Service Information

Volt

DTC B3031

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 B3031 00: Security Controller In Learn Mode Malfunction

When learning a coded key, the body control module (BCM) is placed in learn mode. DTC B3031 will set automatically as an indicator that the system is in learn mode and not as a fault indicator. Once the coded key is learned, learn mode will be exited and the DTC cleared. If the BCM does not exit learn mode, B3031 will remain current and indicate a fault. The instrument cluster security indicator will illuminate and the driver information centre will display a message.

Conditions for Running the DTC

The immobilizer system is the learn coded keys state.

Conditions for Setting the DTC

The DTC will set any time the BCM enters the learn coded keys state.

Action Taken When the DTC Sets

The security indicator will illuminate. The driver information centre will display a message.

Conditions for Clearing the DTC

•	A current DTC B3031 will be cleared upon the successful exit of learn mode.

•	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

Control Module References for scan tool information

Circuit/System Verification

Verify all available keys are correct for the vehicle. This can be accomplished by comparing the part number that is laser etched on the key to the part number listed in the parts catalogue.

⇒	*If a key is not correct*

Replace the key

⇓	*If all keys are correct*

Perform the Vehicle Key Relearn procedure. Refer to Key with Integrated Transmitter Programming .
Verify the BCM learns the vehicle key and exits the learn coded key state. The scan tool BCM Master Keys Learned parameter should increment to 1.

⇒	*If the BCM does not exit the learn coded key state after the programming attempt*

Replace the K9 body control module

⇓	*If the BCM exits the learn coded key state after the programming attempt*

All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References - for BCM replacement, setup, and programming