For 1990-2009 cars

The theft deterrent system on this vehicle is comprised of the vehicle theft deterrent (VTD) system. The VTD system prevents drive away theft by keeping the vehicle from starting.

### Security Indicator

The instrument panel cluster (IPC) illuminates the SECURITY indicator as determined by the vehicle theft deterrent (VTD) system. The IPC receives a class 2 message from the theft deterrent control module requesting illumination. The VTD system requests the IPC to illuminate the indicator only when the ignition is ON. The VTD system uses the indicator as a malfunction indicator. For vehicle theft deterrent (VTD) information, refer to Vehicle Theft Deterrent (VTD) Description and Operation .

### Radio with Theftlock

The vehicle theft deterrent (VTD) 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.