How to Obtain the Audio Unit Serial Number

WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.

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), or press the engine start/stop button to select the ON mode
Make sure the audio system is turned off
Push and hold the preset No 1 and No 6 buttons
While holding the buttons, push the VOL PUSH PWR knob to ON
Release the buttons, and the self-diagnostic begins

Fig 1: Identifying Preset No 1 And No 6 Buttons And VOL PUSH PWR Knob
Courtesy of AMERICAN HONDA MOTOR CO., INC.
The display shows an 8 digit serial number

Fig 2: Screen Display - Digit Serial Number
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Use all 8 numbers as the serial number when using the Interactive Network (iN) to retrieve the 5 digit anti-theft code
To end the self-diagnostic function, turn the audio system off, or turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode