Only Front Stereo Speakers Work on Gen 2. Wondering if Likely Related to Recent Replacement of MFD.

Discussion in 'Gen 2 Prius Audio and Electronics' started by harrafox, Aug 11, 2018.

  1. harrafox

    harrafox New Member

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    Recently replaced the MFD on our Gen 2 Prius dues to the existing unit having a faded out screen. Got same model as existing. Also replaced the 12V battery recently. Tried the stereo today for the first time in awhile and believe only the front center / dash speakers are working, very tinny and not very loud sound without cranking the volume. Don't know if this was already an issue prior to MFD replacement, but wondering if it could be something to do with the replacement MFD, connectors, or what the most likely issue is? Also, possibly hearing a very high-pitched "squealing" noise. I've read about "head units", but don't know what that is. Basically, we're getting ready to sell this Prius and just want to get it in the best shape possible with the least amount of money put in. Already spent over $500 (MFD, A/C Vents, Trunk Hatch Switch, Battery, Driver's Door Handle) and not looking to put in a bunch more. Thanks
     
  2. bisco

    bisco cookie crumbler

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    could be defective, but hopefully just a bad connection. where did you get it?
     
  3. harrafox

    harrafox New Member

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    The MFD? Private seller on eBay.
     
  4. bisco

    bisco cookie crumbler

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    anything is possible, i guess. you would have to test the outputs.
     
    #4 bisco, Aug 13, 2018
    Last edited: Aug 13, 2018
  5. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    Toyota uses one connector for the front speakers (and system power) and a second connector for rear speakers. Sounds like they left one loose.
     
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  6. jakester24

    jakester24 Junior Member

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    My rear speakers went out a couple of months ago. Now all I'm getting is a tinny sound out of my front speakers. My radio station also resets periodically. Could all of this be related to loose connections in the MFD? Did you have any success figuring out your issue? Thanks!
     
  7. SFO

    SFO Senior Member

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    Welcome to PriusChat!!

    Have you checked the 12v battery voltage lately?
     
  8. jakester24

    jakester24 Junior Member

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    I just checked, and I'm getting 11.6v.
     
  9. SFO

    SFO Senior Member

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    Little on the low side, how old is this 12v battery?

    How many minutes/hours per week do you use the vehicle?

    You might try tickle charging with a smart charger.

    Can also leave it in 'ready mode' for 10 hours or so, which should charge the battery.

    If the battery fails to hold a charge after either of the above, then it would be time to replace.
     
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