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P0A0D to no end…

Discussion in 'Gen 3 Prius Technical Discussion' started by Awells80, Jul 15, 2024.

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  1. ChapmanF

    ChapmanF Senior Member

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    Good, there our manuals agree. That's the step 16 test, where OK ► replace power management control ECU.

    Back in your post #13, you had only mentioned the NG result for step 7 (where NG ► do step 16).

    Now we're back on the same page.
     
    #21 ChapmanF, Aug 4, 2024 at 1:21 PM
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  2. Awells80

    Awells80 New Member

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    I see what you are saying about my post #13. Now that we are on the same page, I’m having a hard time understanding why the diagnostic process has left me dry. I have replaced the Power Management Control ECU and I am left with the same results, meaning there is something more involved that is not in agreement with the rest of the system.

    Today, I performed insulation resistance tests to ensure there was minimal leakage current in the system. All my results were exceptionally high, indicating excellent insulation with no electrical leakage at the hybrid battery.
     
    #22 Awells80, Aug 4, 2024 at 10:37 PM
  3. Awells80

    Awells80 New Member

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    I think maybe I’ll go do a load test on all of my modules the way they sit right now and see what I come up with. I do not know.
     
    #23 Awells80, Aug 4, 2024 at 10:59 PM
  4. ChapmanF

    ChapmanF Senior Member

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    If you still have P0A0D, it just means there is something trickier going on with the dead-simple series interlock circuit that we didn't catch on the first pass.

    With the replacement power management control ECU in there, what is the step 7 test result now? That's the one that was NG, with the reading much lower than 10–14V, before you replaced the ECU.
     
    #24 ChapmanF, Aug 5, 2024 at 8:17 AM
  5. vvillovv

    vvillovv Senior Member

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    I know there's already be a hundred or two posts in this thread if you only asked one question pre post.

    What are you using to cycle and load test your modules?

    Back at the very beginning of this thread after you put your pack back into the Lexus. The fan stayed on for the entire time the car was on. My first thought was the packs re assembly.

    Than you add that you serviced the EGR. OK. I guess I'll assume this is the first time for both those services>
     
    #25 vvillovv, Aug 5, 2024 at 12:08 PM
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