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Main battery question

Discussion in 'Generation 1 Prius Discussion' started by tym2brn, May 18, 2012.

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  1. tym2brn

    tym2brn New Member

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    Does the Main battery have anything to do with starting my prius?
    Reason I am asking is I replaced My Main battery today with another battery I had from a prius I wrecked 6 months ago..Car will not turn over now...The main battery light is on now,before it was not..Also Main Battery is showing one bar on the dash...Thanks Mark
  2. gmcneil05

    gmcneil05 Junior Member

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    The battery might need to be charged out of the car before installing.
  3. tym2brn

    tym2brn New Member

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    How is this done? I called toyota and I was told they couldn't charge it...Thanks Mark
  4. Danny Hamilton

    Danny Hamilton Active Member

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    Yes. The Prius uses the High Voltage (HV) traction battery to power MG1. When the Prius is stationary, MG1 is used as a starter motor to "turn over" the Internal Combustion Engine (ICE). If that battery is drained too far, you will need special charging equipment to charge it back up. For most people, this means making arrangements with their local Toyota dealer to have them charge it up for you. They may not have the charging equipment on hand, and may need to transport it from some other dealership.
  5. tym2brn

    tym2brn New Member

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  6. usnavystgc

    usnavystgc Die Hard DIYer

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    Are you sure the service plug is reinstalled correctly? I've seen this posted here on several occasions and that almost always turned out to be the problem. See this post (#9 and beyond) http://priuschat.com/forums/gen-ii-...-replacing-bad-cell-in-main-battery-pack.html.
  7. tym2brn

    tym2brn New Member

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    I pulled the battery out of the car yesterday and checked the volts on the individual cel's. low was 1.57 high was 4.78. I knew I was having problems on cel block #7 on my old battery. so removed the tin to examine it and one of the cel's on block #7 had blown up. I replaced block #7 with two battery cel's from the battery back I took out of the wrecked prius..Car runs now,cleared all the codes, they have not come back on yet..
  8. usnavystgc

    usnavystgc Die Hard DIYer

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    Good deal!!! :)
  9. tym2brn

    tym2brn New Member

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    codes are back on...cel block #7 is weak...
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