For 1990-2009 cars only
The theft deterrent system on this vehicle is comprised of 2 separate systems, the Vehicle Theft Deterrent (VTD) System and the 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 system are described and diagnosed separately within this section.
SECURITY Indicator
The SECURITY indicator on the instrument cluster is controlled by both the VTD System and the CTD System. The SECURITY indicator is controlled by the body control module (BCM) through the class 2 data line.
| • | The VTD System contained in the BCM commands the instrument cluster to control the SECURITY indicator only when the ignition switch is ON. The VTD System uses the indicator as a malfunction indicator. |
| • | The CTD System also contained in the BCM commands the instrument cluster to control the indicator only when the ignition switch is OFF. The CTD System uses the SECURITY indicator to identify system status. |
CTD/VTD Description and Operation
Refer to the following for the appropriate description and operation:
