This is an exhaustive list of the locations of 2004-2010 Toyota Sienna fuse boxes, descriptions of the circuits each fuse protects, definitions of each fuse, and links to where to purchase them. When troubleshooting your Sienna often it is nice to be able to easily located the fuse for that particular electrical component. I’ve also tried to explain what fuses are and why they are different sizes for people new to electronics. If you need a replacement fuse, click on the fuse names to be taken to purchase the fuse. Use your browser’s search function (keyboard shortcut Control-F in windows, Command-F on a Mac) to search for keywords within this article.

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Toyota Sienna Fuse Locations

Applicable Vehicles

Parts

Tools Needed

Note: In the engine compartment fuse box there is a small white tool designed to remove mini fuses.

Why do vehicles have fuses?

The Purpose of Fuses

Fuses are designed to be the weakest electrical link in a given electrical circuit. In the mechanical world, a comparable technology would be the sheer pin or sheer bolt–the bolt is a designed weak point so that if you exceed the torque on a drive shaft, the sheer bolt breaks instead of really destroying the machine. When I was replacing all the incandescent light bulbs in the interior of my Sienna I accidentally (how I’m still not sure) shorted out the terminals of one light bulb and blew the fuse. You can read about how I got myself out of that one here: How to Replace 10-Amp Dome Light Fuse on 2004-2010 Toyota Sienna

Why are Fuses Different Sizes?

A given circuit has electronics in it that are known to use a maximum number of amps. Engineers who design electronics determine the maximum amperage a circuit will ever require at a time and then put a fuse slightly higher than the sum of all the current of those components. The fuse is placed in series with the circuit. That way, if anything abnormal happens, if there is a short-circuit, or if a component fails and causes that circuit to draw more amps than safe, the fuse blows and protects the wiring and other components in the circuit. If a fuse was not used in series with the circuit, the next weakest component would fail instead, and who knows where that might be–it could be another component in the circuit or it could be the wiring. Fires would be caused by overheated wiring. If you don’t have fuses, when something went bad, you would be replacing wiring harnesses or replacing multiple electrical components. A fuse is easy to replace and since you know what is on the fuse’s circuit, you can immediately begin to troubleshoot the components on that circuit (or remove them to eliminate them as a cause) and determine what is causing the current to exceed the normal levels and the fuse to blow.

Why You Should Not Install a Higher Amp Fuse

Someone may be tempted, if they keep blowing a certain amp fuse, to install a higher amp fuse instead, or even worst, to short-circuit the fuse socket and bypass the fuse. Like I mentioned in the previous paragraph, the fact that the fuse is blowing is a nice and controlled warning that something is wrong. If you install a higher amp fuse or short out the fuse socket you are asking to severely damage who knows what on that circuit and/or blow other higher amp fuses in the fusible link assembly. This warning goes for anything that has a fuse.

WARNING: DO NOT install a higher amp fuse, or worst, short out the fuse!!!

What are Amps?

Amps is the abbreviation for Amperes, often simply written by the letter A, which is the basic unit of electric current. It’s like saying miles or kilometers when talking about distance. Current is the flow rate of electrons through a given circuit–like how fast water is flowing through a pipe. When you see the amp rating on a fuse, it is how much current can pass through that fuse before the material of the fuse overheats and then melts, opening the circuit of the fuse.

Can I be Shocked When Changing a Fuse?

Someone may see that they are choosing a 30-amp fuse and become scared that they could be shocked. Some household electrical wiring circuits are 30 amps (wall outlets for example), but those are on 110V AC circuits, not 12V DC like in an automobile. You do not need to worry about being shocked when working on your vehicles 12-volt wiring. Anywhere else in your car you are behind a fuse and the worst thing that really could happen is that you might get a short burst of sparks if you shorted a positive wire to ground but the fuse would blow immediately, stopping anything else from happen.

You can touch the positive and negative of a 12-volt car battery, with dry hands, and nothing will happen. That is because the resistance of your body is high. With dry hands, the resistance of your body, from one hand to the other, is as high as 100,000 ohms. Ohm’s law states, V=IR where V stands for volts, I stands for Current, and R stands for resistance. With a small amount of algebra you can reshape that formula to solve for I, I=V/R. If V=12 and R=100,000, the current that will flow through your body from one hand to the other is 0.00012 Amps, or 0.12 milli-amps. This is a very small amount. It takes over 60 milli-amps to kill you (that was the lowest amount I found anyone claim was dangerous to cause death in this article), and that is 500 times more than what will flow through your body if you touch a car battery with one dry hand on the negative terminal and the other dry hand on the positive terminal. The deal is, is that the voltage is so low, it is not dangerous.

A Note about Accidental Car Battery Shorting

If you shorted out the positive terminal of the battery to the frame , will get a burst of sparks, a lot of heat will be generated, and you will experience molten metal, as if you were running a welder. That is because there are no fuses between you and the battery and all the amps available at the battery are trying to flow through the metal object you just shorted to ground. I’ve done this at least once when tightening the bolt on the battery with a socket and ratchet–somehow I accidentally touched the handle of the socket on the frame, which is the ground of the circuit. That will scare you!?!? Given the high amount of amps available to an automotive battery you need to be careful in that regard. The same thing would happen if you short the two terminals of the battery.

Toyota Sienna Fuse Types

There are four different types of fuses used on the Toyota Sienna, as described in the owner’s manual:

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The four different fuse types: A, B, C, and D

Type A is a blade-type mini fuse. This is the only type I’ve ever dealt with and the most common type of fuse. They have a curved wire inside which burns through when the fuse blows. You must remove the fuse in order to check to see if the fuse is blown. Here is a fuse I accidentally blew when I was installing LED interior lights on my Sienna:

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Blown Mini Fuse

Type B is a medium current fuse, abbreviated by M-FUSE in the shop manual. I have seen these referred to as fusible links as well and they are higher amp fuses.

Type C and D are all part of the fusible link assembly. I think the only reason you would blow one of these is if you have placed a higher amp fuse than prescribed in multiple locations, allowing an overload of one circuit branch, or you have some majorly malfunctioning hardware with a short-circuit. Here’s a picture of these types of fuses:

High amp fuse bar traces close up

The shop manual gives these illustrations on fuses:

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Shop Manual Medium and High Amp Fuse Descriptions

Spare Fuses

In the two larger fuse boxes you will see fuse sockets that are labeled “Spare” and the amperage of the fuse, for example, fuses 16 through 20 are all spares of different sizes. If you have a blown fuse, you can replace it with a spare of the same amperage:

16. SPARE 15 A (mini size)17. SPARE 20 A (mini size)18. SPARE 30 A (mini size)19. SPARE 30 A (mini size)20. SPARE 7.5 A (mini size)

If you use a spare fuse you should keep the blown one and purchase a replacement to install in the spare socket for next time.

Engine Compartment Fuse Box

Location of Engine Compartment Fuse Box

The engine compartment fuse box is located on the driver’s side, near the battery:

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Location of Engine Compartment Fuse Box

Opening the Engine Compartment Fuse Box

On the front side of the fuse box there is a latch that must be retracted to open the fuse box cover:

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Press this tab to release the fuse box latch

On the other side of the fuse box cover there are hooks

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These hooks latch the back side of the fuse box cover

Press the tab in on the front and rotate the front edge up and gradually push the cover toward the rear of the vehicle and the cover will release:

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Engine compartment fuse box cover removal

Here the engine compartment fuse box cover is removed:

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Engine fuse box cover Removed

Picture of Engine Compartment Fuse Box

There is a diagram on underneath side of the engine compartment fuse cover for reference and here’s a cleaner version from the owner’s manual. One thing to note is that some of the components are not numbered.

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Diagram on back of Engine Compartment Fuse Box Cover

Here’s a picture of the fuses, along with the fuse numbers and relay names, which I added:

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Engine Compartment Fuse Box Picture Diagram

Engine Compartment Relays

In the picture above of the engine compartment fuse box you will notice that some of the components are not fuses, they are relays. The large purple and blue boxes are relays. A relay is a electrically-controlled switch. Here is a diagram detailing the top half of the above fuse box, including the relay names:

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This diagram names the relays

Here is the lower section:

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Here are the relays in the bottom half of the engine compartment fuse box

Engine Compartment Fuse Box High Amp Fuse Section

In the middle of the engine compartment fuse box there are two rows of fuses that are covered up by a translucent plastic cover. This entire component is called the junction block or fusible link assembly (part number 8262008020 or826200-8020).

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Engine Compartment High-Amp Fuse Section

Essentially this is a bar which has fuse wires jutting out from the bottom edge of it. It is a one-piece deal and if you blew one of them you would need to replace the entire fuse bank. You can remove the cover by VERY CAREFULLY prying up the clips of the cover(the clips are fragile I’m sure), one at a time with a sharp-pointed knife, as shown below (but I’ve never had a reason to open it other than for the love of explaining for this article):

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Releasing a high-amp fuse cover clip

Here is the cover removed:

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High-Amp Fuse Cover Removed
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High Amp Fuses with Numbers
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View from cabin side of high amp fuses in the fusible link

Here’s a close up of what they look like:

High amp fuse bar traces close up

Engine Compartment Fuse Diagram, Numbers, and Descriptions

Below is the diagram of the engine compartment fuse box, followed by a list of the official abbreviations and descriptions:

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Engine Compartment Fuse Diagram

Fuses 1-23 are mini-type fuses (which are all included in this set):

1. ETCS 10 A – Multiport fuel injection system/sequential multiport fuel injection system2. EFI NO.1 20 A – Multiport fuel injection system/sequential multiport fuel injection system, “EFI NO.2” fuse3. H-LP RL 15 A – Right-hand headlight (low beam)4. DRL 20 A – Daytime running light system, “H-LP RH” and “H-LP LH” fuses5. ALT-S 7.5 A – Charging system6. H-LP LL 15 A – Left-hand headlight (low beam), front fog lights7. DOOR NO.2 25 A – Power door lock system8. HAZ 15 A – Turn signal lights, emergency flashers9. RAD NO.3 30 A – Audio System10. A/F 25 A – A/F sensor11. HORN 10 A – Horns12. EFI NO.2 10 A – Multiport fuel injection system/sequential multiport fuel injection system13. DOME 10 A – Interior lights, personal lights, vanity lights, door courtesy lights, luggage compartment light, ignition switch light, multi-information display14. ECU-B 10 A – Power sliding door, air conditioning system, power windows, multiplex communication system, meter and gauge, wireless remote control system15. RAD NO.1 20 A – Audio system, navigation system16. SPARE 15 A – Spare 15-Amp Fuse17. SPARE 20 A – Spare 20-Amp Fuse18. SPARE 30 A – Spare 30-Amp Fuse19. SPARE 30 A – Spare 30-Amp Fuse20 SPARE 7.5 A – Spare 7.5-Amp Fuse21. H-LP RH 10 A – Right-hand headlight22. H-LP LH 10 A – Left-hand headlight23. RSE 7.5 A – Rear seat audio system, rear seat entertainment system

Fuses 52-53 are Type B fuses (larger square-shaped):

52. MAIN 30 A – Headlights, daytime running light system, “H-LP RL” and “H-LP LL” fuses, part Number 90982-08280, Amazon.com or Toyota Parts. (this is a Type B fuse)53. AM2 30 A – “INJ”, “IGN” and “GAUGE2” fuses, part Number 90982-08280, Amazon.com or Toyota Parts. (this is a Type B fuse)

Fuses 56-67 Are All Part of the Fusible Link Assembly

56. SPARE 50A – Spare 50-Amp fuse (part of the fusible link assembly)57. HTR 50 A – Air conditioning system, “A/C” fuse (part of the fusible link assembly)58. FAN 50 A – Electric cooling fans (part of the fusible link assembly)59. PBD 30 A – Power back door (part of the fusible link assembly)60. R-PSD 30 A – Right side power sliding door (part of the fusible link assembly)61. L-PSD 30 A – Left side power sliding door (part of the fusible link assembly)62. RR A/C 40 A – Rear air conditioning system (part of the fusible link assembly)63. DEF 40 A – Rear window defogger, “MIR HTR” fuse (part of the fusible link assembly)64. ABS1 50 A – Anti-lock brake system, traction control system, vehicle stability control system (part of the fusible link assembly)65. ABS2 30 A – Anti-lock brake system, traction control system, vehicle stability control system (part of the fusible link assembly)66. ST 30 A – Starting system (part of the fusible link assembly)67. ALT 150 A – Charging system, “RR A/C”, “HTR”, “FAN”, “PBD”, “R-PSD”, L-PSD” and “DEF” fuses (part of the fusible link assembly)

Driver’s Side Instrument Panel Fuse Box

This is also referred to as the “Instrument Panel Junction Block Assy” in the shop manual. There is a small black cover that snaps on top of it. All the fuses in this panel are the mini (blade) type.

Location of Driver’s Side Instrument Panel Fuse Box

It is located above and to the right of the emergency brake pedal:

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Instrument Panel (Driver’s Side) Fuse Box Location

It faces down and has a black cover on it.

Opening Driver’s Side Instrument Panel Fuse Box

To remove the cover grab the tab on the far side and pull it straight down (the view looking almost straight up at the bottom):

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Pull straight down on this tab to pop the cover free

Picture of Driver’s Side Instrument Panel Fuse Box

The diagram on the outside of the cover is laid out in the other direction, in portrait layout:

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Diagram on cover of driver’s instrument panel fuse box

Here are the driver’s side instrument panel fuses:

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Driver’s Instrument Panel Fuse Box Picture

Driver’s Side Instrument Pane Fuse Box Diagram, Numbers, and Descriptions

Here is the diagram of the driver’s side instrument panel fuse box, followed by a detailed list of the fuse abbreviations and descriptions:

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Drivers Instrument Panel Fuse Box Diagram

Fuses 24-49 are all mini-type fuses (which are all included in this set) and 54 and 55 are 30-Amp (Type B):

24. MIR HTR 10 A – Outside rear view mirror heaters25. RAD2 7.5 A – Audio system, navigation system, rear seat audio system, rear seat entertainment system26. PWR OUTLET 15 A – Power outlets27. CIG 15 A – Cigarette lighter28. ECU ACC 7.5 A – Shift lock control system, air conditioning system, power rear view mirror control29. GAUGE2 7.5 A – Meter and gauge30. IGN 7.5 A – Multiport fuel injection system/sequential multiport fuel injection system, SRS airbag system, multiplex communication system31. INJ 15 A – Multiport fuel injection system/sequential multiport fuel injection system32. RR WIP 15 A – Rear window wiper33. WIP 30 A – Windshield wiper and rear window wiper34. GAUGE1 10 A – Back-up lights, turn signal lights, emergency flashers35. S-HTR 15 A – Seat heaters36. WSH 20 A – Windshield washer and rear window washer37. HTR 10 A – Air conditioning system38. ECU-IG 10 A – Toyota park assist system, rear view monitor system, multiplex communication system, multiport fuel injection system/sequential multiport fuel injection system, anti-lock brake system, traction control system, vehicle stability control system, shift lock control system, dynamic laser cruise control system, seat heaters, power back door, electronic moon roof, multi-information display, auto anti-glare inside rear view mirror, power windows, power outlets (115V)39. PANEL 10 A – Air conditioning system, seat heaters, audio system, navigation system, power sliding door, power back door, multi-informational display, rear window defogger, emergency flashers, instrument panel lights, steering switch lights40. TAIL 10 A – Stop/tail lights, license plate lights, parking lights, side marker lights41. S/ROOF 25 A – Electronic moon roof42. AC INV 15 A – Power outlets (115V)43. FR DEF 15 A – Windshield wiper de-icer44. AM1 7.5 A – Multiport fuel injection system/sequential multiport fuel injection system45. STOP 10 A – Stop/tail lights, high mounted stoplight, shift lock control system, anti-lock brake system, traction control system, vehicle stability control system, multiport fuel injection system/sequential multiport fuel injection system, multiplex communication system46. P/W 25 A – Power windows47. OBD 7.5 A – On-board diagnosis system48. FOG 15 A – Front fog lights49. P/VENT 15 A – Power quarter windows54. P/SEAT 30 A – Power seats, Amazon.com or Toyota Parts. (this is a Type B fuse)55. PWR 30 A – Power windows, Amazon.com or Toyota Parts. (this is a Type B fuse)

Passenger-Side Instrument Panel Fuse Box

I didn’t even know this one existed until I consulted the shop manual. It’s not technically in a box and it is a bit hidden.

Location of Instrument Panel Fuse Box (driver’s side)

This fuse box is located behind the glove compartment. To get behind the glove compartment, first open the glove compartment. Next, release the catches on each side of the glove compartment box. To release them, press in on the middle of the side of the glove compartment, bowing the side in, to pull the catch away from the opening. Once you have it outside the opening, hold it there with one hand and then release the one on the other side.

See more: How To Catch Entei And Raikou In Crystal ? Pokemon Second Generation

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Push in the sides to release the catches

Once you have the glove compartment released, you can find the fuse location as indicated below:

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Passenger’s Instrument Fuse Panel Location

Diagram of Instrument Panel Fuse Box (driver’s side)

There’s not much to this fuse panel as it only has two fuses, and if you do not have a manual air conditioner, the bottom one, 51, will be empty:

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Passenger’s Side Instrument panel Fuse Box Diagram
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Here’s a close up of the fuses

Passenger Side Instrument Panel Fuse Box Numbers and Descriptions

50. ST 7.5 A – Multiport fuel injection system/sequential multiport fuel injection system51. A/C 7.5 A – Manual air conditioning system

All Toyota Sienna Fuse Numbers, Names, and Abbreviations

ETCS 10 A – Multiport fuel injection system/sequential multiport fuel injection systemEFI NO.1 20 A – Multiport fuel injection system/sequential multiport fuel injection system, “EFI NO.2” fuseH-LP RL 15 A – Right-hand headlight (low beam)DRL 20 A – Daytime running light system, “H-LP RH” and “H-LP LH” fusesALT-S 7.5 A – Charging systemH-LP LL 15 A – Left-hand headlight (low beam), front fog lightsDOOR NO.2 25 A – Power door lock systemHAZ 15 A – Turn signal lights, emergency flashersRAD NO.3 30 A – Audio SystemA/F 25 A – A/F sensorHORN 10 A – HornsEFI NO.2 10 A – Multiport fuel injection system/sequential multiport fuel injection systemDOME 10 A – Interior lights, personal lights, vanity lights, door courtesy lights, luggage compartment light, ignition switch light, multi-information displayECU-B 10 A – Power sliding door, air conditioning system, power windows, multiplex communication system, meter and gauge, wireless remote control systemRAD NO.1 20 A – Audio system, navigation systemSPARE 15 A – Spare 15-Amp FuseSPARE 20 A – Spare 20-Amp FuseSPARE 30 A – Spare 30-Amp FuseSPARE 30 A – Spare 30-Amp FuseSPARE 7.5 A – Spare 7.5-Amp FuseH-LP RH 10 A – Right-hand headlightH-LP LH 10 A – Left-hand headlightRSE 7.5 A – Rear seat audio system, rear seat entertainment systemMIR HTR 10 A – Outside rear view mirror heatersRAD2 7.5 A – Audio system, navigation system, rear seat audio system, rear seat entertainment systemPWR OUTLET 15 A – Power outletsCIG 15 A – Cigarette lighterECU ACC 7.5 A – Shift lock control system, air conditioning system, power rear view mirror controlGAUGE2 7.5 A – Meter and gaugeIGN 7.5 A – Multiport fuel injection system/sequential multiport fuel injection system, SRS airbag system, multiplex communication systemINJ 15 A – Multiport fuel injection system/sequential multiport fuel injection systemRR WIP 15 A – Rear window wiperWIP 30 A – Windshield wiper and rear window wiperGAUGE1 10 A – Back-up lights, turn signal lights, emergency flashersS-HTR 15 A – Seat heatersWSH 20 A – Windshield washer and rear window washerHTR 10 A – Air conditioning systemECU-IG 10 A – Toyota park assist system, rear view monitor system, multiplex communication system, multiport fuel injection system/sequential multiport fuel injection system, anti-lock brake system, traction control system, vehicle stability control system, shift lock control system, dynamic laser cruise control system, seat heaters, power back door, electronic moon roof, multi-information display, auto anti-glare inside rear view mirror, power windows, power outlets (115V)PANEL 10 A – Air conditioning system, seat heaters, audio system, navigation system, power sliding door, power back door, multi-informational display, rear window defogger, emergency flashers, instrument panel lights, steering switch lightsTAIL 10 A – Stop/tail lights, license plate lights, parking lights, side marker lightsS/ROOF 25 A – Electronic moon roofAC INV 15 A – Power outlets (115V)FR DEF 15 A – Windshield wiper de-icerAM1 7.5 A – Multiport fuel injection system/sequential multiport fuel injection systemSTOP 10 A – Stop/tail lights, high mounted stoplight, shift lock control system, anti-lock brake system, traction control system, vehicle stability control system, multiport fuel injection system/sequential multiport fuel injection system, multiplex communication systemP/W 25 A – Power windowsOBD 7.5 A – On-board diagnosis systemFOG 15 A – Front fog lightsP/VENT 15 A – Power quarter windowsST 7.5 A – Multiport fuel injection system/sequential multiport fuel injection systemA/C 7.5 A – Manual air conditioning systemMAIN 30 A – Headlights, daytime running light system, “H-LP RL” and “H-LP LL” fusesAM2 30 A – “INJ”, “IGN” and “GAUGE2” fusesP/SEAT 30 A – Power seatsPWR 30 A – Power windows

Will You Share YOUR Repair?

If this article was helpful for you please share about it in the comments. If you have any tips to add please share them as well, I’d love to hear from you.