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Autostop Disable - SOLVED

Discussion in '3rd Gen Tundras (2022+)' started by Tundra246, Oct 11, 2022.

  1. Oct 11, 2022 at 5:15 PM
    #1
    Tundra246

    Tundra246 [OP] New Member

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    Tom
    I removed the switch from the panel and did some research with a VOM on what the switch is doing when pressed. There are 4 wires going to it. The outer 2 wires provide power to light the switch. The inner two wires are connected to the NO switch. One of the pins is always ground, The other pin will show voltage possibly 12V+ until the button is pushed and the ground wire grounds out that very small 12V signal wire (Thus telling the ECU it's being pressed). I messaged with IOcanetech and sounds like the Gen4 Highlander is setup the same.

    So I got the module for the 2020+ Gen4 Highlander from IOcanetech. You can find their products for sale on Ebay.
    http://iocanetech.com/

    It's not an exact fit, but iocanetech will be working on a Tundra specific module based on this info. You can wait for that, or if you don't want to wait, you can buy the Highlander module and make these modifications:
    1) The plug wasn't exactly the same. I needed to cut off the 'wings' on the top of the plug in order for it to go into the Tundra switch. See attached photos (First 2...before and after cutting).
    2) The fuseblock is on the far side of the passenger glovebox. The power wire needs to be 12-18" longer.
    3) It is REALLY tight fishing the power wire to the other side. I used a fish tape (coat hanger would work) to pull wire through without the fuse connector. I'm not sure the fuse connector could be fished through there. I fished the wire only and extended the power wire while doing.

    Short vid of it in action:
    https://youtu.be/HCXmVDDbMBI

    Also watch the video on the iocanetech site on the Highlander install, if interested in the details.

    Enjoy.
    Tundra3.jpg Tundra4.jpg Tundra5.jpg Tundra6.jpg Tundra7.jpg
     
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    #1
  2. Oct 11, 2022 at 11:19 PM
    #2
    xc_tc

    xc_tc New Member

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    Seems like a lot of work for a nonissue
     
    22PlatWCP, I8NJ, Medic343 and 2 others like this.
  3. Oct 12, 2022 at 1:00 AM
    #3
    KroppDuster

    KroppDuster Out with the old and in with the...older?

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    Here. There. Everywhere.
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    I love/respect/applaud the ingenuity here to figure this out. I know a lot of folks have been jonsing for this.

    I guess I’m one of those folks that finds this implementation of the auto start/stop to be one of the least intrusive versions. Mine rarely triggers because of the brake pedal control. To be honest, it’s so rare that when it happens it kind of surprises me because I forget the truck even has auto start/stop. Haha.

    That being said, I’m sure others aren’t as soft on the brake pedal as I am and probably get annoyed with this (or really any) implementation of the auto start/stop.

    Kudos to you for figuring this out. :bowdown:
     
  4. Oct 12, 2022 at 3:31 AM
    #4
    X42069

    X42069 New Member

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    I think there are some legitimate concerns regarding engine longevity with start stop functionality. Not specific to the Tundra but to all start stop engines. You are shutting off your oil/coolant circulation everytime you stop and then taking off before oil has had time to reach the top end of your engine.

    I understand they are engineered for this and maybe I'm not trusting enough....but engines were built to run not stop and start over and over and over and over
     
    Craigt914 likes this.
  5. Oct 12, 2022 at 4:00 AM
    #5
    Jjclamdips

    Jjclamdips New Member

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    Can’t it be disabled by pushing the button?
     
    Medic343 and 14burrito like this.
  6. Oct 12, 2022 at 4:01 AM
    #6
    X42069

    X42069 New Member

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    Yes but annoying to have to do each time you start your truck
     
    Donas likes this.
  7. Oct 12, 2022 at 4:57 AM
    #7
    99ways2die

    99ways2die New Member

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    So,
    The off chance that I press the brake pedal hard enough and not on purpose to have the truck shut off (happened once to me in 10K+ miles)....vs the ever-lasting yellow "A" light on the dash for the rest of my life?

    I, for one, will not implement this.
    Whoever "needs" this feature, more power to you and I'm glad it's solved with an easy solution...but, call me when this can be done w/o warning light on the dash.

    -99
     
  8. Oct 12, 2022 at 5:35 AM
    #8
    X42069

    X42069 New Member

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    Maybe I misunderstand as I don't have my truck yet. But do you need to push the button each time or does it "remember" that you have it turned off?
     
  9. Oct 12, 2022 at 5:44 AM
    #9
    blanchard7684

    blanchard7684 New Member

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    yep the start/ stop system is a lot of hassle for a non issue.
     
    X42069 likes this.
  10. Oct 12, 2022 at 6:27 AM
    #10
    Seawolf

    Seawolf New Member

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    You have to press it each time you start the truck. It didn't take long to develop the habit of pushing the start button on the right side of the steering column and then immediately press a button on the left side to turn the auto stop/start off. I wish it would remember...or better yet, i wish there was the ability to change the default behavior of all these types of things in the infotainment system. There is literally no reason why they couldn't have included this as one of the many settings you can already adjust using that system.

    As a side note, but related, Chevy does this same thing with the auto-revmatch feature in the Camaros for the manual transmissions. I love that feature in my car for the perfect downshifts, but it defaults to "off" every time I start the car and I have to press a button to turn it on. Why that default setting can't be adjusted in its infortainment system is beyond me. Again, it's a habit I was able to develop and I rarely think about it anymore. It's just muscle memory at this point: press start button...press revmatch button.
     
  11. Oct 12, 2022 at 6:34 AM
    #11
    Boats N TRDs

    Boats N TRDs New Member

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    I have the hybrid. For those of you concerned about longevity due to start/stop, you should know that the hybrid engines in these trucks (and going to be in every Sequoia) turn off the gas engine a lot. Much more than just stopping at a light. It turns off when I coast down hills, the entire time I creep through a drive through, sometimes even at 50mph on a level stretch. They turn off and on a lot. Way more than just at stop lights. I think these engines had to be built to handle this or Toyota is going to be in a pickle once every hybrid Sequoia rolls off the line.

    That said, I absolutely hate start/stop in a non-hybrid setup. My wife's 2017 Cadillac is the worst! It doesn't care about how much brake pressure you've applied, if it gets down to 0.5mph, it's going to turn off and bring you to an abrupt stop. When you let off the brake to go, there is quite a delay before power hits the wheels. And there is no button to turn it off!

    Funny thing is I absolutely do not care when my hybrid Tundra turns the gas engine off. I have motion, instant power, etc. whether the gas engine is running or not. It drives like an always-on engine no matter if the gas engine is running or not. But I absolutely get wanting to bypass the acceleration lag caused by start/stop in the non-hybrid engines. Nice work!
     
    X42069 likes this.
  12. Oct 19, 2022 at 5:33 AM
    #12
    Craigt914

    Craigt914 New Member

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    This feature might be engineered to work in the different types of drive trains out there, and Toyota seems to have put some additional work into making our Tundras easier to deal with the auto off, but it still doesn't mean that added wear and tear on key drive line components doesn't happen. The most durable drive trains are the ones where the engineers kept things as simple as possible. I don't think saving an ounce of fuel at a light is worth the long term cost of the added wear and tear that the auto off function brings. I'm planning on keeping my truck for quite a while, I'd like the miles I put on it to be as least traumatic as possible.

    Thanks Tom for your awesome photos and write up! You answered all the questions I had, and that kit install looks pretty simple.
     
    Last edited: Oct 19, 2022
    X42069 likes this.

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