How to Obtain the Audio Unit Serial Number

NOTE: This procedure can only be done after the power has been disconnected and reconnected to the audio unit, and the audio unit displays CODE when the audio unit is turned on.

Turn the ignition switch to ON (II).
Make sure the audio system is turned off.
Press and hold the preset No. 1 and No. 6 buttons.
While holding the buttons, push the power button (A) on.

Fig 1: Identifying Power Button
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Release the buttons, and the self-diagnosis begins.
The display shows an 8-digit serial number, for example, SN12345678, appears on the display.
Use all 8 numbers as the serial number when using the Interactive Network (iN) to retrieve the 5-digit anti-theft code.
The self-diagnostic mode ends when you turn off the audio unit or turn the ignition switch to LOCK(0).