So . . . As you've already figured out, you wasted your money trying to get the OEM Infinity NAV unit to work. They were obsolete when they were made. Use your smartphone for Navigation.

Change out the radio head unit to a JVC Kenwood Marine unit. The OEM amp and speakers are actually very good (if your subwoofers are not deteriorated) but the OEM Infinity radio is junk!

Enjoy your Crossfire . . . They are the best sports car value on the planet!