2004-2007 Honda Aquatrax ARX1200N3/T3/T3D Factory Service Manual, Page 471Get this manual
METERSWITCHES 3With the "MODE" and "SET" buttons pushed, fit the safety lanyard clip to the base of the engine stop switch and hold the "MODE" and "SET" buttons for at least secondsThe ID Nomark and the first digit of the ID number come on and start blinking, and the warning buzzer beepsARX1200T3N3 shown: ID NoMARK "SET" BUTTON
"MODE" BUTTON 4Push the "ID No button until "9" is displayed5Push the "ID SET" buttonThe second digit of the ID number starts blinking
(ARX1200T3D) "ID No BUTTON "ID SET" BUTTON
"ID No BUTTON 6Push the "ID No button until "9" is displayed7Push the "ID SET" buttonThe third digit of the ID number starts blinking"ID No BUTTON "ID SET" BUTTON