Pioneer Detachable Faceplate

I originally posted this in the project guidance section, but no answered it there. I am hope someone here will be able to help me. I have an old Pioneer detachable faceplate that I would like to use, but I am not sure how to wiring it up to my arduino uno or if it's even possible or not. I know I'll have to power the LCD externally because it's 13.v and display data comes across pin 3 because I was able to find the service manual and I have linking a few pages about the lcd driver and keyboard controller IC. I was wondering if someone could take look and see if they can help me wire it up.

Keyboard Unit PCB Keyboard Unit Wire Harness LCD Driver and Keyboard Controller IC LCD

Good luck. It looks like the controller is a custom part - that is, there is no datasheet for it out in the wild, so I would forget it, if I were you.

// Per.