Theft Deterrent
The "Theftlock" theft deterrent system is a feature on all base and
uplevel
radios. There is no need to program a security code into the radio as in
past model years. The theft deterrent system now utilizes class 2 serial
data to determine if the radio is in the appropriate vehicle. Each time
the
radio receives the "run" power mode message, it compares the VIN
information
it has stored to the VIN information received from a module on the class 2
serial data circuit responsible for transmitting that information. If a
mis-match occurs, the radio display will indicate to the user the radio is
locked. Once this takes place, a DTC will set, the radio will not respond
to
any button presses and become inoperative. The two scenarios able to cause
this condition are:
A radio is installed from another vehicle
A module which communicates on the class 2 serial data circuit which
supplies VIN information to the radio is replaced and not properly setup
with the correct VIN information for that vehicle
The only way to unlock the radio is by using a scan tool. Always refer to
the table in this section to diagnose the "Theftlock" DTC for further
information.
"tom" <tpfijalkovic1@[EMAIL PROTECTED]
> wrote in message
news:4qOdncwJiLggelrfRVn-gA@[EMAIL PROTECTED]
> on my 02, sometimes when i start it up the radio will display "locked"
an
> the anti-theft light will be lit, manual says return to dealer, but
there
> has to be a simple fix, it happens frequently but not always???
>
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