IG1 NO.2	10A	Air conditioning system, multiport fuel injection system/sequential multiport fuel injection system, SRS airbag system, multi-information display, capacitor
20	PANEL	10A	Switch illumination, navigation system, height control system, headlight cleaner, windshield wiper de-icer, seat heater, power back door, audio system, multi-information display, air conditioning system
21	TAIL	10A	Position lights, tail lights, license plate lights, towing converter
22	AIR SUS	20A	Electronically modulated air suspension system
23	P-SEAT RH	30A	Power seat (right-side)
24	OBD	7.5A	On-board diagnosis
25	FR DOOR	25A	Front power window (right-side)
26	RR DOOR	25A	Rear power window (right-side)
27	FL DOOR	25A	Front power window (left-side)
28	RL DOOR	25A	Rear power window (left-side)
29	FR WASH	25A	Windshield wipers and washer
30	RR WIP	15A	Windshield wipers and washer
31	RR WASH	20A	Windshield wipers and washer
32	FR WIP	30A	Windshield wipers and washer
33	ECU IG2	10A	Starter system, intuitive parking assist, AWD system
34	GAUGE NO.2	7.5A	Starter system
35	RH S-HTR	15A	Seat heater (right-side)
36	LH S-HTR	15A	Seat heater (left-side)

Luggage Compartment Fuse Box #1

List of fuses in the Luggage Compartment Fuse Box #1

№	Fuse	A	Circuit
1	DCDC-S	7.5A	Hybrid system
2	CAPACITOR	10A	Hybrid system

Luggage Compartment Fuse Box #2

List of fuses in the Luggage Compartment Fuse Box #2

№	Fuse	A	Circuit
1	MAIN	180A	Main fuse (All electrical components)
2	RR-B	50A	CAPACITOR, DCDC-S
3	EPS	80A	Electric power steering system

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