The theft deterrent system on this vehicle is comprised
of two separate systems, the vehicle theft deterrent (VTD) system and the
    optional content theft deterrent (CTD) system. VTD, prevents drive away
  theft   by keeping the vehicle from starting.  CTD is the vehicle alarm
system   which   discourages unauthorized entry into the vehicle. These systems
are   described   and diagnosed  separately within  this  section.
Theft System Indicator(s)
SECURITY
The IPC illuminates the SECURITY indicator in the message center as
determined by the Vehicle Theft Deterrent (VTD) system. The IPC receives a
  class 2 message from the theft deterrent controller module requesting
  illumination.
|     •  | The VTD system requests the IPC to illuminate the indicator  only
when the ignition switch is ON. The VTD system uses the indicator as  a malfunction
   indicator. | 
 
|     •  | The Content Theft Deterrent (CTD) system uses the theft LED and
does not use the SECURITY indicator. | 
 
Theft LED
The body control module (BCM) illuminates the theft LED
(on top of the dash) based on the current Content Theft Deterrent (CTD) system
operation  mode. The theft  LED operates in the following modes:
Keyless Entry System (w/AU0)
The keyless entry system functions interact with the content theft deterrent
system but is diagnosed as a stand-alone system. Refer to 
Keyless Entry System Description and Operation 
  in Keyless Entry.
Radio with Theftlock
The theft deterrent system does not interact with radio theft lock equipped
vehicles. Radio theft lock is diagnosed as a stand-alone system. Refer  to 
Radio/Audio System Description and Operation 
 in
Entertainment.
CTD/VTD Description and Operation