2004 Toyota Prius Relay Diagram

Fuse box diagram (fuse layout), location, and assignment of fuses and relays Toyota Prius (XW20) (2003, 2004, 2005, 2006, 2007, 2008, 2009).

Checking and Replacing Fuses

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.

• Turn the "POWER" switch to OFF mode and turn off all electrical accessories.
• Open the fuse box cover.
• See diagrams below for details about which fuse to check.
• Remove the fuse.
• Check if the fuse is blown – if the thin wire inside is broken, the fuse has blown.
• Replace the blown fuse with a new fuse of an appropriate amperage rating.

Notice

• Never use a fuse of a higher amperage rating than that indicated, or use any other object in place of a fuse, even as a temporary fix. This can cause extensive damage or even fire.
• Always use a genuine Toyota fuse or equivalent.
• Do not modify the fuses or fuse boxes.
• If the replaced fuse blows again, have the vehicle inspected by any authorized Toyota dealer or repairer, or another duly qualified and equipped professional.

---

Passenger Compartment

1. Navigation ECU
2. Skid Control ECU
3. Fuse Box
4. ACC Relay
5. Body ECU
6. Mirror Heater Relay
7. Power Outlet Relay
8. Daytime Running Light Relay
9. Power Source Control ECU
10. Smart Key ECU
11. Center Connector №1
12. Tire Pressure Warning ECU
13. Power Steering ECU
14. Gateway ECU
15. Transponder Key Computer
16. Hybrid Vehicle Control ECU
17. Engine Control Module
18. Center Connector №2
19. Headlight Beam Level Control ECU
20. Transmission Control ECU
21. Stereo Component Amplifier
22. A/C Control Assembly
23. Airbag Sensor Assembly

1. Occupant Classification ECU
2. Overhead J/B
3. Door Control Receiver
4. Rear Wiper Relay
5. Battery Fan Relay
6. Tire Pressure Warning Antenna and Receiver
7. Fusible Link Block
8. Battery ECU
9. System Main Relay

Passenger Compartment Fuse Box Diagram

The fuse panel is located under the driver's side of the dashboard. Remove the lid.

№	Fuse	A	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	-	-	-

№	Fuse	A	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

It is in the trunk on the 12V battery positive terminal. Remove the cover.

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

---

Engine Compartment

1. Fuse Box
2. Headlight Control ECU LH (2003-2005)
3. Headlight Control ECU RH (2003-2005)
4. Relay Box

Engine Compartment Fuse Box Diagram

Push the tabs in and lift the lid off.

№	Fuse	A	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)
		15	with discharged headlight: Right−hand headlight (low beam)
5	H-LP LO LH	10	with halogen headlight: Left−hand headlight (low beam)
		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
	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 №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 №3)
R7	Electric cooling fan (FAN №2)
R8	Anti−lock brake system (ABS MTR)
R9	Anti−lock brake system (ABS №1)

Additional 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 №4)
R6	CHS W/P
R7	-

---

This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Cookie settingsACCEPT

Posted by: georgeaboutyesp.blogspot.com

Source: https://fusecheck.com/toyota/toyota-prius-xw20-2003-2009-fuse-diagram