For 1990-2009 cars only
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 B3976 00: Unconfigured TransponderCircuit/System Description
When the body control module (BCM) is in the learn coded key state, the BCM 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 BCM is in the learn coded key state. |
Conditions for Setting the DTC
The BCM has determined the current key is not configured as a proper vehicle key.
Action Taken When the DTC Sets
| • | Vehicle starting will be disabled. |
| • | The security indicator in the instrument cluster will be illuminated. A service message will be displayed in the driver information center. |
Conditions for Clearing the DTC
| • | A current DTC will be cleared when the BCM 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
Schematic Reference
Connector End View Reference
Description and Operation
Immobilizer Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
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 appropriate key. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
