Audio amplifier sound comes and goes / inconsistent (2013 Gen 3)

Discussion in 'Gen 3 Prius Audio and Electronics' started by ttzprius, Sep 18, 2021.

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  1. ttzprius

    ttzprius Junior Member

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    Vehicle:
    2008 Prius
    Model:
    N/A
    Similar to others here, I have a 2013 Gen 3 in which the amplifier under the passenger seat inconsistent stops working / cuts out.

    Most of the time I can get it working again by unplugging and replugging its power connector, but sometimes this doesn't work. (Note: when I do this, I can hear the speakers gently "pop", so power is definitely being fed from the amp to the speakers.)

    So I presume there is a wiring, circuit, or heat issue somewhere, either in the amp or the speakers.

    Does anyone have any tips on how to diagnose the problem? Other than getting a used amp here or on eBay...

    Thanks!
     
    #1 ttzprius, Sep 18, 2021
  2. ttzprius

    ttzprius Junior Member

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    #2 ttzprius, Sep 20, 2021
  3. ttzprius

    ttzprius Junior Member

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    2008 Prius
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    Same problem as this post (2015 Prius 4 No Audio Output | PriusChat)
    • No sound
    • Pressing the volume controls on the steering wheel or twisting the knob no longer displays anything on the head unit (HU)
    • Neither the voice activation button nor the head unit buttons create a beeping noise
    • B15D3 and B15C3 errors
    • When I DO get the amp working (by unplugging and replugging it), it will often cut out if the volume is too high
     
    #3 ttzprius, Sep 20, 2021
  4. ttzprius

    ttzprius Junior Member

    Joined:
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    Location:
    Ann Arbor
    Vehicle:
    2008 Prius
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    For others, here are some links regarding the B15C3 and B15D3 errors:
    • I can't post links yet, but do a Google search for "toyota B15D3" and pick the tovenza links
     
    #4 ttzprius, Sep 20, 2021
  5. C. Davis

    C. Davis Junior Member

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    Location:
    Austin Texas
    Vehicle:
    2011 Prius
    Model:
    Two
    I have a 2011 Prius. The JBL factory unit would not play CDs and then lately the touchscreen would not work. I replaced it with a Kenwood unit and a Metra Axess adapter module. It all worked fine for several months. Now about half the time the amplifier will not turn on. Some days the stereo has no sound. Other days it works. I can pull the radio fuse under the hood and it will work for a half day to 2 days then not turn on again. If I don't hear the soft thump of the amp coming on, I know it won't work. Does anyone have an experience similar to this and what is the solution?
     
    #5 C. Davis, Jan 3, 2025
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