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  1. #1
    New Member 23 Rep Points spymac's Avatar
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    My Homebrew 'EzESC' mod w/video

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    Hi everyone, I'd like to introduce a project I've been tinkering with for the past few weeks. First, a little back story. I love my ST, its loads of fun and I have found that it is really easy to enjoy it on a daily basis due to the punchy midrange and the unique suspension tuning. To unlock the most fun, the electronic stability control needs to be in 'Sport' or 'ESC Off'. This of coarse is accomplished via the 'ESC OFF' button on the dash that we are all familiar with. Living in California, we have good weather almost year round, so I turn on sport mode basically every time I get in the car. Sometimes, though, I'll find myself in a position to have a little fun while entering a freeway on ramp just to have the fun killed by ESC kicking in because I forgot to hit the little button... Lame ... so I started devising an inexpensive, easy way to disable ESC automatically when starting the vehicle.

    Enter the EzESC mod!

    By inserting an Arduino board inline between the ESC button and the factory wiring, I'm able to activate ESC automatically when the vehicle starts, and enable full ESC off using a single press of the ESC OFF button. Right now the project is proof of concept. I've successfully tested the ESC button connected to an input on the Arduino, and am currently using the built in LED to act as the output which would otherwise be connected to the car controlling the ESC button.

    Here is the demo video:


    https://youtu.be/DUtlantIb4k


    Otherwise, here is how things are wired

    Factory configuration:
    ABS Module <------ ESC OFF

    Mod:
    ABS Module <------ Arduino <------ ESC OFF

    One of my goals for the project is plug and play compatibility using factory wiring. I started by sourcing the OEM connector for the ESC button which can be found here:
    http://www.onlinecomponents.com/te-c...tml?p=44138877
    I could not, however, source the mating connector. I don't believe one was ever manufactured, since the male coupler in this case is the button itself. After going through my parts bin I found that the connector uses the same pin spacing and size as a standard motherboard header pin. Since those parts are cheap and available it makes things a whole lot easier!

    The ideal location for the Arduino is in the space above the cubby behind the dash, there is enough room to place a small circuit board. Instead of using the $25 Uno, I found a $10 mini board from sparkfun that will fit the bill:
    https://www.sparkfun.com/products/11113

    Now I just need to pull the console apart a little more to find a power source. Looking at factory wiring diagrams, I have a few options. Possible 12v from the cigarette lighter, or 5v from the USB connector. Since the mini board can be powered by either, the availability of connectors and ease of install will determine which source I use.

    I've got a few orders coming for various parts so I'll try and update in the next few weeks as parts arrive and I do more testing. In the meantime, let me know if you have any thoughts or questions.

  2. #2
    Administrator Staff Team 953 Rep Points BoostBumps's Avatar
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    Great work!!!
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  3. #3
    Member 49 Rep Points Woods247's Avatar
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    I hit the ESC button after the ignition button every time I start the car. This will be very convenient for drivers like us. Thanks for taking the time to help out! Subbed.

  4. #4
    Senior Member 866 Rep Points Sourskittle's Avatar
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    I'd imagine you can also program them to default esc off by default ? If so I'm in :)
    Florida = no snow. And when it rains, you def know it, lol


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  5. #5
    New Member 23 Rep Points spymac's Avatar
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    Quote Originally Posted by Woods247 View Post
    I hit the ESC button after the ignition button every time I start the car. This will be very convenient for drivers like us. Thanks for taking the time to help out! Subbed.
    Exactly! Of course the code and schematics will be shared for everyone that wants to make one. But if this does work our reliably I do plan on making a few to sell in order to recoup some of costs thrown into this.

  6. #6
    New Member 23 Rep Points spymac's Avatar
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    Quote Originally Posted by Sourskittle View Post
    I'd imagine you can also program them to default esc off by default ? If so I'm in :)
    Florida = no snow. And when it rains, you def know it, lol
    Definitely. I was thinking of having a switch on the board that will allow you to choose the default mode upon startup, either sport or ESC off. If I can find a small cheap two position switch that can be soldered easily I'll go that route, otherwise it will be a header with a dip switch. Either way it'll be in the final product for sure. I'm thinking about when I go to track days it would be nice to set it and forget it on ESC off. Hmm maybe even a small remote switch could be a possibility, maybe installed under the cubby? Would want it somewhere that wouldn't get in the way and be hit by things but still accessible enough that you could get to it without removing the dash to access.

  7. #7
    Senior Member 1306 Rep Points Hijinx's Avatar
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    Subbing.


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  8. #8
    Member 93 Rep Points Spaceman_Spiff's Avatar
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    Have you considered a raspberry pi zero (only $5) to cut down on costs?
    '16 FiST: White Platinum, Black wheels.

  9. #9
    New Member 13 Rep Points tacocat's Avatar
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    Subbed. Is it possible to something like this using forscan?
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  10. #10
    New Member 23 Rep Points spymac's Avatar
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    Quote Originally Posted by Spaceman_Spiff View Post
    Have you considered a raspberry pi zero (only $5) to cut down on costs?
    I considered it too but the pi platform is not well suited for this application. Plus you would still need an micro SD ($$) just to make it work. The sparkfun Arduino pro mini is perfect for this at only $10. No need to run a shutdown process, just power on/power off, almost instant boot up time, easy to program and keep running, no OS to get corrupted etc.


 
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