Honda 2003 Civic Hybrid Owner's Manual page 138

Audio System
Displaying Audio System's Serial
Number
When the audio system disables
itself, you can see the eight-digit
audio system serial number on the
display. To display the serial
number:
1. Turn the ignition switch to
ACCESSORY (I) or ON (II).
2. Push the PWR/VOL knob to turn
on the audio system while
pressing the Preset 1 and 6
buttons at the same time.
You will see the first 4-digit
3.
number on the display for five
seconds, then the next 4-digit
number is shown for five seconds.
You will see 8-digit serial number
in total. This procedure is repeated
once again.
138
Comfort and Convenience Features
After you have entered the audio
system's code number correctly, the
serial number will not be displayed.