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Content Theft Deterrent (CTD) Does Not Disarm with Key LockDiagnostic Instructions
Diagnostic Fault Information
Circuit/System DescriptionThe content theft deterrent system is a software based system in which the body control module actively monitors certain inputs to determine if unauthorized vehicle access is being attempted. The driver door lock cylinder switch is used as an input to disarm the content theft deterrent system. The driver door module 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 content theft deterrent system should be disarmed. The door key cylinder switch, located in the door latch assembly, provides a switched ground for the signal circuit body control module. Reference InformationSchematic ReferenceDoor Lock/Indicator Schematics Connector End View ReferenceDescription and OperationContent Theft Deterrent (CTD) Description and Operation Electrical Information ReferenceScan Tool ReferenceControl Module References for scan tool information Circuit/System VerificationIgnition ON, verify the scan tool Driver Door Key Cylinder Lock/Unlock Switch parameter cycles between Inactive and Active while turning the driver door lock cylinder with the vehicle key. Circuit/System Testing
If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the A15 body control module. If not the specified value, test the signal circuit terminal for a short to ground. If the circuit tests normal, replace the A15 body control module. If not the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 body control module. Repair InstructionsPerform the Diagnostic Repair Verification after completing the diagnostic procedure.
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