Radio Displays LOC, LOCKED, or CODE
Radio Displays LOC, LOCKED, or CODE
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Diagnostic System Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Strategy Based Diagnosis) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Diagnostic Procedure Instructions)provides an overview of each diagnostic category.
Circuit/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. The radio will also display LOC, LOCKED, or CODE.
Reference Information
Schematic Reference
Radio/Navigation System Schematics (Radio/Navigation System Schematics)
Connector End View Reference
Component Connector End Views (Connector End Views By Name)
Description and Operation
Radio/Audio System Description and Operation (Radio/Audio System)
Electrical Information Reference
* Circuit Testing (Circuit Testing)
* Connector Repairs (Connector Repairs)
* Testing for Intermittent Conditions and Poor Connections (Testing for Intermittent Conditions and Poor Connections)
* Wiring Repairs (Wiring Repairs)
Scan Tool Reference
Control Module References (Programming and Relearning)for scan tool information
Circuit/System Verification
Ignition ON, perform radio setup procedure. Refer to Radio Programming and Setup (Radio Programming and Setup). Verify the radio operates normally and no messages are displayed on the radio.
If the message continues to display on the radio, replace the radio.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
Control Module References (Programming and Relearning)for radio replacement, programming, and setup