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high voltage battery

Discussion in 'Gen 3 Prius Technical Discussion' started by barnabas, Apr 2, 2021.

  1. barnabas

    barnabas Junior Member

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    Has anyone left their gen 3 Prius sit for 6 months without being started? The Toyota Service Bulletin T-SB-0152-09 says to disconnect the exclusive jump start wiring harness from the terminal at the fuse box. I did not see a wiring harness that I could tell would be the right one. There is a cable with two conductors that comes out of the back of fuse box that goes to the fire wall, is that it?
    To disconnect he 12 battery that is simple enough. I am concerned about the HV battery discharging over that length of time.

    Thanks in advance

    Barn
     
    #1 barnabas, Apr 2, 2021
  2. ChapmanF

    ChapmanF Senior Member

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    Can you clarify what part of T-SB-0152-09 is the part you're referring to here?
     
    #2 ChapmanF, Apr 2, 2021
  3. PriusCamper

    PriusCamper Senior Member

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    Just disconnect the 12v, that's way simpler than Toyota's method which is the standard they use for shipping new vehicles. As for the Hybrid battery, NiMH batteries by their very nature self discharge, so you can't avoid that. But it might help to remove the Orange service plug, which will isolate each module so the discharge might be slightly less if you have a really old hybrid system.

    Also before you shut down car you can force charge hybrid battery by putting your foot on the brake and other foot pushes gas pedal to floor while car is in drive. This will charge your pack up as full as possible without needing to spend money on charging gear.
     
    #3 PriusCamper, Apr 2, 2021
  4. barnabas

    barnabas Junior Member

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    On page 1 the bulletin says for storage over 10 days.
     
    #4 barnabas, Apr 2, 2021
  5. ChapmanF

    ChapmanF Senior Member

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    Where's the part about disconnecting the exclusive whatever whatever?
     
    #5 ChapmanF, Apr 2, 2021
    Grit likes this.
  6. bisco

    bisco cookie crumbler

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    ask someone to drive it once a week. disconnecting the 12v isn't going to help the hybrid bat
     
    #6 bisco, Apr 2, 2021
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