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. |
Circuit Description
Theft Lock is activated 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.
Diagnostic Aids
This symptom may be an indication that an incorrect radio is installed in the vehicle, or that the radio was replaced without reprogramming with the new information.
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
Scan Tool Reference
Circuit/System Verification
Verify LOC, LOCKED, or CODE is not displayed on radio.
| ⇒ | If the radio displays LOC, LOCKED, or CODE, reprogram the radio. If the radio still displays LOC, LOCKED, or CODE after performing the reprogramming procedure, replace the radio. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for Radio replacement, setup, and programming
