1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Trailer Sway Control

Discussion in 'Towing' started by Gypsy Russ, Jan 29, 2014.

  1. Jan 29, 2014 at 10:12 AM
    #1
    Gypsy Russ

    Gypsy Russ [OP] Member

    Joined:
    Apr 2, 2013
    Member:
    #101200
    Messages:
    6
    Gender:
    Male
    Packwood, WA
    Vehicle:
    Bone stock 06 4X4
    None
    I'm considering trading in my '06 for a new Tacoma with towing package. The package comes with "trailer sway control", which, according to Toyota's brochures, is an electronic system that actuates trailer brakes for sway control (footnote 25 in disclosure section of brochure). Anybody know how such a system works? How does a sensor on the truck know how to apply trailer brakes to reduce sway? Does it apply both brakes or just one side? Seems like the mechanical systems that use friction would work easier. Or, I could just use the lever on my brake controller that applies trailer brakes without using the truck brake pedal, right?
     
  2. Jan 30, 2014 at 2:29 PM
    #2
    monkeyface

    monkeyface Douchebag, or just douche if we're friends

    Joined:
    May 13, 2012
    Member:
    #78740
    Messages:
    1,840
    Gender:
    Male
    Colorado
    Vehicle:
    '90 2WD, '98 4WD, '12 4WD, '05 Tundra 4.7, '07 4Runner 4.7
    That's a good question, my answer is I don't know. Just a guess, maybe the truck senses the rear end of the truck swaying and sends some signals through the 7-pin to the trailer brakes? I've been in some stiff crosswinds and I have no idea if or what the truck does to compensate. I figure the trailer sway control would only engage if you engage the brakes?

    All I know is the trailer I have, with a straight hitch does well in crosswinds. I HAD the Equalizer WDH with 4-way sway control, and tore it up going mildly offroad. That hitch was bent, the hookup on the trailer side was sliding no matter how much I tried to torque it down. Even the giant bolts on the truck side came loose, had to get them impact-wrenched again at Camping World.

    I finally said enough of this, I'm not gonna pull that hitch every time I go off a paved road. Went to the straight hitch for $36, put some Timbren bumpstops on the rear, and so far so good. There's better options for the rear end for towing, more expensive and fool around with the stock geometry, but all in all the truck does well with just the straight hitch.
     
  3. Feb 8, 2014 at 5:45 PM
    #3
    52motorhead

    52motorhead Well-Known Member

    Joined:
    Dec 27, 2011
    Member:
    #69434
    Messages:
    72
    Gender:
    Male
    I do believe it only works the truck brakes .
     
  4. Feb 12, 2014 at 11:34 PM
    #4
    LuckyCharms

    LuckyCharms Knows a little about a lot

    Joined:
    Apr 4, 2013
    Member:
    #101360
    Messages:
    182
    Gender:
    Male
    First Name:
    Ryan
    Socal
    Vehicle:
    '13 PreRunner TRD dclb
    As I understand it:

    It applies the trailer brakes by themselves. Most (if not all) trailer brakes cannot be applied one side at a time and an 7 pin connector does not provide that option. Once it detects sway caused by the trailer, it will apply the trailer brakes. By applying the trailer brakes, it creates a huge load on the truck causing the entire train to straighten out. (think of pushing a wet string into a straw versus pulling a wet string through a straw.) How it detects sway of the trailer, I don't know. Again, I could be wrong, but that is how I understand it.
     
  5. Feb 13, 2014 at 7:38 AM
    #5
    Gypsy Russ

    Gypsy Russ [OP] Member

    Joined:
    Apr 2, 2013
    Member:
    #101200
    Messages:
    6
    Gender:
    Male
    Packwood, WA
    Vehicle:
    Bone stock 06 4X4
    None
    I think I have the answer and Lucky Charm, is, I believe, correct. Somehow (don't know how) the system senses when a trailer is attached and, under bad sway, it applies both trailer brakes. At least that's what the dealership said when I asked the question.
     
  6. Oct 1, 2015 at 3:31 PM
    #6
    scocar

    scocar Scouting the perimeter for weakness

    Joined:
    Nov 11, 2009
    Member:
    #25814
    Messages:
    29,389
    Gender:
    Male
    First Name:
    Dick
    In close proximity to an undisclosed location
    Vehicle:
    2015 DCLB 4x4 SR5
    Back to square one after the 2001. So...
    Made me curious, I still have not even had time to go through the manual, not mess with VSC. Anyway, this is what it says:

    ■ Trailer Sway Control (vehicles with towing hitch and 7 pin connector)
    Helps the driver to control trailer sway by selectively applying brake pressure for individual wheels and reducing engine torque when trailer sway is detected.
    Trailer Sway Control is part of the VSC system and will not operate if VSC is turned off or experiences a malfunction.


    Interdasting. Still, how it detects sway is unclear. If it operates in unision with VSC, it must rely on those sensors, but how the hell would it pick up lateral wiggle?

    And yeah, If I have a trailer big/heavy engouth to sway, I'd want to just use traditional trailer brakes to straighten it out.
     
  7. Jan 2, 2016 at 8:33 PM
    #7
    SuperKevin11

    SuperKevin11 Member

    Joined:
    Dec 2, 2014
    Member:
    #143479
    Messages:
    23
    Gender:
    Male
    First Name:
    Kevin
    Chattanooga, TN
    Vehicle:
    2015 Tacoma 4x4 TRD Sport
    I put my ass in the driver's seat. Best mod. yet.
    Okay. I know that this is an old thread but I experienced either the sway control or the VSC system activation today while I was towing a trailer loaded with about 3,000 lbs. of gravel. The trailer was a little back loaded and walking some on the way home when I reached around 55 mph. While coming down a while, I coasted to about 55 mph and it began walking on me. I down shifted and applied the brakes to slow down. The truck took over everything and began applying the brakes itself in an anti-lock fashion. The traction control light on the dash came on. It took the sway out of the trailer. I assumed that it was the sway control system since I was not in a skid with my truck. However, there are no trailer brakes on this little trailer. Maybe my truck thought I was in a skid?
     
To Top