Saturn 2004 Ion - Manual (Page 180)

Theft-Deterrent Feature
The Radio with Single CD (MP3) and the Radio with
Six-Disc CD (MP3) have a theft deterrent feature.
The theft deterrent feature is designed to discourage
theft of your vehicle’s radio. It works by using a secret
code to disable all radio functions whenever battery
power is interrupted.
The theft deterrent feature for the radio may be used or
ignored. If ignored, the radio plays normally and the
radio is not protected by the feature. If the theft deterrent
feature is activated, the radio will not operate if stolen.
When the theft deterrent feature is activated. LOCK
will appear on the radio display to indicate a locked
condition anytime battery power has been removed.
If the battery loses power for any reason, you must
unlock the radio with the secret code before it will
operate.
Activating the Theft-Deterrent Feature
The instructions which follow explain how to enter
your secret code to activate the theft deterrent feature.
Read through all 10 steps before starting the
procedure.
If you allow more than 15 seconds to elapse between
any steps, the radio automatically reverts to time
and you must start the procedure over at Step 4.
1. Write down any four-digit number from 0000 to
9999 and keep it in a safe place separate from
the vehicle.
2. Turn the ignition to RUN.
3. Turn the radio off.
4. Press the 5 and 6 pushbuttons at the same time for
five seconds. -- -- -- -- will appear on the display.
Next you will use the secret code number which you
have written down.
5. Press the SEEK/SCAN down or SEEK left arrow to
make the first digit agree with your code.
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