2010 Cadillac CTS Sedan AWD V6-3.6L Page 338
)Radio Antenna Module Replacement (Wagon) (See: Accessories and Optional Equipment/Antenna/Antenna, Radio/Service and Repair) for
radio antenna module replacement
* Radio, Video, Audio Disc Player, and Navigation Information Display Replacement (See: Accessories and Optional Equipment/Radio,
Stereo, and Compact Disc/Radio/Stereo/Service and Repair/Radio, Video, Audio Disc Player, and Navigation Information Display
Replacement) for navigation display replacement
B1271
DTC B1271
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 Descriptor
DTC B1271 00
- Theft Locked
Circuit/System Description
This DTC is generated by the module when the Theft Lock is activated. This occurs when the VIN as received over the data communication circuit
and the VIN as stored in the module memory do not match. This also occurs when no VIN is received over the data communication circuit. The
only circuit required is the communication line.
Conditions for Running the DTC
This DTC test runs when the radio changes from OFF to ON.
Conditions for Setting the DTC
This DTC is generated by the module when the VIN as received over the data communication circuit and the VIN as stored in the module memory
do not match. This also occurs if no VIN is received over the data communication circuit.
Action Taken When the DTC Sets
The radio does not function. The radio will display indicate that Theftlock is active.
Conditions for Clearing the DTC
Re-calibration with the correct calibrations for the vehicle and cycling the radio to OFF then to ON will clear the DTC if there is no damage to the
radio.
Reference Information
Schematic Reference
Radio/Navigation System Schematics (See: Accessories and Optional Equipment/Diagrams/Electrical Diagrams/Radio/Navigation System
Schematics)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views)
Description and Operation
Radio/Audio System Description and Operation (See: Accessories and Optional Equipment/Description and Operation/Radio/Audio System
Description and Operation)
Electrical Information Reference
* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)
* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit
Testing/Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)
