OBD II- Scanner

Discussion in 'Gen 2 Prius Accessories & Modifications' started by capcadet05, Jan 17, 2015.

  1. capcadet05

    capcadet05 New Member

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    Hi I have read several posts about which scanners to purchase but am still puzzled. I don't want to pay the $125 diagnostic fee at the dealer but I am worried if I can see all the codes the car has. The red triangle with exclamation light flashed at me last week and then flashed at me a few days later during normal car operation at 15 mph. This is concerning and I would like to see what DTC is associated with this. Will a normal obdii CAN scanner find that code or do I need the proprietary tech to read that sort of incident? Any recommendations?
     
  2. john1701a

    john1701a Prius Guru

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    Any scanner should do the trick.

    I've used my ScanGauge to read Prius codes. It worked fine. I could clear them too.
     
  3. koolingit

    koolingit Member

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    Check your oil level right now. A low oil level will make the red triangle flash.
     
  4. capcadet05

    capcadet05 New Member

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    Thanks, I checked the oil level and it was ok. I also had the oil level replaced so I will see if it appears again. It was odd because it only flashed momentarily and then disappeared. I assume that a scan gauge would tell me what sensor triggered this. Is that correct? The dealer said it might not unless it happened several times to record in the OBD. Also, is it just buying a standard obd scanner to get these codes or is there a specialized one for seeing what code triggered the light?
     
  5. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Mini VCI is the best available tool as this will give you essentially the same diagnostic power as the Toyota dealer tech enjoys, for a low two-digit price.
     
  6. nh7o

    nh7o Off grid since 1980

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    This has not been the tale told by many posters, using brandX scanners. Generic units are not to be trusted.
     
  7. john1701a

    john1701a Prius Guru

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    Just code reading doesn't work?

    It makes sense that some can't do anything else helpful.
     
  8. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Since the Prius contains multiple ECUs including many which a regular car does not have, a generic OBD-II code reader will generally fail when the time comes to read codes produced by such ECUs. For example, skid control ECU, traction battery ECU, body ECU, immobilizer ECU.

    A generic reader will usually read engine ECU DTC and sometimes hybrid vehicle ECU DTC. Don't expect much more than that.
     
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  9. Britprius

    Britprius Senior Member

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    I fully concur with Patrick on this one. The best and cheapest option is the Mini VCI.

    John (Britprius)
     
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  10. depriusoto

    depriusoto Member

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    Updated my AutoEnginuity reader to the latest version. DO NOT USE this program on your GENII! It caused all kinds of havoc and left me dealing with ABS and brake system problems. As I had installed this update on a different computer, I was able to go back to the previous version of the program on another computer and with it was able to clear all the specious codes that the update generated. I'm still working on dealing with the ABS problem that didn't clear.
     
  11. depriusoto

    depriusoto Member

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    January 31, 2015 --- what is the latest version of the Mini VIc that folks are using with techstream? What suppliers have you had success dealing with? What is the latest update version for the Chinese pirated Techstream ? Best place to get it?
    Thanks,
    Ed
     
  12. Britprius

    Britprius Senior Member

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    Do not worry about the latest updates they are available on line. The updates mostly add new vehicles as the VCI works on all Toyota, Lexus, and Scion cars with obd2 from about 1994 on.

    John (Britprius)
     
    #12 Britprius, Jan 30, 2015
    Last edited: Jan 30, 2015
  13. grhybrid

    grhybrid Junior Member

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    Unfortunately anything other than a Techstream is a crapshoot at best. Generic tinkertoy 'scanners/ code readers' don't access most of the modules, usually just the powertrain module and then limited data. The only reliable way to look into your Prius's electronics are with a factory Techstream. Of course all the modules are available, as well as many bidirectional functions, personal preference settings, etc. More and more independents garages are becoming equipped with factory level scanners. A few phone calls and you should be able to find one. I certainly hope any service facility you are frequenting would be properly tooled up to correctly service your Prius.
     
  14. MTL_hihy

    MTL_hihy Active Member

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    Not sure if the above poster has ever tried a mini VCI setup but basically all you need is the cable and the latest software can be downloaded online.

    Cable:


    Software: Dropbox - Techstream

    First install the cable driver, then the techstream software, then connect to the vehicle.
     
  15. Cadenza

    Cadenza Member

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    What's a better OS for Mini VCI Techstream - Windows XP (32 bit) or Windows 7 (64 bit)?
     
  16. Britprius

    Britprius Senior Member

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    Windows XP 32 bit is easier to set up, but once running both systems work the same.

    John (Britprius)
     
  17. Cadenza

    Cadenza Member

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    Would you happen to have the set-up instructions for Windows 7 ? My XP laptop is almost a decade old and I suspect it would crap out anytime now.

    Thanks...
     
  18. Britprius

    Britprius Senior Member

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    Leave it with me for a few minutes, and I'll get back with the details. Unless someone beats me to it.

    John (Britprius)
     
  19. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Windows 7, 32 bit OS would be the best choice.
     
  20. Britprius

    Britprius Senior Member

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    Ok hear goes. Load the drivers, then load Techstream, but do not open it. Go to my computer and double click on the hard drive. Scroll down to "program files (x86)" double click (from now I will call DC).
    Scroll down to Toyota diagnostics (DC)
    Scroll down to Techstream (DC)
    Scroll down to ENV (DC)
    Scroll down to IT3system (DC)
    Scroll down to Avialable function setting and change TISFunction=1 to =0 then go to file at the top of that box and choose "save".

    Job done.

    John (Britprius)
     
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