Auction 2008 prius will not go into Ready.

Discussion in 'Gen 2 Prius Technical Discussion' started by andy song, Dec 1, 2025 at 11:34 PM.

  1. andy song

    andy song Junior Member

    Joined:
    Jun 18, 2020
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    Location:
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    Vehicle:
    2011 Prius
    Model:
    Four
    Hi all

    Background

    Bought a 2008 Prius online at auction

    Received the car without a key

    Had locksmith program a fob

    Car turns on but will not go into Ready

    I tried to scan for codes but the OBD2 port was not getting power. Discovered the 7.5A fuse was blown. Replaced that and was able to scan

    Dr Prius shows the hybrid battery to be fine

    No error codes due to the fact that the 12v was dead so I charged it up to 13v

    When I tried to start the car on the 2nd push of the start button I hear only 1 click vs 2 clicks

    I assumed there is a bad relay in the hybrid so I took one out of my other prius which works fine. Switched the hybrid battery and the same thing. 1 click and it won't go into Ready mode

    Checked all fuses in engine compartment and all are good (AM2 fuse specifically was double checked)

    The car comes on. Windows work. Lights all come on. 1 push of the start button turns on the MFD. 2nd push od the start button lights up all the warning lights on the dash but will not go into Ready

    Confirmed 12v at the fusebox as well

    Since the battery was replaced there are no error codes to list

    Any ideas to try would be appreciated
     
  2. Tombukt2

    Tombukt2 Senior Member

    Joined:
    Nov 29, 2020
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    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    Ybrid isolation fault comes to mind with scanner connected try clearing codes back to back as per scanner screen do it ready now? That's hybrid iso fault usually. Now take service plug out remove cap showing fuse reinstall SVC plug leaking out last slam step dvom on silver screw on fuse in plug other probe to chassis ground meter should count down to Zero . If not say it stops at 75 bad battery is not isolated from frame of car . Which is your 12 volt ground point which now having havoc wreaked on it .
     
  3. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    brake pedal switch?
     
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