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 System Controller In Learn ModeCircuit/System Description
When learning a coded key, the theft deterrent module (TDM) 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 TDM does not exit learn mode, B3031 will remain current and indicate a fault.
Conditions for Running the DTC
The immobilizer system is the learn coded keys state.
Conditions for Setting the DTC
DTC B3031 will set any time the TDM enters the learn coded keys state.
Action Taken When the DTC Sets
The security indicator will illuminate.
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
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
Important: When performing the 10-Minute Vehicle Key Relearn Procedure, all keys not learned at that time will be erased and not be recognized. Perform the Adding Keys procedure on all keys or instruct the customer how to perform the Adding Keys procedure should all keys not be present at the time of repair.
- Verify DTC B3055 is not set.
- Verify the scan tool TDM Learn Coded Key parameter displays Yes.
- Perform the 10 Minute Vehicle Key Relearn procedure. Refer to Replacing Keys. The TDM should exit the learn coded key state and DTC B3031 should clear.
| ⇒ | If the DTC is set, refer to DTC B3055. |
| ⇒ | If not the specified value, perform the 10 Minute Vehicle Key Relearn procedure. Refer to Replacing Keys. |
| ⇒ | If the TDM does not exit the learn coded key state after the programming attempt, replace the TDM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for TDM replacement, setup and programming
