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
DTC B1271: Theft LockedCircuit/System Description
To deter theft, the radio learns and stores the vehicle VIN. If the radio is removed from the vehicle and installed into another vehicle, the radio performs a VIN check. If the VIN stored in the radio and the VIN being reported over serial data do not match or no VIN is received, the radio will go into a theft lock state and be inoperative.
Conditions for Running the DTC
This test is run every 300 milliseconds.
Conditions for Setting the DTC
| • | The VIN received over serial data and the VIN as stored in the radio memory do not match. |
| • | No VIN is received over serial data. |
Action Taken When the DTC Sets
Radio functions are suspended. The radio will display LOC, LOCK, or LOCKED.
Conditions for Clearing the DTC
The DTC will clear when a valid VIN is received.
Reference Information
Schematic Reference
Radio/Navigation System Schematics
Connector End View Reference
Entertainment/Communication Connector End Views
Description and Operation
Radio/Audio System Description and Operation
Electrical Information Reference
Circuit/System Verification
Ignition ON, perform theft radio setup procedure. Refer to Radio Programming and Setup. Verify the DTC does not reset.
| ⇒ | If the DTC resets, replace the radio. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for radio replacement, programming, and setup
