Hi. I went to Nissan and they told me it has to get reseted by Clarion theyl have to send it to them and they gonna set it back to New so once i connect it to my cars can bus it will take the code from my ecu and be recognized and mine .it stores the Navigations Code and Vin number inside the eeprom and it binds together with that certain vehicle once first ignition is turned on. My car has already a BOSE system and amp i made my self a harness cable from the one i bought the navigation and everything works now ill have to pay around 200euros to clarion to set it back or try to hack it my self by reading the navigations eeprom then my factory radion and rewrite the code of my ecu to the navigation i will let you know if the experiment work and how you could do it your self if needed
