Need to know where the C/OPN relay is, with image if possible

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by TheSnowSnake, May 22, 2015.

  1. TheSnowSnake

    TheSnowSnake Junior Member

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    Yes I have the cover for the fuse panel and your right about ECU. I have it exposed and see no damage. I assume that in the little fender bender something happened that we have not found YET.
     
  2. TheSnowSnake

    TheSnowSnake Junior Member

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    I have the electric wiring manual and understand the process right up to the ready light.

    Now at this point what ECU is not working right?

    Quote
    3. Hybrid Start–Up Operation (READY)
    When the electrical key turns on half–inserted SW and deep–inserted SW after inserting in the key slot, transponder key
    computer activates transponder key amplifier incorporated in key slot to identify ID. After the identification, if power SW is
    pushed with depressing brake pedal, power source control ECU starts. The ECU confirms that the brake pedal is depressed
    from signal of stop light SW and also requests transponder key computer for ID identification result. If the ID identification is
    normal, the ECU turns on ACC relay, IG1 relay and IG2 relay, and changes indicator of power SW to amber lighting. Power
    supply is IG ON condition then.
    After that, power source control ECU sends start–up signal to hybrid vehicle control ECU. Hybrid vehicle control ECU and
    transponder key computer make communication for start–up permission. Hybrid vehicle control ECU controls to start–up
    hybrid system (READY).
    At starting up hybrid system, power source control ECU controls to light off indicator of power SW.

    End Quote
    Any suggestions what to probe or test
     
  3. ChapmanF

    ChapmanF Senior Member

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    While I don't have a Gen 2, I have picked up along the way a paper copy of the 2004 New Car Features Manual (which is also one of the manuals you can view on techinfo.toyota.com).

    Patrick mentioned way back when that your codes indicated communication trouble between the battery ECU and the ECM, and between the combination meter and the Gateway ECU.

    Page TH-42 of the New Car Features Manual shows that the ECM and battery ECU are both on the CAN, while the Gateway ECU forwards messages between three networks: the CAN, the BEAN (which the meter ECU is on), and the AVC-LAN (for the multi-display, though you didn't seem to have any codes for a problem there).

    That's just the big network overview picture from the New Car Features Manual. To find the actual wiring and connectors involved, the Wiring Diagram Manual could be your next stop.

    -Chap
     
  4. ChapmanF

    ChapmanF Senior Member

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    Also in the New Car Features Manual there's a much more detailed introduction to all three networks, pages BE-47 to BE-66. I can't make you look there, but if you don't, you like doing things the hard way. :)

    -Chap
     
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  5. dolj

    dolj Senior Member

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    Ha ha, that reminds me of an saying my dad use to say, "You can lead a mechanic to the manuals, but you can't make him read."

    Or something like that. :D
     
  6. TheSnowSnake

    TheSnowSnake Junior Member

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    I have the tech manual and wiring. Your Father was correct but reading them is not the problem. The Problem is the car was lightly taped in the rear. And the ice never ran again, so I'm still looking for physical damage. The wiring book is my best clue but knowing the output of each line in all the different modes is what I'd like. Say as a example on engine controller at 20 MPH line point 8 goes from 0 to 12 volts and if not trace backward to the controller that controls that. OK am I weird or what. MG1 has not turned that I'm aware of. And the wiring diagrams say 12 volt battery goes to starter. I know is not a conventional starter but interesting. Checking that line now.
    upload_2015-6-14_9-17-48.jpeg
     
  7. ChapmanF

    ChapmanF Senior Member

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    Have you read the section on 'multiplex communication' in your New Car Features Manual?

    Is it possible that you might?

    -Chap
     
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  8. TheSnowSnake

    TheSnowSnake Junior Member

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    No I have'nt read that yet..
    Where can I find it on the cheap. I don't have a membership to toyota books
     
  9. TheSnowSnake

    TheSnowSnake Junior Member

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    I think you said yours is paper back. That might be a good thing to get some of theses manuals in print.
    Just off hand do you guys have another way of chatting,,,Like teamspeak radcall, skype. whatever it just takes so damn long to type out general questions.
     
  10. ChapmanF

    ChapmanF Senior Member

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    It might not be your favorite arrangement, but reality is that when you're looking for technical information on your Toyota, techinfo.toyota.com is where that is. Usually the car itself is enough of an investment that another $15 at techinfo doesn't seem extravagant for the hours of work and hundreds or thousands of dollars of possible mistakes it will save us.

    If you like the paper version (it's the same manual either way), you can watch the bay of E, they'll occasionally pop up. Just look for "2004 prius new car features" or the publication number NCF255U. Eventually you can score one that way, but your time is worth something too.

    -Chap
     
  11. ChapmanF

    ChapmanF Senior Member

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    The three main repair manual volumes (and the wiring manual, which you say you already have) are still available through the official channel, Helm, Inc., if you want to get them that way. Vols. 1 and 2 are original printings, the volume 3 is a reproduction.

    -Chap
     
  12. Sergei Shek

    Sergei Shek New Member

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    @TheSnowSnake did you ever figure out the issue? Im having the same problem. Bought the 05 one from insurance auction with slight rearend damage and having same problem as you with code U0100 and i believe P3000.
     
  13. Avi's Advanced Automotive

    Avi's Advanced Automotive Independent hybrid repair shop

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    You have a battery problem. There should be another code for something battery related.

    Posted via the PriusChat mobile app.
     
  14. bisco

    bisco cookie crumbler

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    try me on teamspeak
     
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