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Need Power / Ground Schematic for MFD

Discussion in 'Gen 2 Prius Main Forum' started by germanaudiotech, Oct 21, 2018.

  1. germanaudiotech

    germanaudiotech Junior Member

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    Hopefully someone can help me figure out how to power on the heads-up display (multi function display - MFD). I have 2 white plugs, which wires are the Power and Ground? 2006 - 2009 Prius
     
    #1 germanaudiotech, Oct 21, 2018
  2. bisco

    bisco cookie crumbler

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    welcome!

    if not, it should be available at tech info.toyota.com
     
    #2 bisco, Oct 21, 2018
  3. germanaudiotech

    germanaudiotech Junior Member

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    If someone has this information it would be very helpful
     
    #3 germanaudiotech, Oct 21, 2018
  4. Elektroingenieur

    Elektroingenieur Senior Member

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    If you’re in Los Angeles—or any other community where the local public library subscribes to the ChiltonLibrary service—you can get the pages from the Electrical Wiring Diagram books for model years 2012 and earlier for free. Start with this link: https://www.lapl.org/chilton
     
    #4 Elektroingenieur, Oct 21, 2018
  5. germanaudiotech

    germanaudiotech Junior Member

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    Dang, I haven't been to a public library since the 90s
     
    #5 germanaudiotech, Oct 21, 2018
  6. edthefox5

    edthefox5 Senior Member

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    3 connectors on back of mfd
    The one that has power has the 6 big pins across the top. That’s m13
    Has 26 pins. Pin 1 is on the left of the cable connector.

    Pin 1. Ground
    Pin 2. ACC
    3. B+1
    10. Ignition

    Let us know if it lights up. It won’t do anything without gateway ecu data
    Though.
     
    #6 edthefox5, Oct 22, 2018
    germanaudiotech likes this.
  7. germanaudiotech

    germanaudiotech Junior Member

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    Thanks for the reply. I am trying to get it to show anything on the screen and test touch-commands. Even a Toyota startup logo if possible.
     
    #7 germanaudiotech, Oct 22, 2018
  8. edthefox5

    edthefox5 Senior Member

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    Well those are the power pins. I doubt it will do much without comm to the gateway.

    Ground pin 1 and apply 12 volts to pin 3 & 10.
     
    #8 edthefox5, Oct 22, 2018
  9. ChapmanF

    ChapmanF Senior Member

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    My guess is it'll do pretty much everything it doesn't need gatewayed data to do. So the mileage barchart won't be very interesting. :)

    I've got a 7" Denso unit from a 2012 sitting on a shelf with battery and ground, and it will happily power up, play CDs/DVDs/MP3s, tell me I don't have any radio or XM stations, and show me on a map the last place it thought it was when a GPS antenna was connected....

    -Chap
     
    #9 ChapmanF, Oct 22, 2018
  10. germanaudiotech

    germanaudiotech Junior Member

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    Its not lighting up..
     

    Attached Files:

    #10 germanaudiotech, Oct 22, 2018
  11. germanaudiotech

    germanaudiotech Junior Member

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    Nevermind, got it.

    Pin 14 is illumination
     

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    #11 germanaudiotech, Oct 22, 2018
  12. kenneth winter

    kenneth winter Junior Member

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    Hey EdtheFox.
    I used this information from year ago to trouble shoot my MDF. I found I have no ground on the PIN 1. brown wire.. it actually has 8.3 volts.?? How do I track down the brown wire fault?
     
    #12 kenneth winter, Dec 13, 2023
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