Toyota Sienna Fuse Box Locations and Diagrams (2003-2010)

The second-generation Toyota Sienna (Model Code: XL20), produced from 2003 to 2010, is a dependable and family-friendly minivan that introduced major improvements in space, safety, and performance over its predecessor. With optional all-wheel drive, a powerful V6 engine, and increased interior comfort, the XL20 Sienna became a top choice for families seeking practicality and reliability.

In this article, you will find fuse box diagrams for the Toyota Sienna, covering model years 2003, 2004, 2005, 2006, 2007, 2008, 2009, and 2010. These diagrams are designed to help you identify and understand the layout and function of each fuse and relay in the vehicle’s electrical system.

What’s Included:

Fuse Box Diagrams – Easy-to-read diagrams showing the layout and designation of fuses and relays.
Fuse Panel Locations – Clear guidance on where to find the interior and engine compartment fuse panels.
Fuse Assignments – Detailed explanations of each fuse and relay’s role to support troubleshooting and maintenance.

Whether you’re fixing an electrical issue or simply replacing a fuse, this guide is a useful resource to help keep your Toyota Sienna (2003–2010) operating safely and efficiently.

What’s Included

Overview

Passenger Compartment

Fuse box location

The fuse box is located under the instrument panel (on the left side), behind the lid.

The location of the fuses in the passenger compartment: Toyota Sienna (XL20; 2004-2010)

Fuse box diagram

Assignment of the fuses in the Passenger Compartment

№	Name	Amp	Protected components
1	MIR HTR	10	Outside rear view mirror defoggers
2	RAD2	7.5	Audio system, navigation system, rear seat entertainment system
3	PWR OUTLET	15	Power outlets
4	CIG	15	Cigarette lighter
5	ECU ACC	7.5	Shift lock control system, air conditioning system, power rear view mirror control
6	GAUGE2	7.5	Meter and gauge
7	IGN	7.5	Multiport fuel injection system/ sequential multiport fuel injection system, SRS airbag system, multiplex communication system
8	INJ	15	2003-2006: Multiport fuel injection system/ sequential multiport fuel injection system
8	IG2	7.5	2007-2010: Multiport fuel injection system/ sequential multiport fuel injection system
9	RR WIP	15	Rear window wiper
10	WIP	30	Windshield wiper and rear window wiper
11	GAUGE1	10	Back-up lights, turn signal lights, emergency flashers
12	S-HTR	15	Seat heaters
13	WSH	20	Windshield washer and rear window washer
14	HTR	10	Air conditioning system
15	–	–	–
16	ECU-IG	10	Intuitive parking assist system, rear view monitor system, multiplex communication system, multiport fuel injection system/sequential multiport fuel injection system, antilock brake system, traction control system, vehicle stability control system, shift lock control system, dynAM1c laser cruise control system, seat heaters, power back door, moon roof, multi-information display, auto antiglare inside rear view mirror, power windows, power outlets (115 V), power third seat, driving position memory system
17	PANEL	10	Air conditioning system, seat heaters, audio system, navigation system, power sliding door, power back door, trip information display, rear window defogger, emergency flashers, instrument panel lights, steering switch lights
18	TAIL	10	Stop/tail lights, license plate lights, parking lights, side maker lights
19	S/ROOF	25	Moon roof
20	–	–	–
21	AC INV	15	Power outlets (115 V)
22	FR DEF	15	Windshield wiper de-icer
23	AM1	7.5	Multiport fuel injection system/ sequential multiport fuel injection system, starter system
24	–	–	–
25	–	–	–
26	STOP	10	Stop/tail lights, high mounted stoplight, shift lock control system, antilock brake system, traction control system, vehicle stability control system, multiport fuel injection system/sequential multiport fuel injection system, multiplex communication system
27	P/W	25	Power windows, power rearview mirror
28	OBD	7.5	On-board diagnosis system
29	FOG	15	Front fog lights
30	–	–	–
31	–	–	–
32	P/VENT	15	Power quarter windows

№	Name	Amp	Circuit
1	P/SEAT	30	Power seats
2	POWER	30	Power windows

Relay
R1			Fog Lights
R2			Tail Lights
R3			Accessory Relay (ACC)
R4			Power Relay (PWR)
R5			Ignition (IG1)

Additional Fuse Box

The fuse box is located in the passenger’s side of the instrument panel.
Open the glove box, slide off the damper, push in each side of the glove box to disconnect the claws.

№	Name	Ampere rating [A]	Circuit
1	ST	7,5	Multiport fuel injection system/sequential multiport fuel injection system
2	A/C	7,5	Manual air conditioning system
3	SFT	5	Shift lock control system

Engine Compartment

Fuse box location

It is located in the engine compartment (left-side).

The location of the fuses in the engine compartment: Toyota Sienna (2004-2010)

Fuse box diagram

Assignment of the fuses and relay in the Engine Compartment

№	Name	Amp	Protected components
1	MAIN	30	Headlights, daytime running light system, “H-LP RL” and “H-LP LL” fuses
2	AM 2	30	“INJ”, “IGN” and “GAUGE2” fuses
3	ETCS	10	Multiport fuel injection system/sequential multiport fuel injection system
4	DRL	20	Daytime running light system, “H-LP RH” and “H-LP LH” fuses
5	DOOR NO.2	25	Power door lock system
6	HORN	10	Horns
7	DOME	10	Personal/interior lights, vanity lights, door courtesy lights, luggage compartment light, engine switch light, multi-information display
8	RAD NO.1	20	2003-2006: Audio system, navigation system
8	RAD NO.1	15	2007-2010: Audio system
9	EFI NO.1	20	Multiport fuel injection system/sequential multiport fuel injection system, “EFI NO.2” fuse
10	ALT-S	7.5	Charging system
11	HAZ	15	Turn signal lights, emergency flashers
12	ECU-B	10	Power sliding door, air conditioning system, power windows, multiplex communication system, meter and gauge, wireless remote control system
13	H-LP RL	15	Right-hand headlight (low beam)
13	H-LP RH	15	Right-hand headlight
14	H-LP LL	15	Left-hand headlight (low beam), front fog lights
14	H-LP LH	15	Left-hand headlight
15	RAD NO.3	30	Audio system
16	EFI NO.2	10	Multiport fuel injection system/sequential multiport fuel injection system
17	A/F	25	A/F sensor
18	SPARE	15	Spare fuse
19	SPARE	20	Spare fuse
20	SPARE	30	Spare fuse
21	SPARE	30	Spare fuse
22	RR2 SEAT	50	Power third seat
23	HTR	50	Air conditioning system, “A/C” fuse
24	FAN	50	Electric cooling fans
25	PBD	30	Power back door
26	R-PSD	30	Right side power sliding door
27	L-PSD	30	Left side power sliding door
28	RR A/C	40	Rear air conditioning system
29	DEF	40	Rear window defogger, “MIR HTR” fuse
30	SPARE	7.5	Spare fuse
31	ALT	140	Charging system, “RR A/C”, “HTR”, “FAN”, “PBD”, “R-PSD”, “L-PSD” and “DEF” fuses
32	ABS1	50	Anti-lock brake system, traction control system, vehicle stability control system
33	ABS2	30	Anti-lock brake system, traction control system, vehicle stability control system
34	ST	30	Starting system
35	L-RR2 SEAT	30	Power third seat
36	R-RR2 SEAT	30	Power third seat
37	H-LP RH	10	Right-hand headlight
37	H-LP RL	10	Right-hand headlight (low beam)
38	H-LP LH	10	Left-hand headlight
38	H-LP LL	10	Left-hand headlight (low beam), front fog lights
39	RSE	7.5	Rear seat entertainment system
40	INJ	10	2007-2010: Multiport fuel injection system/ sequential multiport fuel injection system
41	–	–	Short Pin
42	–	–	–
43	–	–	–
44	–	–	–
45	–	–	–
46	–	–	–
47	–	–	–
48	–	–	–
49	–	–	–
50	–	–	–
51	–	–	–
52	–	–	Short Pin

Relay
R1			Stop lights (BRK)
R2			Air fuel ratio sensor (A/F)
R3			Circuit opening (C/OPN)
R4			Headlight (HEAD)
R5			EFI
R6			Short Pin
R7			Rear windshield defogger (DEFOG)
R8			Horn
R9			Vehicle stability control (VSC MTR)
R10			Vehicle stability control (VSC FAIL)
R11			Daytime running light (DRL NO.4)
R12			Daytime running light (DRL NO.2)
R13			Daytime running light (DRL NO.3)
R14			Electric cooling fan (FAN)
R15			Rear air conditioning system (RR A/C)
R16			Heater (HTR) (manual A/C) Short Pin (automatic A/C)
R17			Starter (ST)
R18			Air conditioner compressor clutch (MG CLT)
R19			–

FAQ

Which fuses control the cigar lighter and power outlets in the Toyota Sienna?

In the Toyota Sienna, multiple fuse circuits handle the standard cigar lighter outlet, auxiliary power sockets, and optional AC inverter. All are located in the Instrument Panel Fuse Box:

Fuse #3 “PWR OUTLET” – Protects the regular 12 V accessory power outlets (power points)
Fuse #4 “CIG” – Dedicated to the cigar lighter / cigarette lighter socket
Fuse #21 “AC INV” – For 115 V AC power outlets (when equipped with an inverter)

Check these fuses if interior power outlets or the lighter stop functioning, and replace any blown fuse with the correct amp rating as specified in the owner’s manual. Let me know if you’d like the exact amperage or fuse location details!