Circuit/System Description

The content theft deterrent (CTD) system is a software based system in which the body control module (BCM) actively monitors certain inputs to determine if unauthorized vehicle access is being attempted. The driver door key cylinder switch is used as an input to disarm the CTD system. The driver door module (DDM) monitors the driver door key switch signal circuit to determine if the driver door cylinder is being rotated, indicating a vehicle key is being used to unlock the vehicle and the CTD system should be disarmed. The driver door key cylinder switch, located in the driver door latch assembly, provides a switched ground for the signal circuit. The DDM communicates the status of the driver door key cylinder switch to the BCM via serial data.