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Techstream Not Acknowledging (Autofill) Car

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by TwoPriusInTenn, Dec 25, 2023.

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  1. Tombukt2

    Tombukt2 Senior Member

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    Yes I've used that before for my original cable that came with the Toyota computer mine checks out I think I'll have to run that utility again but it works on all my cars except this 1 2010 so. I'm guessing my cable's good and something's wrong with that car and that's okay for now.
     
    #21 Tombukt2, Dec 26, 2023
  2. ChapmanF

    ChapmanF Senior Member

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    So pin 16, the +B pin, is one of the ones shown as no good?

    What do you measure on that pin to chassis ground?
     
    #22 ChapmanF, Dec 26, 2023
  3. TwoPriusInTenn

    TwoPriusInTenn Member

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    After perusing Tech stream I found a cool feature under "Help" to check the cord and port. It appears that pins 6,7,14, and 16 are no good. I checked with two different cords. Both gave the same results.
     
    #23 TwoPriusInTenn, Dec 26, 2023
  4. ChapmanF

    ChapmanF Senior Member

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    If my eyes don't deceive me, you've just replied to my question replying to your cable test, by reposting your cable test post I was replying to.
     
    #24 ChapmanF, Dec 26, 2023
  5. TwoPriusInTenn

    TwoPriusInTenn Member

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    I see what I did. I miss typed, twice. This is what came up when I ran a test on the port and the cable. Ports 6,7, 14, & 15. #16 checked out ok. Looks like a fairly easy fix.
     
    #25 TwoPriusInTenn, Dec 26, 2023
  6. TwoPriusInTenn

    TwoPriusInTenn Member

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    2004 Prius
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    FIXED! We did replace the engine ECM during our troubleshooting of this problem. We discovered the OBDii port was defective. I went to a local auto recycler and pulled two ports from a couple Prius'. (I grabbed one for a spare). Spliced the new ODBii port in and was able to read the codes. Turns out the Engine ECM needed to be replaced. Happy all is well and problem solved!!!
     
    #26 TwoPriusInTenn, Dec 27, 2023
    Last edited: Dec 27, 2023
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