Bench Testing a Gen 2 MFD

Discussion in 'Gen 2 Prius Audio and Electronics' started by ITBland, Aug 26, 2018.

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  1. ITBland

    ITBland Active Member

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    If you properly connect power on the six main wires on the M13 connector, it will boot up and work. I have confirmed this on a 86110-47081, I believe it will also work on the newer MFDs (86110-47230).

    On the 86110-47081, on the M13 connector, put
    12v+ on pins 1, 10,11, & 12 and
    GND on pins 2 & 3
    (NOTE: 86110-47081 can be found on base models (no camera, no Bluetooth) 2004-2009.)

    on a 86110-47230 (or any 2006-2009 hi-res screen), on the M13 connector, put
    12v+ on pins 2, 3, 10, & 12
    GND     on pins 1 & 11

    Putting a 5A fuse on the 12v+ power is a good safety measure, insulating the wires and pins is a must!
    The LCD creates high voltage, do not power up the MFD if its metal case is open!

    Doing this will probably sterilize kittens, cause your dog to run away, and turn your hair white. If you are not an experienced electronics technician, do not try this at home. (YMMV)


    *NOTE: Early 2004s may have part number 86110-47080, this will have the same M13 connections as 866110-47081.
    The 2004-05 navigation MFDs (86110-47070 (early 2004) and 86110-47071) also use the "lo-res" M13 pinout.

    "Hi-res" MFDs would include the following part numbers: 86110-47230, 86110-47220 (w/nav) and use the "hi-res" M13 pinout.

    I don't know about 86110-47210, if you know please post here, thanks!
     
    #1 ITBland, Aug 26, 2018
    Last edited: Aug 26, 2018
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  2. Cateran

    Cateran Junior Member

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    The 47210 is the Bluetooth version of the 47230. If you add the Bluetooth board, solder the RF base connector for the onboard antenna of the keypad and connect the RF coax cable from the Bluetooth board to the antenna, the 47230 will become the 47210.

    Normally, the impedance of the RF cable you need here is 50 ohm. It doesn't mean the resistance of a resistor. It means the RF transmission effective resistance of the device such as the cable, antenna or electronic devices which can't be easily measured by a normal multi-meter.
     
    #2 Cateran, Aug 27, 2018
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  3. ITBland

    ITBland Active Member

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    Thanks @Cateran !

    UPDATE:
    Verified That the 86110-47230 does work AND all you need is the Yellow and Gray power wires, and you can ground the metal case, so:
    for lo-res models (86110-47080, -47081, -47070, and -47071) connect pins 11 & 12 to 12v+ and ground the case,
    for hi-res models (86110-47210, -47230, and -47220) connect pins 2 & 3 to 12v+ and ground the case.
     
    #3 ITBland, Aug 27, 2018
  4. ArthurRama

    ArthurRama New Member

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    Just set up an account to confirm that connecting pins 2 & 3 to 12v+ and ground the case worked for 86110-47220.
    It booted up fine, buttons worked.

    The touch screen is not working though. I bought this item off of EBAY with basically no description, it may just be faulty. I wanted to fire it up before trying it on the car.

    Do you think touch screen would require all the connections, and it may work once it is all plugged in properly in the car? Or is more likely that the digitizer is dead?
     
    #4 ArthurRama, Feb 9, 2020
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  5. Nate Ocean

    Nate Ocean New Member

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    I have a 86110-47230 (pulled from salvage 2006 Prius) with similar results. That is, display comes on, and responds to side push buttons (CLIMATE, AUDIO, DISPLAY, INFO), but does *not* respond to touch screen in any manner. Is there an additional procedure to activate the touchscreen? I want to get into the diagnostic screens to test reverse camera feature. Since I can't use the "turn on the headlights three times" process to get to diagnostics, I could access the diagnostic modes using the DISPLAY button and the touch UL, touch LL (repeat 3x) procedure. But, alas, no touchscreen.

    What was the outcome of ArthurRama's experiment?
     
    #5 Nate Ocean, Sep 8, 2022
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  6. JahT

    JahT Member

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    If you still have no touchscreen, it can be replaced for about $20 and some time with a new digitizer glass from ebay.
     
    #6 JahT, Oct 13, 2022
  7. glenk

    glenk Member

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    I did this and it is not hard. You'll need the thin double stick tape if it is not supplied with the screen. My new screen didn't even require calibration.
     
    #7 glenk, Nov 9, 2022
  8. glenk

    glenk Member

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    Touch screen should work after the MFD comes up to its default display.
     
    #8 glenk, Nov 9, 2022
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