So if im understanding you and the website correctly:
# Connect the INTERFACE's White wire to Pin 18, Brown wire of the above connector
# Pin 19, Green wire needs to be grounded.
# Jump to section 4 (skip all steps (1-23) in the table)
if so, that still doesnt tell me where i hookup the headphone jack or how the unit hooks up to the factory steering wheel wiring
i ask u keep in mind ive never installed one of these before and while i installed the AVIC myself I cannot claim i know 100% what the heck is going on all the time... i dont wanna bug or frustrate you but a little more clarification would be GREATLY appreciated 