Toyota Prius 20 – fuse and relay

Toyota Prius 20 represents the 2nd generation of the Toyota Prius range produced in 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010. During this time, the model has been restyled. In this publication you will find information on the location of electronic control units, a description of fuses and relays Toyota Prius 20 with diagrams and their locations. Note the cigarette lighter fuse.

Toyota prius 20

This car has been delivered all over the world, there are models with both left and right steering positions. Therefore, the execution of the blocks and the purpose of the elements in them may differ from the one presented. Match the diagrams with your own, which are printed on the box cover.

Passenger compartment


General layout of boxes in the cabin

Location all box


  1. Navigation control unit
  2. Skid Control
  3. Fuse box
  4. Auxiliary relay (ACC)
  5. Body electrical control unit
  6. Heated mirror relay
  7. Socket relay
  8. Daytime running light relay
  9. Power supply control unit
  10. Smart Key Control Box
  11. Distribution block
  12. Tire pressure monitor
  13. Power steering control unit
  14. Network gateway block
  15. Key transponder unit
  16. Hybrid control unit
  17. The engine control unit
  18. Distribution block No. 2
  19. Headlight range control unit
  20. Transmission control unit
  21. Audio amplifier
  22. Air conditioner control unit
  23. Airbag unit

Fuse box

In the passenger compartment, the fuse box is located under the panel below, behind the protective cover.


Photo example of execution

Photo in

Photo diagram

2Gen prius 2004-2009 covery

Protected components

1 –
215A M / HTR – Heated mirrors
330A WIP – Windscreen wiper
415A RR WIP – Rear wiper
520A WSH – Glass washer
67,5A ECU-IG – Smart Access System with Start Button, Power Windows, Power Steering, Anti-theft System, Multi-Information Display
710A GAUGE – Instrument Cluster, Brake Lights, Hazard Lights, Power Windows
87,5A OBD – Diagnostic connector
97,5A STOP – Brake lights
1125A DOOR – Central locking
1225A ACC − B – Fuses: “POWER OUTLET”, “ACC”
1315A ECU − B – Multi – information display, power windows, air conditioning
157,5A AM1 – Hybrid system
1610A TAIL – Side light, license plate light
177,5A PANEL – Multi – information display, clock, audio system, instrument panel illumination
1810A A / C (HTR) – Air Conditioning
1920A FR DOOR – Window regulators
2315A PWR OUTLET – Socket
247.5A ACC – Audio system, multi-information display, clock
2915A PWR OUTLET FR – Socket
307,5A IGN – Hybrid system, immobilizer, SRS airbag system
31 –

Fuses 23 and 29 at 15A are responsible for the operation of the cigarette lighter.

Additional fuses and relays are attached to the side of the unit itself.





  1. 30A PWR – Power Windows
  2. 40A DEF – Heated rear window


  • R1- Ignition (IG1)
  • R2 – Heater (HTR)
  • R3 – Direction indicators (hazard warning lights)

Additional elements


additional elements


  1. Classification system control unit
  2. Distribution block
  3. Central locking receiver
  4. Rear wiper relay
  5. Battery fan relay
  6. Antenna and receiver for tire pressure monitoring system
  7. Power fuse box
  8. Battery control unit
  9. Main relay

Power fuse box

fusible link

It is located in the luggage compartment on the positive battery terminal.

Photo 3


Diagram 2


  1. 5A DC / DS-S – Inverter and Converter
  2. 120A MAIN – Hybrid System

Engine compartment


General arrangement of boxes under the hood

Location 2


  1. Fuse and relay box
  2. Headlamp control unit (2003-2005)
  3. Headlamp control unit (2003-2005)
  4. Relay box

Fuse and relay box

Located on the left side of the engine compartment.

Photo 2

Example of a diagram from the box cover

diagram 2004


Diagram 3

Protected components

130A Spare fuse
215A Spare fuse
37, A DRL – Daytime running lights
410A H − LP LO RH -Halogen bulbs: Low beam right
15A H − LP LO RH – Discharge lamps: Low beam right
510A H-LP LO LH – Halogen bulbs: Low beam left
15A H-LP LO LH – Discharge lamps: Low beam left
610A H − LP HI RH – High beam right
710A H − LP HI LH – High beam left
815A EFI – Multiport fuel injection system / sequential multiport fuel injection system
915A AM2 – Ignition, fuse: “IGN”
1010A HORN – Sound signal
1120A HEV – Hybrid system
127,5A P CON MAIN – Immobilizer, parking brake control system
1330A P CON MTR – 2003-2004: Parking brake control system
25A ABS − 1 – 2003-2009: ABS
1410A ETCS – Throttle Control System
1510A BATT FAN – High voltage battery fan
1610A HAZ – Direction indicators, hazard warning lights
1715A DOME – Audio system, interior lighting, instrument cluster, direction indicators, luggage compartment lighting, clock, smart access system with start button
1815A ABS
1910A ABS
2010A ABS
2115A FR FOG – Fog light
2210A CHS W / P
2330A AMP – Audio system
2430A PTC HTR2 – Auxiliary heater (PTC)
2530A PTC HTR1 – Auxiliary heater (PTC)
2630A CDS FAN – Cooling fan
2960A P / I – Fuses: “AM2”, “HEV”, “EFI”, “HORN”
3040A HEAD MAIN – Headlight relay
3230A ABS-1 – ABS MTR Relay
3330A ABS
35100A DC / DC – PWR relay, side light relay, ignition relay (IG1), fuses: “ACC-B”, “ESP”, “HTR”, “RDI”, “PS HTR”, “PWR OUTLET FR”, ” ECU-B “,” OBD “,” STOP “,” DOOR “,” FR DOOR “,” DEF “,” AM1 “
3850A PS HTR – Air Conditioner
3930A RDI – Engine control unit, cooling fan, hybrid system
4040A HTR – Air conditioning (heater), hybrid system
4150A ESP
R1ABS (ABS No.2)
R3Headlights (H-LP)
R5Parking brake control system (P CON MTR)
R6Cooling fan (FAN No.3)
R7Cooling fan (FAN No.2)
R9ABS (ABS No.1)

Relay box



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


If you have any questions or have something to add – write in the comments.

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