Tesla Model 3 Combo Pedal Pin Out?  [SOLVED]

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elShankos
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Tesla Model 3 Combo Pedal Pin Out?

Post by elShankos »

Hi All,

So I got one of these Tesla Model 3 combo units off ebay because.. it was cheap!
image.png
So I've hunted around and haven't had much luck in finding a pin out/wiring diagram for this unit - there are others out there that are similar with the 6 wires - so dual +ve, Gnd and wiper but not with these same colours. Has anyone maye used one of these successfully? If so, maybe you could share any pin out info?
image.png
I am using a Tesla SDU + OI arrangement - here is my conversion page I started:
https://www.diyelectriccar.com/threads/ ... on.208076/

I would also like to go the variable regen route like this for the SDU:
image.png
And the brake pedal sensor has 4 pins in it but only 2 leads are connected:
image.png
image.png

I tried looking up the sensor part number to get some info but not much luck.

So I wonder if this could be configured to give a variable output using the other 2 available pins?
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ScythianNite
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Re: Tesla Model 3 Combo Pedal Pin Out?

Post by ScythianNite »

I'm sorry i can't contribute, but I am also curious as to what makes the tesla 3/Y pedal special compared to any of the other 6 wire Ethrottle pedals on other vehicles.
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Re: Tesla Model 3 Combo Pedal Pin Out?

Post by davefiddes »

The Tesla M3 service manual is out there on the Internet. You'll likely have to torrent it (but I couldn't possibly comment). It has wiring diagrams which show the wiring of the two types of pedal:
Screenshot from 2023-01-10 13-52-05.png
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elShankos
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Re: Tesla Model 3 Combo Pedal Pin Out?

Post by elShankos »

So I figured out a bunch of the info from this great video from Ingineerix here:

I then stuck 5V across the relevant pins and made this short video where you can see the voltage returns on the 2 return pins:


Hopefully it's helpful!

I still want to fiddle around with the break switch which just has 2 out of 4 pins used at the moment - I wonder what the other 2 pins are for? :)
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Re: Tesla Model 3 Combo Pedal Pin Out?

Post by davefiddes »

Did you find the Service Manual OK?
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Re: Tesla Model 3 Combo Pedal Pin Out?  [SOLVED]

Post by elShankos »

davefiddes wrote: Wed Jan 11, 2023 4:53 pm Did you find the Service Manual OK?
No, I did a bit of hunting but then figured out what pins are what from the Ingineerix video - so I think for my conversion I will use ones that go from 0.8V > 3.8V. Hopefully that works!
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Re: Tesla Model 3 Combo Pedal Pin Out?

Post by elShankos »

I opened up the brake pedals switch out of curiosity and inside its just a sort of slider switch with 2 sides - NO/NC:
image.png
image.png
Hopefully useful for others who might wonder about it too. :)
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