DTC B3976. Buick Lucerne 2006

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2006 🢒 Lucerne 🢒 Vehicle Control Systems 🢒 Computer/Integrating Systems 🢒 DTC B3976

DTC Descriptor

DTC B3976 46 : Unconfigured Transponder/Vehicle Configuration Not Programmed

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

Circuit/System Description

When the theft deterrent module (TDM) is in the learn coded key or learn more keys mode, the TDM checks the current key to ensure it has been configured as a proper vehicle key.

Conditions for Running the DTC

•	Ignition is in the Accessory or Run position.

•	The TDM is in the learn coded key or learn more keys mode.

Conditions for Setting the DTC

The TDM has determined the current key is not configured as a proper vehicle key.

Action Taken When the DTC Sets

The security indicator will be illuminated.

Conditions for Clearing the DTC

•	A current DTC will be cleared when the TDM detects a properly configured vehicle key.

•	A history DTC will be cleared after 100 malfunction free ignition cycles or when a scan tool is used to clear DTCs.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

•	Scan Tool Data List

•	Scan Tool Data Definitions

Important: When using this diagnostic, more than one vehicle key is required to ensure proper diagnosis. If more than one key is not available at the time of service, contact the customer and ask if any other keys can be provided for service. If unavailable, a new second key can be created.

While viewing DTCs with a scan tool, attempt to start the vehicle using all of the available keys. The vehicle should start with all available keys.

⇒	If any key results in inoperative starting and DTC B3976 is set as current, replace the suspect key.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Replacing Keys

•	Adding Keys

•	Control Module References for Theft Deterrent Module replacement, setup, and programming.