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Trying to Diagnose Check Hybrid System Failure Gen 3 Prius

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by jowapah, Dec 18, 2017.

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  1. bisco

    bisco cookie crumbler

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    is there gas?
     
    #21 bisco, Dec 18, 2017
  2. ericbecky

    ericbecky Hybrid Battery Hero

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    Is there gas in the car?
    What is SOC of hybrid battery?
    What is voltage of hybrid battery?

    Other ideas...
    Clean MAF
    Clean throttle body
    Wipe excess oil from top of intake.

    Try starting by spraying some starter fluid down the intake. Can you keep it running with that as fuel?
    Confirm fuel pump is working.
    Confirm fuel pressure is 42psi.
     
    #22 ericbecky, Dec 18, 2017
  3. TMR-JWAP

    TMR-JWAP Senior Member

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    Three items required:

    Air (and air flow measurement)
    Fuel (pump running, building pressure and injectors firing at correct time)
    Ignition (strong spark at correct time, what controls spark timing? cam position sensor? crank position sensor? If the ECU doesn't know where the piston is in the engine cycle, it can't know when to initiate the spark.

    Wasn't there a recent poster that actually had a mouse nest in his throttle body that blocked air flow? Just an example of strange things that can happen.
     
    #23 TMR-JWAP, Dec 18, 2017
  4. ericbecky

    ericbecky Hybrid Battery Hero

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    I had one where a cap from the coil packs was on top of the throttle body. Car was towed to my shop because the other shop did not want to work on a hybrid. ???
     
    #24 ericbecky, Dec 18, 2017
  5. Travis Decker

    Travis Decker Active Member

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    My last gen3 no start was a hair puller. Ran on starting fluid but otherwise would not run. In the process of testing spilled gas on the shop floor. Go back 30 min later gas still on floor. Wait.... Gas evaporates. Tank FULL of WATER! Wth! Put fuel line into cans command pump on, put in new gas bingo.....

    I've also had a no code crank sensor give me a run around. Once every two months you're backing out of the driveway and the car says to put in park not charging. FAE Italian crank sensor we finally found by really picking over the Freeze Frame data.
     
    #25 Travis Decker, Dec 18, 2017
  6. jowapah

    jowapah Junior Member

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    I'm newby to techstream, so not sure what you mean by freeze frame of the code. If theres addtl info attached to the P0A0F code, not sure how to access it as of now.
     
    #26 jowapah, Dec 19, 2017
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  7. Raytheeagle

    Raytheeagle Senior Member

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    Next to the code there will be a “snowflake” icon. If you click on that it will provide more details ;).
     
    #27 Raytheeagle, Dec 19, 2017
  8. jowapah

    jowapah Junior Member

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    #28 jowapah, Dec 19, 2017
  9. jowapah

    jowapah Junior Member

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    I apologize for my random postings. I'm new to Priuschat also. In order to respond to a particular post, do I select reply within that post, and my response will be attached to that somehow..? I think that is right, although I've been posting just at the end so far... Sorry for messing things up... And again, thanks for all the feedback you've all been providing.....
     
    #29 jowapah, Dec 19, 2017
  10. ericbecky

    ericbecky Hybrid Battery Hero

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    No worries. Glad you are here and contributing to the community.

    We were all new to the forum(s) at some point.
     
    #30 ericbecky, Dec 19, 2017
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  11. jowapah

    jowapah Junior Member

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    Well, if I wasn't overwhelmed before, I sure am now. Just puled reports for Hybrid Control and Engine / ECU .... Too much for me to digest right off.... I have to go to work now, and not sure what exactly to Freeze Frame capture at this point. I got some data, and then tried to record start sequence, but as you can guess, I don't know how to get the right info....

    What are acceptable file types for upload. I have Symphony, extension is .odt, guess I would need to translate to a pdf ..?

    Thanks again everyone
     
    #31 jowapah, Dec 19, 2017
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  12. Raytheeagle

    Raytheeagle Senior Member

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    If you take a picture of the screen with your phone and post it, that is the easiest way;).

    Keep us posted (y).
     
    #32 Raytheeagle, Dec 19, 2017
  13. Mendel Leisk

    Mendel Leisk Senior Member

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    You've got that correct. Also, if you want to quote just a portion, you highlight/select that text, and there should be a pop-up with the option reply, will quote just that portion. This much easier on a computer than a phone: if on a phone maybe just quote the whole thing, and/or quote whole thing and then delete some.
     
    #33 Mendel Leisk, Dec 19, 2017
  14. Mendel Leisk

    Mendel Leisk Senior Member

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    Posting pics from your phone, you choose "upload a file", and the pop up is buggy, you need to touch on the TOP line of text "upload a file...", not the button below. Once you've uploaded you can choose to just attach, or embed, using "full image" option. The latter is nicer I think, and it embeds at current cursor location, like this:

    upload_2017-12-19_8-4-6.png
     
    #34 Mendel Leisk, Dec 19, 2017
  15. jowapah

    jowapah Junior Member

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    I ran a first attempt of Techstream, not sure about recording attempt to start but captured static data this morning. Clicked the 'snowflake' and captured all the Hybrid Control Data. I need to attempt to record a start attempt and post that data. Back to the symptom description, when the MG* tries to start the ICE, does it try to start it like a traditional starter would start a gas engine? Reason I ask, Had my son attempt start, and watched to see if crank or flywheel spun as if being started, and no movement at all. so the MG* does not budge the ICE at all. I've been mentioning that throughout, maybe not explaining it correctly.
     

    Attached Files:

    #35 jowapah, Dec 19, 2017
  16. jowapah

    jowapah Junior Member

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    Posted a video of the sound it makes when attempting to start on Youtube.
     
    #36 jowapah, Dec 19, 2017
  17. Travis Decker

    Travis Decker Active Member

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    No engine RPM and no MAP, the pistons are not moving. Requested RPM....

    ICE Siezed IMHO but what do I know!

    If you hit the PRINT button on the lower left on techstream and save as PDF it makes a pretty page with all the PIDS
     

    Attached Files:

    #37 Travis Decker, Dec 19, 2017
  18. jowapah

    jowapah Junior Member

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    I posted a snapshot of Techstream data that shows Hybrid battery cell statuses... They are certainly lower than when I measured them over a week ago. It is cold here in the Northeast, so with no charging happening, I understand that they would become discharged... I read elsewhere that if your Hybrid battery gets discharged, it can only be recharged by dealer. Is that true? Can you charge individual pairs with a t12V trickle charger?
     
    #38 jowapah, Dec 19, 2017
  19. jowapah

    jowapah Junior Member

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    I've rotated the ICE off the lower pulley, spins normally
     
    #39 jowapah, Dec 19, 2017
  20. bisco

    bisco cookie crumbler

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    you can charge with a grid charger.
     
    #40 bisco, Dec 19, 2017
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