Rewire an AT traction button into MT? Use traction toggle as an accessory?
 

So I've done a quick google search of the site and couldn't find anything really for what I'm looking for besides this thread:

http://www.ft86club.com/forums/showthread.php?p=2506276

I'm redoing my trim to be a piano black gloss and need to buy the black traction control buttons (MT). I remembered that the AT's buttons have the "Snow / Sport" toggle and wondered if there's a way to rewire these for some other purpose?

Someone mentioned that the AT module has a different connector so you'd have to repin the harness in the MT? I'm looking to use this later on as either an accessory toggle for something, or maybe if I get ECUTek use it for map switching.

Really I just want to know what I'll need to do to A) install this properly in a MT and B) wire it up to be used for something later on.

Test it with a cheap LED strip. It is essentially a rocker switch so it would only send a signal while down, not a constant on/off style. I'm not sure on resistance lvls tho that's y I'd say test it with an LED strip. Cud prolly pick up a silver 1 cheap on eBay otherwise just useless buttons

Is a rocker switch similar to a momentary switch? On my Audi I had a "funk" button (one way, momentary radio button) that controlled my radar detector.

Damn nice idea! I'm going to install air cups over the winter, so it'd be awesome to have them go up and down using those buttons...

Thanks for the idea! I'll start digging into it and post my findings

^ Now that would be cool to see

I was thinking it would be cool to add buttons this way too. I bought a used AT set off someone, and was going to start looking at it soon. Just need to finish up my heated mirrors first.

my mistake. i meant momentary, not rocker

Hmmm if they're momentary that makes it more difficult.... Not sure what I'd use it for then. Though I'm still tempted to buy it for the extra $10 just to see if I want to use it for anything later.

It should be pretty easy to use a relay to lock out the signal when you push the button. After all, most TVs use a momentary switch to power on and off.


ETA: I dug around on this issue, and found a StackExchange question like yours. It gets a little hairy, but they list chips that would work for what you want, which is to push a momentary switch and have it toggle a constant signal (like TVs and laptops).
http://electronics.stackexchange.com...ntrol-a-toggle

Thanks for the link. I'll do some digging on the StackExchange forums and see what I can find. I'm thinking just a signal input to a relay should do the trick and eliminate the need for a digital processor. IE: press "snow" send signal to close relay for pin A, pressing again opens relay. Press "sport" closes relay for pin B, press again to open relay.

It would actually take more than one component to do this. You can lock the relay in an "ON" state with just a signal by running a cable between the "ON" output and the signal input. However, to turn it back off, you need a NAND gate to read if the relay is on, and the momentary switch is pressed. Also, you'll need an AND circuit to determine if you are allowed to turn the relay on (reading the NAND gate and momentary switch) This will allow the signal to be interrupted. You'll also need a monostable circuit right after the "snow" switch to prevent flip-flopping of the circuit.


All in all, it's probably a lot easier to just get the chip for around a nickel and play with some resistors to get it running. You might be able to sub in an Arduino or Raspberry Pi, and do it all in code. I can do more scratch pad diagrams later if you're still interested on building the electronics yourself.

I looked at the electrical wiring and checked the AT switch I bought. Here is the drawing of the connector.
Attachment 146046

Pin 2 has a LED flowing to Pin 3 for lighting
Pin 8 is ground, and All buttons tie low.
Pin 6 is Snow(AT only)
Pin 5 is VSC Off
Pin 4 is Sport(AT only)
Pin 1 is VSC Sport

It looks like it is a subaru connector, I'm going to try out 040-3 recepticals in it to see if they fit in the connector. Then any Tie Low button will work.

Now you're stretching my electrical knowledge. Quick explanation?

What exactly is a tie-low button? Does pressing the Snow/Sport button just change which pin gets a signal?

Basically, that's the pin output for the switch. I also took notes looking at a BRZ wiring diagram, and had noted pretty much the same:

1 - VSC Sport
2 - Anode (Positive end of the LED lights)
3 - Cathode (Negative end of the LED ligths)
4 - Sport (AT switch)
5 - VSC Off
6 - Snow (AT switch)
7 - non existent
8 - Ground

I checked my switch on the manual transmission, and it's missing pins 4, 6 and 7, so it's all making sense

I'm not sure what he means by tie-low (The normally ground or normally V?) but by measuring the type of output you get when you press Sport or Snow, you can easily determine if you need additional circuitry to obtain your goals.

I'll measure that in a friends AT soon =)

I found that AMP 316836-1 040-3 receptical fits in the connector fine. So with two of those, and a AT switch assembly, you get two new buttons.

Tie Low means the switch connects to Ground not power. So whatever you want to add will have to have a power source(power plug in center consule is probably the cosesst), the fancy thing to add, then go to the wire connector to the back of the buttons, and when the button is pushed it will connect the wire to ground.

Could you post a link to where we could find the pins you're talking about? :thanks:

And I figured that's what you meant by Tie Low, i studied electronics in another language, so it gets messy haha

Thanks for your help!

Whew okay things are making some more sense now! Sounds like I need to do some more research and studying before I start this project... And figure out what I'd want to use my two new buttons for as well. Lol

I'm curious to see what you both find when you do some testing.

Digikey and Mouser are the two main places to order electronic parts:
http://www.digikey.com/product-detai...8CT-ND/3488609
http://www.mouser.com/ProductDetail/...GIr9AXIlYwM%3d

At the very least if you can replace the MT buttons with the AT ones, with no rewiring, you will just have two buttons that are not connected to anything.

I feel like you would need a magic/more magic label for that.


http://catb.org/esr/jargon/html/magic-story.html

I like how you photoshopped out the scratches on the VSC button as well.


I feel like that is the perfect button set up for map switching.

Components in real life
 

Ok, so I'm not very familiar with what components are available in real life for reasonable prices and working on 12V...

Lets say I want to have the 2 signals from Snow and Sport trigger a simple On/Off switch. What component out there can do that?

Being that the signal doesn't stay on, i thought of something such as a double relay, which I designed here (if it's not patented I'm gonna regret posting this here :lol:)

Does this exist? What's the name for it?

Thanks!!
Attachment 146795

With the way it's pinned out, doesn't snow/sport already work as an on/off switch?

Sent from my A0001 using Tapatalk

Raising this thread from the dead since I have a new update and more questions.

Went ahead and bought the A/T switch and installed it into the car. Took a look at the pins beforehand and there's just the two previously mentioned that need wiring. Looking at the wiring diagrams below for the transmission ECU assembly, am I correct in assuming that I just need to pin & wire everything together?

ECUtek is able to use the A/T buttons to switch maps on the fly, but naturally I assume they have to be wired into the factory location on the ECU for it to work (which is the whole point of this project so far).
For the record, you can purchase this switch and plug and play right into your manual car. No other schenanigans required. :D

https://c1.staticflickr.com/5/4185/3...065800e9_b.jpg[/url]
https://c1.staticflickr.com/5/4192/3...ef04a41e_z.jpg