08 No Ready Mode after battery disconnects

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by imojo, May 12, 2025 at 11:57 PM.

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  1. imojo

    imojo New Member

    Joined:
    Feb 24, 2025
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    Location:
    Missouri
    Vehicle:
    2008 Prius
    Model:
    Touring
    Hello! Need help troubleshooting a Gen 2 Prius that wont Ready Mode

    Took out the service plug Unbolted negative grounding wire from frame

    Tried to remove bolts to HV cage, one is stuck, will need new tool, put it back together.

    Reinserted safety plug. Have subsequently checked this several times.

    Bolted grounding wire. Slight spark, nothing weird.

    Press POWER with brake depressed

    Car will only show HV battery display (motsly charged, all blue bars), A/C runs, gas gauge shows one, brake lights work, all in all — seems to be connected to 12v (?), but won’t actually fire/ready mode. Normal (?) clicks from HV when trying to start.

    What should I start checking? Thanks!
     
    #1 imojo, May 12, 2025 at 11:57 PM
  2. Brian1954

    Brian1954 Senior Member

    Joined:
    Jan 31, 2021
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    Location:
    South Central PA, USA
    Vehicle:
    2011 Prius
    Model:
    III
    Double check the orange hybrid battery safety interlock. Some people miss doing the last step. View attachment 267811

    Also, use a meter to measure the voltage of the 12v battery.
     
    #2 Brian1954, May 13, 2025 at 10:14 AM
    Last edited: May 13, 2025 at 10:19 AM
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