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tried to fix hybrid battery, this is what happened

Discussion in 'Gen 2 Prius Technical Discussion' started by Cody26, Oct 22, 2018.

  1. Cody26

    Cody26 Junior Member

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    By the way where is it located ?

    I guess it is located as in this video
    Is it right?
     
  2. TMR-JWAP

    TMR-JWAP Senior Member

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    Just to throw this out there.....I didn't have time to read every post.

    Losing the 12v battery, or disconnecting it causes many things in the ecu to go to a default value. Sometimes, this default value no longer makes sense for where items (like throttle body or maf) may actually be due to normal wear and tear, age, crud buildup, etc. You would not be the first person to not have their prii start after a 12v swap.

    Clean the maf and throttle body at a minimum to get them back to semi-original condition so a default value is more likely to match actual condition.
     
  3. Cody26

    Cody26 Junior Member

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    I understand what you mean. However, that also does not make sense a lot to me because ECU is just a unit in the whole system.
     
  4. ChapmanF

    ChapmanF Senior Member

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    You could think of it this way: every part in that whole system has a particular role to play. What's the role of the ECU?

    -Chap
     
  5. Skibob

    Skibob Senior Member

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    That’s correct but it also adapts as a car is used. What TMR is saying is you might have parts that are so far out of spec from when they are new that the ECU does not know what to do. It’s practically free to clean those parts, what do you have to lose?
     
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  6. Cody26

    Cody26 Junior Member

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    Guys,

    How can I find a repair manual for trouble codes which will guide me step by step?
    I am looking for something like this one but for all trouble codes.
     

    Attached Files:

  7. Cody26

    Cody26 Junior Member

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    Hey all,

    I think it is MAF problem and I am going to clean it with break cleaner. The reason I think is it is MAF is as in the picture.

    In one youtube video, it says that MAF voltage should be between 10 to 13v as the battery. So, I guess the voltage I have is too low.

    What do you think?
     

    Attached Files:

    #27 Cody26, Oct 24, 2018
    Last edited: Oct 24, 2018
  8. TMR-JWAP

    TMR-JWAP Senior Member

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    If all you did was swap the 12v battery............I'll mention it again......


    You would not be the first person to not have their prii start after a 12v swap.

    Clean the maf and throttle body at a minimum to get them back to semi-original condition so a default value is more likely to match actual condition.

    And I might be hesitant to use brake cleaner for the MAF sensor. They do make MAF cleaner. Just like they make TB cleaner. And a toothbrush can help also for scrubbing deposits on the TB. I would spend the 7 dollars and get the right stuff. Why risk creating more problems.........
     
    #28 TMR-JWAP, Oct 24, 2018
    Last edited: Oct 24, 2018
    Raytheeagle and Cody26 like this.
  9. strawbrad

    strawbrad http://minnesotahybridbatteries.com

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    NO NO NO NO NO

    Use MAF cleaner or nothing.
     
  10. ChapmanF

    ChapmanF Senior Member

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    The example you showed is just 18 pages copied out of the Repair Manual.

    You can access the whole thing at techinfo.toyota.com. And not just the repair manual, but the New Car Features manual (which explains what everything is, why it's there, and how it works, so the Repair Manual makes sense), Quick Technical Guides on all sorts of subjects, Technical Service Bulletins for specific known problems, recalls, service campaigns, and if you want even more depth in anything, the Toyota technician training course materials.

    One sign-in makes it all available.

    -Chap
     
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  11. Cody26

    Cody26 Junior Member

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    That costs money, unfortunately. I am a student and don't have spare cash.
     
  12. PriusV17

    PriusV17 Active Member

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    I hope you find out what is the cause of this problem.

    A while back I took a pic of my MAF sensor. Hope this helps for comparison. MAF cleaners are available at just about any auto parts store.

    maf-sensor.jpg
     
  13. Cody26

    Cody26 Junior Member

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    Hopefully!
     
  14. Elektroingenieur

    Elektroingenieur Senior Member

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    Perhaps your local public library provides access to the ChiltonLibrary service, which has the text and illustrations from the Repair Manual, reproduced under license from Toyota, or to a similar database. If you already have a library card, many libraries even allow you to log on to these databases from home.
     
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  15. Cody26

    Cody26 Junior Member

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    Hey all,

    I cleaned the maf sensor and body throttle and I could start the car. SUCCESS!!!

    There are a couple of concerns here. How badly it affects the car if the modules are not balanced?

    I got around 30 mpg while I was driving 10miles per hour for 30 minutes. Is it too bad?

    I also uploaded some techstream results. Please let me know what do you think?
     

    Attached Files:

  16. Elektroingenieur

    Elektroingenieur Senior Member

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    In IMG_0761.JPG, for the Engine and ECT system, the Monitor Status is “Inc,” for incomplete, meaning that at least one readiness monitor in the Engine Control Module hasn’t recorded enough driving, after it was last cleared, to reach a judgment about whether there might be a malfunction. I’d suggest driving the car more, ideally according to the drive pattern given in the Repair Manual for each incomplete monitor, and then checking again for diagnostic trouble codes.
     
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  17. Moh-V

    Moh-V New Member

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    That is a really interesting thread, this probably out of the topic but I was wondering if there any small easy modification and not a complicated one I can use to get better use of the battery in general?

    2016 Prius V
     
  18. Skibob

    Skibob Senior Member

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    If you are asking for your Prius V you would be better served by asking in the Prius V forum. It’s quite a bit different than a gen 2 Prius.
     
  19. Cody26

    Cody26 Junior Member

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    Easy thing is to clean maf in your case. But your car is new relatively.