2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 436
Display Actuator Replacement)
* Video Display Replacement (See: Accessories and Optional Equipment/Entertainment Systems/Television / Monitor/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning)for radio and amplifier replacement, programming,
and setup
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 Protection Active
Circuit/System Description
When the radio is initially installed in the vehicle, the radio receives VIN information via serial data. The radio stores a portion of the VIN and
compares this sequence to the VIN information received each time the radio powers on. The VIN in the radio is a single one-time learn.
The radio theft deterrent system is intended to disable or limit radio functionality if incorrect vehicle information is received by the radio. The radio
disables functionality if the VIN information received by the radio does not match the VIN information that has been learned by the radio. This
DTC is generated by the module when the Theft Protection is activated.
Conditions for Running the DTC
This DTC test runs when the radio changes from OFF to ON.
Conditions for Setting the DTC
The radio has learned a correct VIN sequence and the VIN information received via serial data does NOT match the learned VIN sequence.
Action Taken When the DTC Sets
The radio may be disabled or have limited functionality. The radio display will indicate that theft protection is active.
Conditions for Clearing the DTC
The radio receives the correct VIN information via serial data.
Diagnostic Aids
A possible cause of incorrect VIN info could be the radio was originally installed in another vehicle.
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/Connector End Views By Name)
Description and Operation
Radio/Audio System Description and Operation (See: Accessories and Optional Equipment/Description and Operation/Radio/Audio System)
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)
