1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Cell blocks read -25 and 0 on 3,4,5

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Devintcrouch, Aug 12, 2020.

  1. Devintcrouch

    Devintcrouch New Member

    Joined:
    Aug 12, 2020
    1
    0
    0
    Location:
    Oklahoma
    Vehicle:
    2007 Prius
    Model:
    ----USA----
    I’ve bought 16 new modules and replaced as many as I can all volts are good but still have the triangle of death. I’ve bought a scanner and it shows Block 1 at -25 and blocks 3,4,5 reading 0 volts. I’m reading them right to left. I swapped the cells around to narrow it down and I’m still getting same voltage on same blocks. Is it the harness or ECU?
     
    #1 Devintcrouch, Aug 12, 2020
  2. dolj

    dolj Senior Member

    Joined:
    May 14, 2012
    7,855
    3,968
    0
    Location:
    Wellington, New Zealand
    Vehicle:
    2007 Prius
    Model:
    N/A
    High probability it is the harness and not the ECU. But check the pins of the orange plug in the ECU, to be sure.

    If it is the harness, buy a new WIRE, FRAME, NO.2 (PNC 82165C) Part Number 82165-47040 from your local or online Toyota parts dept. It will be the best $70 you spent.
     
    #2 dolj, Aug 13, 2020
    SFO and fotomoto like this.
  3. Jmack111

    Jmack111 Member

    Joined:
    Nov 3, 2009
    371
    78
    0
    Location:
    Tacoma wa
    Vehicle:
    2004 Prius
    Model:
    N/A
    #3 Jmack111, Aug 14, 2020
  4. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    24,915
    16,216
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    Block voltages coming out negative are usually telltale signs of damage to that harness or to the pins of the connector where it plugs into the ECU.
     
    #4 ChapmanF, Aug 14, 2020
(You must log in or sign up to post here.)