My 2004 Prius, the efi fuse blows everytime the engine is started. I read somewhere that the Module B in the relay box may be the cause (easy fix) so I replaced that but the problem persisted. When I unplug module B, the fuse doesn't blow but the engine wont stay on for long (I'm assuming that's because module B is unplugged).. Toyota Model: Prius 2007 Toyota Year: 2007 Location: Surrey; Posted August 11, 2014. Hello All,. I spoke to Konrad who is also a member here who said that you might have blown a fuse and most likely an EFI fuse. I had the same hunch as I said to him it feels like there is no fuel supply. My initial thoughts were fuel pump has packed up (i.
Toyota Prius mk2 - fuse box - engine compartment Instrument panel Toyota Prius mk2 - fuse box - instrument panel Luggage compartment. EFI: 15: Multiport fuel injection system/sequential multiport fuel injection system: 31: AM2: 15 "IGN" fuse, ignition system: 32: HORN: 10: Horn: 33: HEV: 20: Hybrid system: 34:. My 2003 Toyota Avalon kept on blowing the EFI #2 fuse. I tried looking up the diagram and apparently, there are quite a few things that route to this fuse. 1.) Fuel Injectors, 2.) Mass Airflow Sensor, 3.) Oxygen Sensors (there are three of these), 4.) EVAP System, 5.) Throttle Position Control System, and 6.) Engine Control System.