The third-generation Prius (the name "Prius" literally translating to "to go before" in Latin) once again demonstrates engineering excellence by offering innovative technologies designed to reduce fuel consumption and environmental impact. While retaining its five-door hatchback configuration, this generation achieves superior performance and efficiency—delivering up to 32.6 km/L—thanks to an aerodynamically refined body (reducing the drag coefficient to 0.25) and a hybrid system that was 90% redesigned. Furthermore, its design extends beyond lowering fuel demand to harnessing auxiliary energy sources; for example, a solar panel integrated into the glass sunroof converts solar energy directly into electrical power.
This article provides detailed fuse box diagrams and relay location guides for the third-generation Toyota Prius (chassis codes ZVW30, ZVW35; New MC platform), covering model years 2009, 2010, 2011, 2012, 2013, 2014, and 2015.
Passenger Compartment
Component Locations: 1. Wiper relay, 2. Main Body ECU (Body Electrical Control Unit), 3. Fuse box / Junction block, 4. Stop lamp relay, 5. Electric Power Steering (EPS) ECU, 6. Rear fog light relay, 7. LHD: Panel relay, 8. Turn signal / Hazard flasher relay, 9. Junction block, 10. Junction block, 11. Pre-collision seat belt ECU, 12. Driver assistance system ECU, 13. Headlight leveling ECU, 14. Parking assist ECU, 15. Shift control ECU, 16. Power management ECU, 17. Solar ventilation relay, 18. Audio amplifier (Before Dec. 2011), 19. Audio amplifier (From Dec. 2011), 20. Solar ventilation A/C blower ECU, 21. Airbag ECU (SRS), 22. Junction connector, 23. A/C amplifier (Air conditioning ECU), 24. Auxiliary fuse box, 25. RHD: Double door lock relay.
Passenger Compartment Fuse Box
Fuse box location (RHD models)
Fuse box location (LHD models)
Main passenger compartment fuse box overview.
| Diagram | ||
|---|---|---|
|
||
| No. | Circuit Protected / Description | Rating (A) |
| 1 | Power Outlet / Cigarette Lighter | 15 |
| 2 | Multiplex Communication System (CAN), power mirrors, driver assistance system, audio system, navigation system | 10 |
| 3 | Power Outlet | 15 |
| 4 | Not used | - |
| 5 | Seat heaters | 10 |
| 6 | Not used | - |
| 7 | Seat heaters | 10 |
| 8 | Power door locks | 25 |
| 9 | Not used | - |
| 10 | Pre-collision seat belts | 30 |
| 11 | Power seat, power lumbar support | 30 |
| 12 | RHD: Double door lock system | 25 |
| 13 | Before Dec. 2011: Front fog lights | 15 |
| From Dec. 2011: Front fog lights | 7.5 | |
| 14 | Power seat, power lumbar support | 30 |
| 15 | On-Board Diagnostics (OBD2 / DLC) | 7.5 |
| 16 | Not used | - |
| 17 | Rear fog lights | 7.5 |
| 18 | Not used | - |
| 19 | Stop lights, center high-mount stop light (CHMSL), brake control system, power windows, driver assistance system, emergency stop signal | 10 |
| 20 | Not used | - |
| 21 | Power windows | 25 |
| 22 | 25 | |
| 23 | Not used | - |
| 24 | Power windows | 25 |
| 25 | 25 | |
| 26 | Power sunroof | 30 |
| 27 | Electric cooling fans, Multiplex Communication System | 10 |
| 28 | Driver assistance system, pre-collision seat belts, auto-dimming rearview mirror, yaw rate and G-sensor, brake system, Electric Power Steering (EPS), navigation system, power sunroof, seat belt pretensioners, audio system, hazard lights, turn signals, windshield wipers, headlight washers | 10 |
| 29 | Not used | - |
| 30 | Headlight leveling system, front passenger seat belt reminder, instrument cluster and gauges | 10 |
| 31 | Air conditioning system, solar ventilation system, remote A/C system | 10 |
| 32 | Windshield washer | 15 |
| 33 | Rear window wiper and washer | 20 |
| 34 | Windshield wipers | 30 |
| 35 | Not used | - |
| 36 | Instrument cluster and gauges | 7.5 |
| 37 | Brake system, driver assistance system, Multiport Fuel Injection (MFI) / Sequential Multiport Fuel Injection (SFI) system, SRS airbag system, occupant detection system, power windows, Smart Key system | 10 |
| 38 | Air conditioning system, hazard lights, seat heaters, transmission control, shift position switch (P position), navigation system, solar ventilation system, remote A/C, Intelligent Parking Assist, headlight washers, front passenger seat belt reminder, headlight leveling system, glove box light, clock, audio system | 10 |
| 39 | Headlight leveling system, parking lights, tail lights, license plate lights, rear fog lights, front fog lights | 10 |
Auxiliary Fuse Box
(Item #24 in the component location diagram)
| Diagram | ||
|---|---|---|
|
||
| No. | Circuit Protected / Description | Rating (A) |
| 1 | Cruise control system, radar cruise control sensor, Engine Control Module (ECM) | 10 |
| 2 | Not used | - |
Engine Compartment
Component Locations:
- Main fuse box / Relay block,
- Engine Control Module (ECM),
- Inverter with DC-DC converter,
- Headlight washer relay,
- RHD: Brake control ECU,
- LHD: Brake control ECU
Engine compartment location.
Main fuse block overview.
| Diagram | ||
|---|---|---|
|
||
| No. | Circuit Protected / Description | Rating (A) |
| 1 | Anti-lock Braking System (ABS) | 7.5 |
| 2 | Engine cooling system | 30 |
| 3 | Horn | 10 |
| 4 | Not used | - |
| 5 | Anti-lock Braking System (ABS) | 20 |
| 6 | Multiport Fuel Injection (MFI) / Sequential Multiport Fuel Injection (SFI) | 10 |
| 7 | Turn signal lights | 10 |
| 8 | Air conditioning system (A/C) | 10 |
| 9 | Telematics control module | 10 |
| 10 | Smart Key system / Smart Entry and Start | 7.5 |
| 11 | Power Management Control System | 7.5 |
| 12 | Shift lever, Shift Control ECU | 7.5 |
| 13 | Inverter / DC-DC Converter | 5 |
| 14 | Fuses: "PCU", "IGCT NO. 2", "IGCT NO. 3" | 30 |
| 15 | Before Dec. 2011: Audio system | 30 |
| From Dec. 2011: Audio system | 30 | |
| 16 | Fuses: "ECU-B", "RAD NO. 1", "DOME" | - |
| 17 | Audio system, navigation system | 30 |
| 18 | Daytime Running Lights (DRL) | 7.5 |
| 19 | High-beam headlights, daytime running lights (DRL) | 20 |
| 20 | Cooling system | 10 |
| 21 | Multiport Fuel Injection (MFI) / Sequential Multiport Fuel Injection (SFI) | 10 |
| 22 | Right-hand headlight (high beam) | 10 |
| 23 | Left-hand headlight (high beam) | 10 |
| 24 | Smart Key system, Multiplex Communication System, alarm system, map lights, instrument cluster/gauges | 7.5 |
| 25 | Door scuff illumination, map lights, dome light, footwell lights, vanity mirror lights, auto-dimming rearview mirror, Electric Power Steering (EPS) | 10 |
| 26 | Audio system, navigation system | 15 |
| 27 | Heated outside mirrors | 10 |
| 28 | Hybrid system, parking assist system, power windows, power management, inverter / DC-DC converter, MFI/SFI fuel injection system | 10 |
| 29 | Inverter / DC-DC Converter | 10 |
| 30 | MFI/SFI fuel injection system, fuel system, fuses: "MET", "IGN" | 20 |
| 31 | Hybrid battery cooling fan | 10 |
| 32 | MFI/SFI fuel injection system, cooling system, fuse: "EFI NO. 2" | 20 |
| 33 | Not used | - |
| 34 | Headlight washers | 30 |
| 35 | Not used | - |
| 36 | Electric cooling fans | 30 |
| 37 | Electric cooling fans | 30 |
| 38 | Air conditioning system (A/C) | 50 |
| 39 | Shift lever, Shift Control ECU | 30 |
| 40 | Electric Power Steering (EPS) | 60 |
| 41 | Fuses: "IG2", "EFI MAIN", "BATT FAN" | 60 |
| 42 | Anti-lock Braking System (ABS) | 30 |
| 43 | 30 | |
| 44 | Parking control system, horn, RH headlight (low beam), LH headlight (low beam), reverse lights | 40 |
| 45 | From Nov. 2011: Left-hand headlight (low beam) | 15 |
| 46 | Until Nov. 2011: Right-hand headlight (low beam) | 15 |
| Relays | ||
| R1 | Engine cooling fan relay | |
| R2 | Cooling fan relay | |
| R3 | Shift control relay | |
| R4 | Cooling fan relay | |
| R5 | Engine immobilizer / Anti-theft relay | |
| R6 | Dimmer / DRL relay | |
| R7 | Power management ECU relay | |
| R8 | Cooling fan relay | |
| R9 | Until Nov. 2011: Not used | |
| From Nov. 2011: Daytime running lights (DRL) relay | ||
| R10 | From Nov. 2011: Not used | |
|
||
| 1 | Integrated relay (DC/DC), "TAIL" relay, "P/POINT" relay, "ACC" relay, "IG1 NO. 1" relay, "IG1 NO. 2" relay, "IG1 NO. 3" relay; Fuses: "HTR", "RDI", "CDS", "S-HORN", "ENG W/P", "ABS MAIN NO. 2", "H-LP CLN", "FR FOG", "PWR SEAT FL", "OBD", "STOP", "RR FOG", "DBL LOCK", "PWR SEAT FR", "DOOR NO. 1", "PSB", "D FR DOOR", "P FR DOOR", "DOOR RL", "DOOR RR", "S/ROOF" | 125 |
Luggage Compartment
Component Locations:
- Sunroof Control ECU,
- Door Control Receiver (Keyless Entry Receiver),
- Luggage Compartment Power Fuse Block,
- Power Distribution Block,
- 12V Battery Voltage Sensor,
- Tire Pressure Monitoring System (TPMS) ECU
| Power Fuse Box (#3 in diagram) | ||
|---|---|---|
|
||
| No. | Circuit Protected / Description | Rating (A) |
| 1 | Fuses: "DC/DC", "DRL", "AMP", "AMP NO. 1", "AMP NO. 2", "H-LP HI MAIN", "EPS", "ABS MTR 1", "ABS MTR 2", "DC/DC-S", "P/I 2", "ECU-B2", "AM2", "ECU-B3", "TURN & HAZ", "P CON MAIN", "SHORT PIN", "ABS MAIN NO. 1", "P-CON MTR", "MAYDAY", "ETCS", "IGCT", "P/I 1" | 140 |