Battery Control ECU needs replacing

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by ProspectivePriusPeruser, Jan 19, 2020.

  1. ProspectivePriusPeruser

    ProspectivePriusPeruser Junior Member

    Joined:
    Jun 3, 2019
    50
    9
    1
    Location:
    Australia
    Vehicle:
    2008 Prius
    Model:
    N/A
    I was going to have Toyota do this but the time it will take to have the part shipped in is ridiculous (6 weeks). How hard is it to DIY this? I have access to a 2nd gen parts car, could I just rip the ECU from there and chuck it in mine, or is it not that easy? Cheers
     
    #1 ProspectivePriusPeruser, Jan 19, 2020
  2. Elektroingenieur

    Elektroingenieur Senior Member

    Joined:
    Jan 8, 2017
    2,515
    3,273
    9
    Location:
    California
    Vehicle:
    2016 Prius
    Model:
    Three Touring
    See my posting from earlier this month about battery ECU replacement. A battery ECU salvaged from a newer (but still second-generation, 2004–2009) car should work in an older one, but I don’t know about the reverse.
     
    #2 Elektroingenieur, Jan 19, 2020
  3. ProspectivePriusPeruser

    ProspectivePriusPeruser Junior Member

    Joined:
    Jun 3, 2019
    50
    9
    1
    Location:
    Australia
    Vehicle:
    2008 Prius
    Model:
    N/A
    Ah heck, the one I can pull parts from is a 2007 or 8 and mine is a 2009. Thanks anyway, this will be a looooong 6 weeks.
     
    #3 ProspectivePriusPeruser, Jan 20, 2020
  4. Elektroingenieur

    Elektroingenieur Senior Member

    Joined:
    Jan 8, 2017
    2,515
    3,273
    9
    Location:
    California
    Vehicle:
    2016 Prius
    Model:
    Three Touring
    It might be worth checking the part number: 89890-47092 is the latest version, used in new production from April 2007, and it should work in all second-generation Prius cars.
     
    #4 Elektroingenieur, Jan 20, 2020
  5. SFO

    SFO Senior Member

    Joined:
    Feb 7, 2017
    5,302
    4,243
    0
    Location:
    Northern California
    Vehicle:
    2007 Prius
    Model:
    N/A
    Were you successfully able to scan the OBD2 port for DTCs?

    Which stored code(s) came back, and how do you know it needs another battery control ECU?
     
    #5 SFO, Jan 20, 2020
    Raytheeagle likes this.
(You must log in or sign up to post here.)