Skip to content
Tahoe / Yukon Service Manual

Content Theft Deterrent Malfunction

Diagnostic Instructions Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Review Strategy Based Diagnosis for an overview of the diagnostic approach. Diagnostic Procedure Instructions provides an overview of each diagnostic category. Circuit/System Description The content theft deterrent 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. Based on inputs such as the door ajar switches, hood ajar switch (if equipped), the rear compartment ajar switch (if equipped), and the intrusion/inclination sensor (if equipped), the BCM determines whether a content theft deterrent alarm is warranted. If unauthorized access is being detected, the BCM will sound the power sounder and flash the exterior lamps as a means of theft deterrence. Diagnostic Aids The scan tool Content Theft Deterrent Trigger History 1, 2, and 3 parameters can be used to help isolate an intermittent unwanted content theft deterrent alarm. These parameters are a rolling history of the previous three causes of a theft deterrent alarm. If all three parameters are indicating the same alarm trigger, the indicated input should be the starting point when diagnosing an intermittent concern. Reference Information Schematic Reference Theft Deterrent System Schematics Connector End View Reference Master Electrical Component List Description and Operation Theft Systems Description and Operation Electrical Information Reference Circuit Testing Connector Repairs Testing for Intermittent Conditions and Poor Connections Wiring Repairs Scan Tool Reference Control Module References for scan tool information Circuit/System Verification

  1. Ignition OFF/Vehicle OFF.
  2. Verify each indicator/message transitions between the ajar and closed state while opening and closing each vehicle door, hood, and rear compartment. f h i di / d h ⇒ If the indicator/message does not change Refer to Vehicle Access. ⇓ If each indicator/message changes
  3. Completely lower the driver door window and close all vehicle doors, ignition OFF/Vehicle OFF.
  4. Arm the content theft deterrent system by locking the door with the keyless entry transmitter.
  5. Verify the scan tool Content Theft Deterrent Alarm Status parameter is Armed. ⇒ If not Armed Refer to Keyless Entry System Malfunction. ⇓ If Armed
  6. Without disarming the system, reach in through the open driver window and open the driver door.
  7. Verify the scan tool Content Theft Deterrent Alarm Status parameter is Alarm. ⇒ If not Alarm Replace the K9 Body Control Module. ⇓ If Alarm
  8. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair. Control Module References for body control module replacement, programming, and setup.