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3rd Gen Traction Control Modes Explained

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

  1. Mar 26, 2018 at 11:17 AM
    #201
    tonered

    tonered Well-Known Member

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    Are you sure the right front wasn't spinning? Like you said, the transfer is fully locking. Something had to be slipping up front if the rear left was spinning.

    Could there be a problem with your front diff / ADD? Was the front driveshaft spinning?
     
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  2. Mar 26, 2018 at 11:32 AM
    #202
    PatricNV

    PatricNV Well-Known Member

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    I was by myself so could not get out. But did confirm there were no marks indicating the front had spun. I did go find some sand and could make the front spin and with MTS would spin holes for all four tires. I need to go back out with someone to video and see if I can replicate.
     
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  3. Mar 26, 2018 at 11:39 AM
    #203
    tonered

    tonered Well-Known Member

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    The only other thing that I can think of is that your weight in the drivers seat lifted the wheel when you were in the truck. Getting out let the wheel touch down?

    Otherwise, I'm stumped.
     
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  4. Mar 26, 2018 at 11:52 AM
    #204
    PatricNV

    PatricNV Well-Known Member

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    That is an interesting observation. I would not have felt the front right spinning if it was in the air and it would not leave any marks on the ground. Rather than muck this tread up with more discussion - hold off and I will test this in the next couple days and report back.
     
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  5. Mar 26, 2018 at 1:15 PM
    #205
    David K

    David K Well-Known Member

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    MTS replaced the basic A-TRAC, by making it adjustable. I would NEVER use L4 without A-TRAC... it is just silly to let the tires spin instead of moving forward. The Rear Locker is NOT needed unless the other system fails (and I have yet to experience that) and is harder to use than MTS/A-TRAC which activate instantly and do not hamper steering.

    I recommend always have MTS on in L4, what setting I guess depends on what terrain you are in... as I have just A-TRAC and the Rear Locker available in L4, besides the nearly useless option of open differentials only (when compared to traction control or lockers).

    Your front and rear driveshafts are locked together at the transfer case. There is no third differential there as in an AWD car. If you steer sharply on dry ground in 4WD, there will be resistance as the front and rear driveshafts must rotate equally in 4WD and loose soil allows the tires to slip at different rates.
     
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  6. Mar 26, 2018 at 3:46 PM
    #206
    BigWhiteTRD

    BigWhiteTRD Well-Known Member

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    It is very unlikely that the add or transfer case not be locked when the computer thinks they are. Not impossible, but dang hard to trick it. The truck only checks the add and transfer on engine start and mode changes, so it's posssible to have it engaged and then come disengaged while driving. (But the only way i found to do that is apply a few flashlight batteries to the module, it won't come loose randomly).
    If there is ever doubt about the engagement, you can either power cycle the truck while leaving it in 4wd (which forces a recheck of the add and transfer sensors), or mode change completely to 2wd, and back to 4wd.

    If you do that and get no errrors, I will almost guarantee that you are in 4wd in both the add and transfer case (unless you did my 2 wheel low mod)
     
    Last edited: Mar 26, 2018
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  7. Mar 28, 2018 at 8:56 AM
    #207
    PatricNV

    PatricNV Well-Known Member

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    You had it right. I took someone with me and the right front was spinning and in the air when I was in the truck and touched down when I was out so it left no marks but looked like it was sitting on the ground. I tested the other modes and they all seem to be working. I assume it is normal for it to sound like a dryer full of marbles when the traction control stuff is working.
     
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  8. Mar 28, 2018 at 9:00 AM
    #208
    tonered

    tonered Well-Known Member

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    Awesome! At least you know everything is in good working order.

    Yeah, you get some odd sounds with the ABS pump doing its thing. But even with my Sport, it tackles stuff really well.

    We've had cars that had louder and quieter ABS systems. The Taco is in the middle somewhere.
     
  9. Mar 29, 2018 at 1:26 PM
    #209
    Topanga Taco

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  10. Mar 30, 2018 at 5:51 PM
    #210
    66Woled69SO

    66Woled69SO Member

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    Guys... great thread. I don't own a Tacoma but just reading about your different traction settings and use.

    I have a '12 GX 460 and last month added crawl and MTS with just a module replacement, a new console switch and zero point calibration for the crawl to go live. All 460's from '10+ at any trim level can be converted with both for less than $500. MTS can actually stand by itself without adding crawl if one wants. The MTS module for '10-'13 runs less than $150 from Japan and the '10-'18 console switch for crawl can run between $275-$350. The '14+ MTS module is around $190. Here is the kicker on crawl... one can probably do that one for $10-$20 in toggle switches. Wiring schematics show just different connections being used. I originally thought skid control ECUs mattered but in the end all 460's have necessary hardware for crawl and MTS to work. MTS is actually only available in Canadian GXs in North America. No 460's sold in US with MTS.

    https://www.clublexus.com/forums/gx-2nd-gen-2010-present/859762-dac-versus-crawl-control.html


    I wonder how hard to convert Tacoma? If ABS actuator... probably a non-starter but food for thought.

    Work is being done on the FJ and certain model 4Runners can be converted.

    FJ

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    Last edited: Mar 31, 2018
  11. Mar 30, 2018 at 6:38 PM
    #211
    David K

    David K Well-Known Member

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    Oh boy, now you have done it!!! LOL
     
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  12. Mar 30, 2018 at 8:00 PM
    #212
    BigWhiteTRD

    BigWhiteTRD Well-Known Member

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    So in a few minutes research, it looks like on '12 GX 460 it only comes with hydraulic brake master cylinder. (And the later FJ too I think)
    The Tacoma 3rd gen OR and Pro (which have MTS and Crawl Control or A-TRAC) come with hydraulic brake master cylinder, and all other trims pneumatic. The master cylinder also includes the skid control ECU. So for the Tacoma, a new hydraulic brake master cylinder (and the associated wiring) would PROBABLY be needed.
     
  13. Mar 30, 2018 at 8:19 PM
    #213
    66Woled69SO

    66Woled69SO Member

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    BigWhiteTRD: Good info... I wondered what the limitation was. I gleaned a lot of info from Russian Prado threads from a few years back.


    EDIT: The 460's do have "crawl only" as an option but it is on a special order fully loaded top tier model.
     
    Last edited: Mar 30, 2018
  14. Apr 23, 2018 at 1:10 PM
    #214
    toyotatacomaTRD

    toyotatacomaTRD Senior Member

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    Didn't quite know where to ask this question, so I'm putting it here. Yesterday while trying to fit into a tight spot I reversed, then put in gear a little faster than I normally would have since people were waiting, I think I was completely stopped but its possible I was barely rolling back. The traction control light lit up and the brakes were sounding like I locked them up on ice. It was a completely dry day and I was on asphalt. I assume it's normal? But dang it was loud and sounded terrible.
     
  15. Apr 23, 2018 at 1:40 PM
    #215
    David K

    David K Well-Known Member

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    Maybe you shifted into reverse so fast, the center-of-gravity sensor got dizzy?
    Normally, the limited slip (TRAC) and stability (VSC) controls don't go into action on slow, reversing, dry pavement!
     
  16. Apr 23, 2018 at 1:45 PM
    #216
    toyotatacomaTRD

    toyotatacomaTRD Senior Member

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    I had reversed, then put it into drive... So I was in drive. Maybe it did get a little confused. I thought my transmission was grinding, but fortunately noticed the traction control light lit up.
     
  17. Apr 23, 2018 at 1:56 PM
    #217
    David K

    David K Well-Known Member

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    Not typically normal, but just today, as I was turning left and accelerating (on a street, dry pavement) the traction control noise was heard. I did not see if the light came on, too. I hear the noise breifly on uneven pavement too, like when the one side of the truck goes to a lower pavement. Such as when they install a new pipe in a street and have not finished returning the street to the original condition.
     
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  18. Apr 23, 2018 at 2:57 PM
    #218
    BigWhiteTRD

    BigWhiteTRD Well-Known Member

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    Auto or manual?
    Almost definitely the hill hold.
    I can assure you that I can get this sometimes with auto when I am abusive.
    It will fire on the OR with that ridiculously stupid version of hill hold with a tiny rollback. As little as 2 inches seems detectable to the skid control ECU.

    Think you can call that 'normal' but "undesirable".
    Note, non PRO/OR With vacuum booster seems to have much more 'normal hill hold.
     
  19. Apr 23, 2018 at 3:02 PM
    #219
    toyotatacomaTRD

    toyotatacomaTRD Senior Member

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    It's an auto. That makes a little sense.
     
  20. Apr 24, 2018 at 2:39 PM
    #220
    Bicycleman

    Bicycleman Well-Known Member

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    I guess I drive the poor man's 4 WD Tacoma. I don't have the crawl control. I was looking at that when I was considering a Subaru Outback, but after driving Tacomas for years, I just had to have me another Tacoma, 2nd 4 wheel drive. Back in 1985, there was no such thing as all these traction controls other than limited slip differential and 4 wd, which everybody thought was all you needed. Apparently not, anymore.
     
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