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Scangauge 2 broke my OBDII and is causing problems

Discussion in '1st Gen. Tacomas (1995-2004)' started by betterbuckleup, Sep 1, 2018.

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  1. Sep 1, 2018 at 9:26 PM
    #21
    tony2018

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    tony2018 Well-Known Member

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    Not a bad idea..
     
    tony2018, Sep 1, 2018
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  2. Sep 1, 2018 at 9:26 PM
    #22
    tony2018

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    tony2018 Well-Known Member

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    Op, time to look for the wiring diagram to the obd2 port back to the ecu.
     
    tony2018, Sep 1, 2018
    #22
  3. Sep 1, 2018 at 10:12 PM
    #23
    License2Ill

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    License2Ill Woke like a Coma Toyota Tacoma

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    It's a dry heat thou, AZ
    Vehicle:
    2004 SC'd 5VZ DC 5spd 4x4 TRD.GOV
    Bailing wire & Duct tape
    I disagree about the 24/7 part of your theory. It is terminal fretting. But probably due to poor quality of the pins on scanguage's part, combined with a misalignment of one or both pins. I've seen this symptom at least two dozen times.
    My SC has been plugged in 24/7 for 64 months.
     
    License2Ill, Sep 1, 2018
    #23
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  4. Sep 1, 2018 at 10:41 PM
    #24
    License2Ill

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    License2Ill Woke like a Coma Toyota Tacoma

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    It's a dry heat thou, AZ
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    Bailing wire & Duct tape
    OBD2-Connector-Pinout.jpg
     
    License2Ill, Sep 1, 2018
    #24
  5. Sep 2, 2018 at 12:29 AM
    #25
    betterbuckleup

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    betterbuckleup [OP] Well-Known Member

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    Yea you are most definitely correct there. My tachometer is from a v6 when I have the 2.7L 4 banger in my truck, so the rmp's are not accurate. I was using the scangauge to serve as a tach.
    I guess its time to get a real mechanical tach to mount to my cluster
    Yea thats what I have been working trying to get a hold of to help trace back if I do need to.

    If you reference one of my original pictures of the back of the port, you can see there are only four wires in my situation

    Also the video is now live on youtube!
     
    betterbuckleup, Sep 2, 2018
    #25
  6. Sep 2, 2018 at 12:39 AM
    #26
    betterbuckleup

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    betterbuckleup [OP] Well-Known Member

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    I actually thought of that for a bit, but the problem is as the connector got jostled the slightest bit, the engine would just cut off. This started happening to me more frequently too. I actually today got stranded in the middle of campus, less than a minute away from my house, and just stood there jostling shit around in my engine bay trying to get it to start back up. :frusty:
     
    betterbuckleup, Sep 2, 2018
    #26
  7. Sep 2, 2018 at 4:33 AM
    #27
    taco57

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    taco57 Well-Known Member

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    Never heard of this and I’ll bet the scangauge people would argue. I have had mine for many years without issue.
    Just my 2cents worth.
     
    taco57, Sep 2, 2018
    #27
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  8. Sep 2, 2018 at 6:12 AM
    #28
    Kerby J

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    Kerby J Well-Known Member

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    You don't need to get a mechanical tach to fix your RPMs. Get a digital odometer from a 4 cyl truck (both the 2.4 and 2.7 will work) and swap in for your current V6 odometer unit and your RPMs will read correct.
     
    Kerby J, Sep 2, 2018
    #28
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  9. Sep 2, 2018 at 12:40 PM
    #29
    License2Ill

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    It's a dry heat thou, AZ
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    Bailing wire & Duct tape
    Yeah, but look at your burnt pins. They're grounds.
     
    License2Ill, Sep 2, 2018
    #29
  10. Sep 2, 2018 at 12:58 PM
    #30
    loginfailed

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    loginfailed Well-Known Member

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    I would start disconnecting those pins from the connector.
     
    loginfailed, Sep 2, 2018
    #30
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  11. Sep 2, 2018 at 2:16 PM
    #31
    Luv my yota

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    Luv my yota Well-Known Member

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    I like the idea of a scangauge but really, doesn’t hold water against a true diagnostics reader, and I’m w/the majority saying it shouldn’t be plugged in 24/7. If you’re wondering the health of the engine buy a good diagnostic tool to read when you feel issues arise. That said, the scangauge doesn’t look harmed I don’t see how it could have done that, looks like the diagnosis port was probably boogered up before you used the scangauge and plugging it in made it worse or had a unknown short developing.
     
    Luv my yota, Sep 2, 2018
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  12. Sep 2, 2018 at 2:21 PM
    #32
    1997tacomav6

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    Once those pins and plastic connectors melt its time for a new plug male and female
     
    1997tacomav6, Sep 2, 2018
    #32
  13. Sep 2, 2018 at 4:30 PM
    #33
    betterbuckleup

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    betterbuckleup [OP] Well-Known Member

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    For me, one is ground and the other has 10v power in accessory key position.
     
    betterbuckleup, Sep 2, 2018
    #33
  14. Sep 2, 2018 at 4:31 PM
    #34
    tony2018

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    tony2018 Well-Known Member

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    oh snap, is it shorting to ground?
     
    tony2018, Sep 2, 2018
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  15. Sep 2, 2018 at 4:34 PM
    #35
    betterbuckleup

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    betterbuckleup [OP] Well-Known Member

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    My best guess is what 12TRDTacoma suggested.
     
    betterbuckleup, Sep 2, 2018
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  16. Sep 2, 2018 at 5:57 PM
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    loginfailed

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    loginfailed, Sep 2, 2018
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  17. Sep 2, 2018 at 6:00 PM
    #37
    betterbuckleup

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    betterbuckleup [OP] Well-Known Member

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    betterbuckleup, Sep 2, 2018
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  18. Sep 2, 2018 at 6:22 PM
    #38
    loginfailed

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    loginfailed Well-Known Member

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    Thats what I have in my truck.

    I have something hooked up 24/7. Despite a number of naysayers above, I see no problem with it. 25 years experience in the auto industry and I've never known keeping things plugged into an OBD2 port to cause any problems. If it was a fire hazard or would cause damage to your vehicle, you wouldn't see auto insurance companies urging people via discounts to use their telematics devices.
     
    loginfailed, Sep 2, 2018
    #38
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  19. Sep 2, 2018 at 7:48 PM
    #39
    License2Ill

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    License2Ill Woke like a Coma Toyota Tacoma

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    It's a dry heat thou, AZ
    Vehicle:
    2004 SC'd 5VZ DC 5spd 4x4 TRD.GOV
    Bailing wire & Duct tape
    Welp. Then that's your problem. You have a hot shorted ground on one of those pins. Because they're ground pins.
    I'd wage a bet it's started as a shorted part of the SG2 harness, because it's RJ-11. Probably one of the twisted pairs got smashed...
    But on the other hand, with as much damage the connector has, it could of originally started as a bad connection, caused heavy resistance enough to cause that amount of heat and eventually shorted to a live power source. In DC, power flows from the negative to the positive.

    The male SC2 OBD connector doesn't latch or lock to the OBD Port. It sees a lot of vibration. And it's directly above your throttle leg. So it doesn't have a lot going for it.

    I just zipped tied my connectors together and used Ox-gard on the pins. Definitely don't want to deal with this issue.

    Good luck getting this fixed & squared away bud!
     
    Last edited: Sep 2, 2018
    License2Ill, Sep 2, 2018
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  20. Sep 3, 2018 at 9:41 AM
    #40
    tony2018

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    tony2018 Well-Known Member

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    I don't see any problems leaving something in the obd2 port. I've done that with my bluetooth elm227. I sometimes forget to even remove it.
     
    tony2018, Sep 3, 2018
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