Why can't my vci cable read the ecu's in Techstream?

Discussion in 'Gen 2 Prius Main Forum' started by milleniaman, Dec 16, 2019.

  1. milleniaman

    milleniaman Junior Member

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    My 05 Prius has sat up since installing a rebuilt traction battery 3 years ago. The installer couldn't get it to start. There had been some problems with the keys previously.
    I now have techstream but it cannot read any ecu with either cable.
    The console shows flashing car light whether the key is used remotely or in the slot.
    Is there anything I could try at this stage?The car has to be moved tomorrow so the obvious choice would be the dealer
    Thank you
    t
     
  2. ChapmanF

    ChapmanF Senior Member

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    Techstream usually won't connect unless the car is ON (two power button pushes, foot off brake). If the car doesn't recognize the key you're using and won't turn on, that's an obstacle. :)

    There is supposedly a way to make Techstream connect with the car off, I think by some diddling of the dome-light switch on the door frame, it's in the documentation somewhere. (Otherwise, how else would a dealer use their security-enabled Techstream license to teach the car a new key?)

    I remember reading about the procedure sometime and trying it, but never getting it to work, myself.
     
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  3. bisco

    bisco cookie crumbler

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    can you please clarify?

    a battery was installed 3 years ago and wouldn't start, and it has been sitting ever since?
     
  4. PriusCamper

    PriusCamper Senior Member

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    Well this thread is off to an interesting start...
     
  5. dolj

    dolj Senior Member

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    Just a WAG, have you installed new fully charged batteries in the fobs?
     
  6. milleniaman

    milleniaman Junior Member

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    The dealer has it. The techs can't diagnose it without 2 operating batteries. The traction battery is corroded. It's value to me with a good battery is $2500. It has always been excellent performer but the mileage is over 300k.
    I'm not sure there is any future for the car other than junkyard. What do you think?
    C.P. from Arkansas who installed the battery has offered me $500.
    Thanks for the help so far.

    here is a link
    Prius for parts - auto parts - by owner - vehicle automotive sale
     
    #6 milleniaman, Dec 18, 2019
    Last edited: Dec 18, 2019
  7. PriusCamper

    PriusCamper Senior Member

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    Dealers are stealers... They're warranty specialists, not old car repair repair people... You're wasting your time taking your car to them.

    Also all old Prius batteries are corroded, that's normal.

    Did the dealer give you error codes and sub-codes or were they too clueless to even do that?

    Next step is to pull the battery pack and do a diagnosis. If you lived near me I'd put in a loaner pack to confirm that's the only problem, then you could enjoy your car while your pack is being repaired and I'd charge in the $500 range.. A hybrid mechanic who has lots of overhead in paying bills for a shop would be in the $1000 range.

    But what happened to the installer 3 years ago? Did they discount the price? Did they keep your old battery? Sounds like the ripped you off and installed a broken battery pack?
     
  8. milleniaman

    milleniaman Junior Member

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    Hi Prius Camper
    A little bit of interesting background... I loved my prius but after 5 years the bottom of my feet burned after 20 minutes in the car. I'm sensitive to emf. When CP put in the battery he could not figure out the key problem and as he lived 200 miles away it was on me to do something. I didn't.
    Now he's going to pick it up and if he can get it going, charge me for his expenses. A friend would like to have it. It may ride again someday.
    Thanks for the info.
     
  9. PriusCamper

    PriusCamper Senior Member

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    Oh good... That's a wise approach... As for EMF, keep in mind every cell in your body generates EMF and your heart cells generate the strongest EMF. The more you can exercise and bring lots of energy and growth to your body, the more your body will be able fend off other EMF fields. I've found that the people who are most vulnerable to EMF are the ones who aren't activating their own EMF fields intensely enough. For example it used to take me all morning and early afternoon to feel awake. These days, first thing every morning I run to the end of the street and back and just that easy 1/3 of a mile is way stronger than coffee. It's changed my life!
     
  10. milleniaman

    milleniaman Junior Member

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    Haha You should join the alternative health FB forums I am on regarding mitochondria and cell voltage. I agree with you. I'm just haven't been very able with heart problems and musculoskeletal issues
     
  11. milleniaman

    milleniaman Junior Member

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    I regret that I didnt get to camp in the prius. What a bargain that would have been running a/c all night and cheap on gas.
    The dealer should have been able to diagnose a key problem without installing a battery right?
     
  12. PriusCamper

    PriusCamper Senior Member

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    Probably not... I suspect they didn't do anything more than realize 12v was dead and then moved on to a long line of brand new cars with warranty that need attention.
     
  13. JayRock_PHX

    JayRock_PHX Member

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    Techstream does and will connect with the car off and without a key. Depends on your obd dongle u got. Most of the cheap vci knock offs suck and won’t connect properly. I use a really obd dongle as well as a vci I bought a long time back. I know all this because I make key fobs all the time.
     
  14. PriusCamper

    PriusCamper Senior Member

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    Any suggestion on what you would buy if you had to buy a mini-VCI again? What to look for? I don't buy on Amazon, but maybe if you could find some options on ebay? That'd be a big help for myself and others!
     
  15. JayRock_PHX

    JayRock_PHX Member

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    If you want you can buy the vxdiag unit which goes for around $70 which is better actually. Don’t fall for the WiFi/Bluetooth version because I have yet to see one work. But the unit does work pretty well with techstream. I’ll take a look at my vci dongle if there is a version. But the amazon version I bought was the image I attached if that helps but the ebay link for that order is too old.
     

    Attached Files:

  16. PriusCamper

    PriusCamper Senior Member

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    Hmm... Image you attached above looks identical to the $25 Mini-VCI that your were recommending against? I'm confused?

    But in searching for "vxdiag techstream" on Ebay I found this in the $60-$70 range... Is this the one you're referring to?
    Screenshot from 2019-12-19 12-10-16.png
    Are you saying this is the one that's going to provide the most reliability&usefulness, or nothing more than additional door lock functionality? Also, is software installation challenge on old Windows machine with no internet access still the same hassle, or is it easier?

    Thanks for taking the time to help us figure this out!
     
  17. JayRock_PHX

    JayRock_PHX Member

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    Yea I think so in my opinion. I use one. I also have a mvci for like $15 both work. But I prefer to use the vxdiag. Don’t get the bs WiFi or Bluetooth. Stick to the wired.
     
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