Slow downs in head unit and function

Discussion in 'Gen 4 Prius Technical Discussion' started by Wraiththe, Mar 10, 2023.

  1. Wraiththe

    Wraiththe Member

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    Location:
    Charlotte NC
    Vehicle:
    2017 Prius
    Model:
    IV
    My head unit seems to be slowing down with a bit of a hesitancy. Also the voice commands do not work a lot of the time. (to add, I am getting 6 miles per gallon less. Is it all connected? Any thoughts.

    2017 loaded prius 4
     
  2. AzWxGuy

    AzWxGuy Weather Guy

    Joined:
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    Location:
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    Vehicle:
    2021 Prius
    Model:
    Limited
    If its a JBL head unit you might try holding the power button for the head unit ON for a couple seconds which might elicit a restart. The power button on my car is marked Audio. That might be a standard procedure back to a 2017, don't know. We always have to ask about your 12 volt battery health whenever electrical shenanigans appear. The Gen IV auxiliary battery is more robust than the earlier generation motorcycle battery but still subject to aging. If it's OEM you might have it load tested to eliminate that possibility. An mpg drop might also be an indicator of 12V battery troubles as the system continuously tries to charge the battery by running the ICE more often.
     
  3. sam spade 2

    sam spade 2 Senior Member

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    Certainly worth having the 12 V battery tested.......but it would have to be in REALLY bad shape before excess charging time would have a noticeable impact on your fuel mileage.

    A loose main cable connection might be a more likely culprit.
     
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