Toyota Prius Fuse Box Locations and Diagrams (2003-2009)

The second-generation Toyota Prius (XW20), produced from 2003 to 2009, marked a major evolution in hybrid vehicle design with its distinctive liftback body, enhanced fuel efficiency, and proven reliability. It became a symbol of eco-conscious driving and laid the groundwork for future hybrid technology across the automotive industry.

In this article, you will find fuse box diagrams for the Toyota Prius, covering model years 2003, 2004, 2005, 2006, 2007, 2008, and 2009. These diagrams help vehicle owners and technicians locate and understand the function of each fuse and relay within the car’s electrical system.

What’s Included:

Fuse Box Diagrams – Clear visual layouts showing fuse and relay positions for each fuse panel.
Fuse Panel Locations – Detailed instructions on where to find each fuse box inside the Prius.
Fuse Assignments – Comprehensive descriptions of each fuse and relay function for quick diagnostics and safe replacements.

Whether you’re addressing a power window issue, troubleshooting lights, or replacing a blown fuse, this guide is a vital tool for maintaining the electrical integrity of your Toyota Prius (2003–2009).

What’s Included

Fuse Box Locations Overview

Passenger Compartment

Fuse box location

The fuse box is located under the instrument panel on the driver’s side, under the cover.

The location of the fuses in the passenger compartment: Toyota Prius (XW20; 2004-2009)

Fuse box diagram

Assignment of the fuses in the Passenger Compartment

№	Name	Amp	Circuit
1	–	–	–
2	M/HTR	15	Outside rear view mirror heater
3	WIP	30	Windshield wiper
4	RR WIP	15	Rear wiper
5	WSH	20	Washer
6	ECU-IG	7.5	Smart key system, power windows, touch screen, electric power steering, theft deterrent system
7	GAUGE	10	Gauge and meter, backup lights, emergency flasher, power windows
8	OBD	7.5	On-board diagnosis system
9	STOP	7.5	Stop lights
10	–	–	–
11	DOOR	25	Power door lock system
12	ACC-B	25	“POWER OUTLET”, “ACC” fuses
13	ECU-B	15	Multi-information display, power windows, air conditioning system
14	–	–	–
15	AM1	7.5	Hybrid system
16	TAIL	10	Tail lights, license plates light, parking lights
17	PANEL	7.5	Multi-information display, clock, audio system, instrument panel lights
18	A/C (HTR)	10	Air conditioning system
19	FR DOOR	20	Power windows
20	–	–	–
21	–	–	–
22	–	–	–
23	PWR OUTLET	15	Power outlet
24	ACC	7.5	Audio system, multi-information display, clock
25	–	–	–
26	–	–	–
27	–	–	–
28	–	–	–
29	PWR OUTLET FR	15	Power outlet
30	IGN	7.5	Hybrid system, hybrid vehicle immobilizer system, SRS airbags
31	–	–	–

№	Name	Amp	Circuit
1	PWR	30	Power windows
2	DEF	40	Rear window defogger
3	–	–	–

Relay
R1			Ignition (IG1)
R2			Heater (HTR)
R3			Flasher

Fusible Link Block

№	Name	Amp	Circuit
1	DC/DS-S	5	Inverter and converter
2	MAIN	120	Hybrid system

Engine Compartment

Fuse box location

Fuse box diagram

Assignment of the fuses and relay in the Engine Compartment

№	Name	Amp	Circuit
1	SPARE	30	Spare
2	SPARE	15	Spare
3	DRL	7.5	Daytime running light system
4	H-LP LO RH	10	with halogen headlight: Right-hand headlight (low beam)
4	H-LP LO RH	15	with discharged headlight: Right-hand headlight (low beam)
5	H-LP LO LH	10	with halogen headlight: Left-hand headlight (low beam)
5	H-LP LO LH	15	with discharged headlight: Left-hand headlight (low beam)
6	H-LP HI RH	10	Right-hand headlight (high beam)
7	H-LP HI LH	10	Left-hand headlight (high beam)
8	EFI	15	Multiport fuel injection system/sequential multiport fuel injection system
9	AM2	15	“IGN” fuse, ignition system
10	HORN	10	Horn
11	HEV	20	Hybrid system
12	P CON MAIN	7.5	Parking control system, hybrid vehicle immobilizer system
13	P CON MTR	30	2003-2004: Parking control system
13	ABS-1	25	2003-2009: Anti-lock brake system
14	ETCS	10	Electronic throttle control system
15	BATT FAN	10	Battery cooling fan
16	HAZ	10	Turn signal lights, emergency flasher
17	DOME	15	Audio system, interior lights, smart entry and start system, gauge and meter, turn signal lights, luggage room light, clock
18	ABS MAIN3	15	Anti-lock brake system
19	ABS MAIN2	10	Anti-lock brake system
20	ABS MAIN1	10	Anti-lock brake system
21	FR FOG	15	Fog lights
22	CHS W/P	10	CHS W/P
23	AMP	30	Audio system
24	PTC HTR2	30	PTC heater
25	PTC HTR1	30	PTC heater
26	CDS FAN	30	Electric cooling fan
27	–	–	–
28	–	–	–
29	P/I	60	“AM2”, “HEV”, “EFI”, “HORN” fuses
30	HEAD MAIN	40	Headlight relay
31	–	–	–
32	ABS-1	30	ABS MTR relay
33	ABS-2	30	Anti-lock brake system
34	–	–	–
35	DC/DC	100	PWR relay, T-LP relay, IG1 relay, “ACC-B”, “ESP”, “HTR”, “RDI”, “PS HTR”, “PWR OUTLET FR”, “ECU-B”, “OBD”, “STOP”, “DOOR”, “FR DOOR”, “DEF”, “AM1” fuses
36	–	–	–
37	–	–	–
38	PS HTR	50	Air conditioner
39	RDI	30	Engine control, radiator fan and condenser fan, TOYOTA hybrid system
40	HTR	40	Air conditioner, TOYOTA hybrid system
41	ESP	50	ESP
42	–	–	–

Relay
R1			Anti-lock brake system (ABS No.2)
R2			Anti-lock brake system (ABS MTR 2)
R3			Headlight (H-LP)
R4			Dimmer
R5			Parking control system (P CON MTR)
R6			Electric cooling fan (FAN No.3)
R7			Electric cooling fan (FAN No.2)
R8			Anti-lock brake system (ABS MTR)
R9			Anti-lock brake system (ABS No.1)

Relay Box

№	Relay
R1	PS HTR
R2	Fog light
R3	PTC heater (PTC HTR1)
R4	PTC heater (PTC HTR2)
R5	Daytime running light system (DRL No.4)
R6	CHS W/P
R7	–

FAQ

Which fuses protect the cigar lighter (power outlet) in the Toyota Prius (2003–2009)?

In the second-generation Toyota Prius (2003–2009), the relevant fuses in the Instrument Panel Fuse Box are:

Fuse #12 “ACC‑B” – protects the accessory circuit, including power outlets
Fuse #23 “PWR OUTLET” – safeguards interior 12 V accessory sockets
Fuse #29 “PWR OUTLET FR” – dedicated to the front power outlet (cigarette lighter)

These are 15 A mini fuses located beneath the driver’s side dash. For blown fuse issues, Prius owners often report checking these three fuses first and replacing them with exact-match types