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09+ Electronic Traction Systems Explained

Discussion in '2nd Gen. Tacomas' started by trd09, Aug 22, 2009.

  1. Aug 22, 2009 at 11:32 AM
    #1
    trd09

    trd09 [OP] Well-Known Member

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    With all the confusion on how the many different traction systems alphabet soup work, I did some research and figured I'd throw this together.


    Trac- Cuts power and brakes spinning wheel(s). “Traction Control”

    VSC- Controls spins by braking select wheels. “Stability Control”

    AutoLSD- Brakes spinning wheels to emulate LSD- does not cut power. Avail only in 2WD mode.

    ATRAC- Avail only on OR models. Similar ALSD operation except available in 4WD mode.




    When you start an 09 Tacoma:


    Trac- On
    VSC- On
    AutoLSD- Off


    When wheels spin, cuts power and brakes spinning wheel. If slide is detected, “beep beep beep” and slide is corrected.




    Quick push of button:


    Trac- limited op (see below)
    VSC- On
    AutoLSD- On


    When wheel spins, brakes spinning wheel but does not cut power (ALSD function). If slide is detected, “beep beep beep” etc. Will only brake select wheels to control spin when spin is detected.




    Hold down button while stopped:


    Trac- Off
    VSC- Off
    AutoLSD- Off


    When wheel spins, it will keep spinning. No slide corrections under 30 mph. ie, used for donuts, etc. VSC is always enabled over 30 mph.




    ATRAC- Only on OR models. Provides “AutoLSD” in 4WD mode (braking spinning wheels but not cutting power).


    In 4WD mode (ex OR), only disable feature is VSC by holding button down (no ALSD), but again activates over 30mph.
     
  2. Aug 22, 2009 at 11:37 AM
    #2
    ttylerr

    ttylerr Well-Known Member

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  3. Dec 4, 2009 at 11:36 AM
    #3
    ruppmeister

    ruppmeister Well-Known Member

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    Thanks for putting this together TRD09. This was something that was confusing me until you made all the connections between each system.

    Great post!
     
  4. Dec 4, 2009 at 12:29 PM
    #4
    HondaGM

    HondaGM Roll Tide

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    good job danielson.
     
  5. Dec 9, 2009 at 3:08 PM
    #5
    yahtzee

    yahtzee Member

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    Great info! Now I can spin donuts again.
     
  6. Dec 9, 2009 at 5:37 PM
    #6
    KPT

    KPT sees what you did there.

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    Thanks I have been wondering what the hell the difference between all those was.
     
  7. Dec 9, 2009 at 6:27 PM
    #7
    GTVAPSAMTIK

    GTVAPSAMTIK Well-Known Member

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    My 2010 TRD OF have soo many buttons it got me confused. thanks for clearing up little. *** STICKY PLEASE ANYONE ***
     
  8. Dec 9, 2009 at 6:35 PM
    #8
    hendooman

    hendooman The Stroker Ace

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    Good post, I was trying to slide in the snow today, and the bells are ringing like crazy. All I wanted to do was slide a little!
     
  9. Dec 9, 2009 at 6:52 PM
    #9
    NAYo2002

    NAYo2002 Well-Known Member

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    I posted the following in another thread, but I figure it'd be useful for people to know what to do when you get stuck in snow/mud as well.

     
  10. Dec 11, 2009 at 8:50 AM
    #10
    Crom

    Crom Time is precious; use it wisely

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    Nayo2002, thanks for posting that. I especially enjoyed that VSC video. BOSCH created VSC and wow, to know that data from the National Highway Traffic Safety Administration and the Insurance Institute for highway safety show that VSC systems are second only to safety belts in reducing fatalities on our nations roads.

    That's awesome.
     
  11. Dec 11, 2009 at 11:09 AM
    #11
    Juicifer

    Juicifer Member

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    This helps explain things. However, shouldn't I hear the Trac come on when I'm driving through a snowy neighborhood road in 2wd and apply to much gas? It seems like my truck just spins and spins. It would be nice if it would assist me at the occasional rainy or snowy stoplights and let me leave it in 2wd since the majority of the roads aren't slick.
     
  12. Dec 11, 2009 at 11:19 AM
    #12
    hendooman

    hendooman The Stroker Ace

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    Yeah for sure you should, I cant spin the tires without the bells going off and the trac coming on, maybe you have something set wrong. I am also not sure of your model and trim packages...there is a difference.

    And welcome to TW!
     
  13. Dec 11, 2009 at 11:28 AM
    #13
    Juicifer

    Juicifer Member

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    I hear and see beeping, but I don't feel anything except spin. I do sometimes get the VSC to kick on if I'm going around a turn, but in a straightline I get nothing. 2009 TRD Off Road, auto. Is it obvious when the Trac engages?
     
  14. Dec 11, 2009 at 11:33 AM
    #14
    Outlaw

    Outlaw Well-Known Member

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    Hold the VSC button(car with squiggly lines) button for 5 seconds, because just pushing the button turns the VSC off, but if you hold down it down for several seconds, it turns the LSD off too and you can fish tail all you want. in 2 hi or 4 hi. Have fun!
     
  15. Dec 11, 2009 at 11:33 AM
    #15
    hendooman

    hendooman The Stroker Ace

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    same truck I got by the way. It is working, you can really feel it around a turn, it will almost stop you from sliding...because it will lock that spinning wheel or brake it one of the two...it is all so confusing. I am starting to figure it out though. My previous truck was a big gmc 4x4, it just slid till I steared out of it or it hit something :woot:
     
  16. Dec 11, 2009 at 2:39 PM
    #16
    copernicus

    copernicus Well-Known Member

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    I just turned off VSC via holding the button down for 5 secs. It does not turn back on above 30 mph.

    (2010 2.7L manual 5 speed)

    TRAC/VSC only turn back on from the quick press of the button, which also activates the Auto LSD function, that combination reactivates the VSC/TRAC and disabled the Auto LSD once it reaches a certaing speed (30 mph I guess).
     
  17. Dec 11, 2009 at 3:54 PM
    #17
    NAYo2002

    NAYo2002 Well-Known Member

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    This is true. Only thing that turns itself back on is TRAC (also turns off A-LSD) according to the manual. If you press and hold for 5 seconds, nothing will come back on regardless of speed.
     
  18. Dec 11, 2009 at 4:26 PM
    #18
    Isthatahemi

    Isthatahemi Well-Known Member

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    TRAC doesn't cut power in 4WD HIGH. Only transfers torque.
     
  19. Dec 11, 2009 at 7:36 PM
    #19
    ETAV8R

    ETAV8R 4th MAW

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    Great info, always appreciate having the tacomas rubiks cube cleared up
     
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