shizzledog

My 2000 LX470 has a 22 pin connector going to the Nakamichi amp, etc. I have searched and looked at everything I could find, but nothing matches this unit that I've found. I was told by a local stereo shop that they have successfully installed aftermarket head units and kept the factory amps/speakers. Does anybody have wiring diagrams that will work for this unit?

Here's a picture of the connector. Thanks!

Nakamichi pics