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05 intermittently NOT starting....before & after Brand new Battery

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by bshef, Jun 10, 2020.

  1. bshef

    bshef Active Member

    Joined:
    Jun 6, 2004
    510
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    Location:
    OC So. Calif.
    Vehicle:
    2005 Prius
    Model:
    II
    I'm Stumped. 2005 197k miles....
    Thought I had a bad 12v due to never driving during this covid thing.
    Purchased brand new OEM 12v AGM from dealer ($210). Installed it.
    Drove it around for 10 miles or so.
    parked it, turned car off.... stepped out and noticed the Smart key would not work, by either the door button and also the keyfob (no go).
    Than walked to rear hatch and that smart key button also did not work.
    Got back in the car and tried powering on....NOTHING.
    Waited 10 seconds, tried again and it started.
    What the Heck is going on??
    Thoughts?
     
    #1 bshef, Jun 10, 2020
  2. SFO

    SFO Senior Member

    Joined:
    Feb 7, 2017
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    Location:
    Northern California
    Vehicle:
    2007 Prius
    Model:
    N/A
    How is the FOB battery health?
     
    #2 SFO, Jun 10, 2020
    bshef likes this.
  3. bshef

    bshef Active Member

    Joined:
    Jun 6, 2004
    510
    76
    1
    Location:
    OC So. Calif.
    Vehicle:
    2005 Prius
    Model:
    II
    hey SFO - it works.....easy to change out fob battery however, still doesn't explain why vehicle won't power on when hitting the power button intermittently.
     
    #3 bshef, Jun 10, 2020
  4. SFO

    SFO Senior Member

    Joined:
    Feb 7, 2017
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    Location:
    Northern California
    Vehicle:
    2007 Prius
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    N/A
    Did you already use a voltmeter to measure the 12v under the hood at the jump points?

    Is the SKS button under the steering wheel out?
     
    #4 SFO, Jun 10, 2020
    Raytheeagle and bshef like this.
  5. bshef

    bshef Active Member

    Joined:
    Jun 6, 2004
    510
    76
    1
    Location:
    OC So. Calif.
    Vehicle:
    2005 Prius
    Model:
    II
    Thanks for that (great suggestions)...negative on both accounts (oops).
    I need to run over to friends house to use his voltmeter.
    I'll report back
     
    #5 bshef, Jun 10, 2020
  6. bshef

    bshef Active Member

    Joined:
    Jun 6, 2004
    510
    76
    1
    Location:
    OC So. Calif.
    Vehicle:
    2005 Prius
    Model:
    II
    MYSTERY SOLVED (Scooby doo pulled the mask off the monster to reveal)....
    Bill Bixby....??
    no.....we looked at the newly installed battery....
    The Negative terminal wire and the ground wire were both completely loose.
    (smh).
    Glad this was a simple fix. Thanks for helping out!

    [​IMG]
     
    #6 bshef, Jun 10, 2020
    bisco and Raytheeagle like this.
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