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3rd Gen Traction Control Modes Explained

Discussion in '3rd Gen. Tacomas (2016+)' started by Doggman, Jan 25, 2018.

  1. Jul 7, 2019 at 1:03 PM
    #301
    PB FAB

    PB FAB Well-Known Member

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    Base model SR - no A-TRAC.
     
  2. Jul 7, 2019 at 3:21 PM
    #302
    splitbolt

    splitbolt Well-Known Member

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    Right...because it requires the hydraulic brake booster...or does it?
    My thought is, it just requires 4-channel ABS. A-TRAC would just be more effective with it's[hydraulic] increased braking power.

    Not to rely too heavily on the FSM, but it does indicate 'A-TRAC control active' as one indicator of the slip indicator light blinking; for vacuum boosted 4wd.

    What about FJs and 4Rs with A-TRAC; all hydraulic boost?

    I wish we could pick Nishimura's brain...
     
  3. Jul 7, 2019 at 4:58 PM
    #303
    BigWhiteTRD

    BigWhiteTRD Official thread killer (only crickets remain)

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    The results observed by @PB FAB matches what we had previously found precisely and is represented in the spreadsheets. In fact I believe the PB FAB actually contributed to the data we have. On the SR, in 4Lo the default behavior (no button presses) is:
    TRAC ON, VSC OFF
    (you wont see any lights for the TRAC ON on the dash, until the system decides to react).
    You get the VSC OFF to indicate that stability control is off. Stability Control is separate from the Traction Control

    When TRAC operates you get the squiggly.
    The VSC OFF light is 'squiggly' with an 'OFF'

    PB FAB 4Lo.jpg

    Note, TRAC operates with the standard vacuum brake booster.
     
    Last edited: Jul 8, 2019
  4. Jul 7, 2019 at 5:21 PM
    #304
    BigWhiteTRD

    BigWhiteTRD Official thread killer (only crickets remain)

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    There are (2) options for the SR/SR5/Sport/Limited in 4Lo.
    TRAC ON, VSC OFF (Default)
    TRAC OFF, VSC OFF (Long Press VSC Button)

    Here are the Dash indications you get for the two modes.
    Notice, when the TRAC OFF light is On, then there is NO traction control.
    4Lo Dash Lights.jpg
     
    Doggman [OP], ERod27 and PB FAB like this.
  5. Jul 7, 2019 at 9:43 PM
    #305
    David K

    David K Well-Known Member

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    Correct, only the hydraulic brake booster can fully stop the spin to match rotation with the traction tire on each axle.
     

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