[geruta]

I really miss the vehicle speed adjustments to the audio with the original head unit and I'd like to attempt to recreate this feature with my new AppRadio4 headunit.

I have an idea on how to get this feature back and wanted to know what you guys thought.

Tap into the VSS (Vehicle Speed Sensor) wire and depending on the speed, a different voltage is sent through the wire.

Using an arduino, receive the voltage from the VSS as input and create "map" in software that accepts the different voltages, and maps those out to different volume up or down commands that can be sent to the hard wired steering wheel control input on the back on the headunit.

What I'll need to do is understand what is going across the wire when a vol up and down is pressed and be able to recreate that with the arduino, again using the VSS voltage changes as input.


Does this makes sense? Also, has anyone attempted to do something similar with their "86"?