Get Serial for Honda 2008 HCH

2008 HCH Navigation 

Here's how: After the navi unit is turned on, hold down the
buttons for 3 seconds, until the hidden diagnostic menu comes up. Then go to , and finally . This will display the navi unit serial number on the screen.

THEN, you can go to the Honda ownerlink site and enter the VIN, your address and telephone number, the Serial #, and voila, it produces the unlock code!