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Any way to activate ABS via wiring harness?

Discussion in '2nd Gen Tundras (2007-2013)' started by chris_01928, Oct 20, 2022.

  1. Oct 20, 2022 at 11:22 AM
    #1
    chris_01928

    chris_01928 [OP] New Member

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    Does anyone know if there is a way to activate the ABS motor/actuators manually via the wiring harness(es) ? I know and have done it via Techstream but wanted to see if there is a way to manually exercise the valves.

    I was looking at below image but it wasn't obvious to me what wires I would use...

     
  2. Oct 20, 2022 at 11:28 AM
    #2
    bensky

    bensky PlatinumPro

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    Nope. The Modulator must be activated by the software. It’s a fail safe. Imagine you shorted wires in the harness and ABS kicked on driving down the freeway.
    Also, if you’ve done it with Techstream, why not use that again?
     
  3. Oct 20, 2022 at 11:51 AM
    #3
    chris_01928

    chris_01928 [OP] New Member

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    Fair - I just would like to actuate the ABS for longer on some of the lines in case it is sticking. But not a big deal, wanted to at least ask.
     
  4. Oct 21, 2022 at 6:23 PM
    #4
    baraynavab

    baraynavab Toyo Junkie

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    I think actuacting the abs for more than the allocated time may not be good for the system. I think it'll heat the system up. Essentially it's the same system that is used in Atrac. Which disables itself after 2 min do to the same condition iirc.
     
  5. Oct 21, 2022 at 6:47 PM
    #5
    Jeff_5_7

    Jeff_5_7 New Member

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    2007 RCSB 2014+ TRD Pro Conversion 5.7 4x4
    Full 2014+ Conversion Regular Cab Short Bed 4X4 2019 TRD Pro Grill, 2014+ Front End Swap 2014+ Interior/Dash Swap with TRD Pro Leather Seats, 2014+ Bed Swap with TRD Pro Stamping SOS 2/4 Drop Kit
    The little I have played with the ABS ecu I know it’s all software based. Controlled by codes on the CAN messages to tell it what to do and when to do it.(The Techstream testing part)

    All of the wiring is for input/output sensors to let the ecu see what is going on better so the software inside can make decisions.

    Unfortunately altering and wiring will only change its ability to see things going on. Not be able to control any of the internal code. You will just create errors and troubles codes really.
     

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