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Tahoe / Yukon Service Manual

DTC B19F3

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. DTC Descriptor Theft Deterrent Module Circuit/System Description The body control module performs various internal fault detection test to determine if a software or hardware concern exists within the power sounder content theft deterrent alarm module. No external circuits are involved. Conditions for Running the DTC The ignition is OFF. The vehicle is in Park. Conditions for Setting the DTC The body control module has detected an internal failure within the power sounder content theft deterrent alarm module. Action Taken When the DTC Sets The intrusion and inclination functionality is disabled. Conditions for Clearing the DTC A current DTC is cleared when the conditions for setting the DTC are no longer present. A history DTC will clear after 40 malfunction free ignition cycles. 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 Testing

  1. Ignition ON.
  2. Verify DTC B19F3 is not set. ⇒ If the DTC is set Test or replace the P25 Content Theft Deterrent Alarm Module. ⇓ If the DTC is not set
  3. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair.