2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 320
* A history DTC will clear after 40 malfunction-free ignition cycles.
Reference Information
Schematic Reference
Theft Deterrent System Schematics (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Diagrams/Electrical Diagrams/Theft
Deterrent System Schematics)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
Content Theft Deterrent (CTD) Description and Operation (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Description
and Operation/Content Theft Deterrent (CTD))
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit
Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic
Procedures/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General
Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring
Repairs/Wiring Repairs)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Testing
Verify that DTC B291A is not set.
If the DTC is set, replace the B67 ultrasonic intrusion sensor.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Theft Deterrent Sensor Replacement (See: Accessories and Optional Equipment/Antitheft and Alarm Systems/Antitheft Motion
Sensor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup, and programming
B291B
DTC B291B
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B291B 00
- Content Theft Deterrent Sensor Malfunction
DTC B291B 39
- Content Theft Deterrent Sensor Internal Malfunction
DTC B291B 42
- Content Theft Deterrent Sensor Calibration Not Programmed
Circuit/System Description
