Honda RDX Owner's Manual page 297

Auxiliary Input Jack
Auxiliary Input Jack, Radio Theft Protection
The auxiliary input jack is on the disc
changer unit. The system will accept
auxiliary input from standard audio
accessories.
When the audio system is on and you
plug in a mini-jack cable between a
compatible audio unit and the jack,
you will see AUX in the display and
the system automatically switches to
AUX mode.
Radio Theft Protection
If your vehicle's battery is
disconnected or goes dead, the audio
system disables itself. If this
happens, you will see ''ENTER
CODE'' in the frequency display next
time you turn on the system. Use the
preset bars (Icons on models with
navigation system) to enter the five-
digit code. The code is on the Anti-
theft Identification Card included in
your owner's manual kit. When it is
entered correctly, the radio will start
playing.
The Anti-theft Identification Card
also lists your audio serial number. It
is best to store the card in a safe
place at home. In addition, you
should write the audio system's
serial number in this owner's manual
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