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Well .. battery pack went again ... no suprise though ...

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by chronon, Apr 2, 2021.

  1. chronon

    chronon Active Member

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    spent about the whole day charging a couple modules in the pack to balance them out with the rest to reduce the delta ..

    one thing i'm noticing is that things seem ok with engine charging .. if u have a high load on with engine off .. the weak block will drag down harder than the rest of the pack .. like if you are running a/c and engine is off the delta which may have been .1 or .2v .. suddenly goes to .5 and higher in it's weakness .. so for folks stringing a dying pack along .. it would be good to not run heavy loads like the a/c without the engine running !
     
  2. chronon

    chronon Active Member

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    well .. had gotten the car 3 miles away closely watching the blocks .. small delta ave .. then as a couple miles went on i saw that block 9 was diving ... gradually the delta was 1.7.... but no red triangle ... almost at the point of turning into the grocery store parking lot .. red trianngle comes then turbo HV fan .. i did take the car home .. acouple stops to try and figure anything out ..
    once the triangle is there even if the pack returns to normal the code must be cleared or 12v power removed to make it go away ..
    i have another ECU coming ..and am looking for oanother sense harness ... trying to get used modules of the same year for matching is difficult ... a series of let downs just almost as soon as u thought u had it going .. to top it off .. the insurance girl told me the car was in 'temp status' for a reduced rate .. when i called to 'put it back on the road' the night girl stated it was never put in the off-the road status ..
     
  3. dolj

    dolj Senior Member

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    It doesn't really need to be the exact same year, somewhere in the ballpark may help. What you do need is capacity matched to your other good modules, which those modules in the blocks giving you problems do not have.

    I doubt you need a new ECU, and unless you spring for the $50 or $60 for a new Frame Wire No 2 harness the secondhand one from a junkyard or eBay/Amazon won't necessarily be any better than your current one. At this point It's debatable you need a new harness at all, but it certainly wouldn't hurt to replace it with a NEW, not secondhand, one.
     
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  4. chronon

    chronon Active Member

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    yes capacity matching .. fix one then the next goes off ... been heree before and like a --- returning to it's ---- .. here i am again ..
    ecu already coming ... did see some slight char in a couple pins that extended all the way down to the pcb .. so to eliminate that
    possibility is a good start .. and that harness should be ohmed out so i can verify pin connectivity which i will likely do when the ECU is replaced ..
     
  5. chronon

    chronon Active Member

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    i'm not sure where this might be answered but what about charge cycling an individual module directly in the pack ...?
    how does that affect adjacent modules if at all ... ? is the ECU affected ? thx
     
  6. chronon

    chronon Active Member

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    I am replacing the 12v battery .. i tried lithium iron and it comes with screw connectors and retrofitting works until u hit a big bump and the connection is loosened .. going back to tried and true .. that little bitch of a battery compartemnt with the fan duct directly over the positive terminals makes mtc. a pain .. have a new AGM 35Ah coming to try eliminate computer flakiness.
     
  7. chronon

    chronon Active Member

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    made an informational on continutity checking the vsense cable ....
     
  8. mr_guy_mann

    mr_guy_mann Senior Member

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    I hope that the paper clip wasn't any thicker than the pins on the ecu. If it's exactly the same size, then great. But if it is thicker, then it can distort the female terminals in the connector, causing poor contact. BTDT myself.
     
  9. chronon

    chronon Active Member

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    .. oh yeah nothing like an old rusty paper clip for illustration and measurement testing .. the pins on the connector are gold plated and flat .. but wider than the round paper clip - got an AGM battery in .. ECU replacement soon to be installed -

    The Vsense cable just wreaks of cheapness .. the connoctors are so thin .. the ECU connector is nice but the ends connecting to the battery terminals is just as minimal as it needs to be .. those things twist /flex when they get the torque spec ... the wire itself feels something like 22 guage maybe thinner.. just seems like they skimped in these 2 areas .. the bus bars are solid copper weighing 3.3 grams ... they are fairly beefy.

    BTW: some salvage internet place offered something around $400? and if time for other sellers were provided stated could go up to $1800 at most .. I did the vin on Carvana .. : their offer was $200 .. they didnt ask about new tires , nickel busbars SS nuts, new AGM battery .. come on man !
     
  10. chronon

    chronon Active Member

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    so replaced the module in block 9 that was flaking out .. and after alot of resets (discon 12v bat) and it seemed to stabilize out so that i was able to drive I'm guessing 25 miles .. i was careful not to use the ac though it was 82 ... i got another blue tooth fm transmitter and the obd blue tooth quit being recognized by the android app that i was using to monitor car status .. i tried it with the wifi obd transmitter and that app didnt find it .. it wants blue tooth .. so that kind of stinks until i can figure it out -- but seem to be back in business for the time being ..
     
  11. chronon

    chronon Active Member

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    .. would be nice to have the same shape as the ECU pins (flat and about 1mm wide, with prob <.5 mm thickness .. ) that is not a normal shape to common objects(like a small paper clip) -- maybe in an electronics parts/scrap bin those are hanging out somewhere ..
     
  12. chronon

    chronon Active Member

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    so got about a days worth out of the module replacment at block 9 .. of course things seemed stable yest .. saw about a .3 v delta and all seemed well except that i wasnt able to keep the connection with the hybrid assistant app so was running blind last night and this morning .. went to take car out around noon and got less than a mile away and noticed ugly red triangle and car exclamation point on the MFD (mutha freakin-front display) .. will try the techstream to pull the excitement of learning the new block issue ...
     
  13. 2k1Toaster

    2k1Toaster Brand New Prius Batteries

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    You must value your time at absolutely nothing. This thread physically hurts to read.
     
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  14. edthefox5

    edthefox5 Senior Member

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  15. chronon

    chronon Active Member

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    what the he** do u want me to do put in a video with t&a glamorizing blocks and modules ?
    yeah if it hurts u to read it think how much it hurts to write it !
     
  16. 2k1Toaster

    2k1Toaster Brand New Prius Batteries

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    You writing about your terrible repair decisions is not the source of the issue. Making terrible repair decisions is the issue.
     
  17. chronon

    chronon Active Member

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    am i supposed to fork over $1600 on another battery pack / kit so that would then be the 'right' repair decision ?
    and not to get political or anything but have you ever tried reading any part of the obomacare bill .. now that right there will give u a headache in shortorder --- it's based on romneycare ...
     
  18. chronon

    chronon Active Member

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    I attempted techstream with no connection .. it would not connect with several different attempts and sequences ..
    then used a CAN code reader .. it saw no codes .. magically ? red triangle was gone and a used the car in the afternoon for about an hour or less .. this car is a roller coaster ..
     
  19. chronon

    chronon Active Member

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    well i got about a day of driving .. i would say maybe 30 miles ? .. stop -go mixed with 50 mph ... and mr. red triangle and ! on the MFD appeared .. though the fan did not go into hyperdrive .. i have yet to check the code from that .. -- have a newer bluetooth coming .. (an elm321 micro and a better vgate ) .. hopefully 1/both of those will maintain a good solid connection as the Kona brand petered out and is not recommended on the Hybrid Assistant site) -- when your HV battery is in a weakened and susceptable state of that delta overstepping, u really need to be monitoring so you aren't far from home as it gets bad - driving blind and you get these surprises like I got yesterday....
     
  20. SFO

    SFO Senior Member

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    Have you ever been able to get this mini-vci cable and techstream work before?
    The codes (DTCs) are still there, just stored as 'historical', a proper reader will tell you what they are.
    Did you grid charge or balance the HV battery assembly after this last module swap?