New Pedal - Pinout

TL;DR: Old pedal is lost, new pedal is not the same and uses a hall effect instead of a pot, and so we will need to modify the pedal interface board and associated FW slightly.

The old pedal was lost in abyss and so we ripped a different pedal out of a different car. We have to reverse engineer it’s pinout a bit, and that’s what this page is for.

The pedal comes with a six pin connector whose mating part we also took because it is not a standard Molex connector. We cannot lose the mating connector (or the pedal really).

<insert pics of connector and pedal>

The way I’m going to identify the pins and the ability to react in a change of resistance for the combo is based on the colour of the wire coming out of the header. At no point will these wires be cut because again, we do not want to find a new connector or the correct crimps since we don’t have this readily available.

The following table outlines the reactions from the different wire combos that produced output

It was then figured out that the new pedal does not use a pot at all. In fact, it uses a hall effect sensor that has rotating magnets based on the pressing of the pedal changing a voltage reference output.

Unfortunately, trying to figure out the pinout showed that the hall effects no longer work, and is perhaps why the pedal was found in the junkyard. However, I have attached a new hall effect that atm (until I epoxy it down) gives a range of around 200mV for the extent of pressing the pedal, using a 3V3 reference. Currently the range is around 400mV to 600mV, and with a differential + non-inverting amp config, we can amplify it to a much larger range.