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

[davmandave]

Originally Posted by markitect

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.

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

[tato.valverde]

Originally Posted by The_Understated

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

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 =)

[markitect]

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.

[tato.valverde]

Originally Posted by markitect

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?

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!

[The_Understated]

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.

[markitect]

Originally Posted by tato.valverde

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

Thanks for your help!

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

[markitect]

Originally Posted by The_Understated

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.

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.

[davmandave]

Originally Posted by markitect

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

[markitect]

Originally Posted by davmandave

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


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

[davmandave]

Originally Posted by markitect

Attachment 146158

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.

[tato.valverde]

Originally Posted by The_Understated

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

[tato.valverde]

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 )

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

Thanks!!

[davmandave]

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

Sent from my A0001 using Tapatalk

[The_Understated]

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.

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