B3031

Diagnostic Chart:

Schematic:

CIRCUIT DESCRIPTION
In this mode, the body control module (BCM) will learn the current Passlock(TM) sensor code value. The following list is the two theft relearn procedures:
- Scan Tool Relearn Procedure PASSLOCK Reprogramming Seed and key
- Auto-Learn Procedure PASSLOCK Reprogramming Auto Learn

CONDITIONS FOR SETTING THE DTC
- A new BCM has been installed and the ignition is turned to the ON position but not rotated to the CRANK position. Once the ignition switch has been rotated to the CRANK position, the BCM will learn the Passlock(TM) code. The theft relearn procedure will need to be run in order to make the powertrain/vehicle control module (PCM/VCM) receive the correct fuel enable password.
- The BCM is in the learn mode but does not see a valid Passlock(TM) sensor code because of a sensor or a wiring problem.

ACTION TAKEN WHEN THE DTC SETS
The vehicle will not run. The security telltale will be ON.

CONDITIONS FOR CLEARING THE MIL/DTC
- The DTC will clear after an ignition cycle has occurred after the BCM has learned a valid code.
- Using a scan tool.

DIAGNOSTIC AIDS
- Prior to replacing a BCM, ensure that all of the diagnostics have been completed. Refer to Diagnostic Trouble Code (DTC) List/Type.
- Inspect the PasslockTM sensor harness for intermittent or poor connections. Refer to Testing for Intermittent and Poor Connections in Wiring Systems.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
3. Tests for the proper operation of the 12 v reference (Security Sensor Power) circuit, sensor ground circuit, and Passlock(TM) sensor signal (data) circuit. Troubleshoot the appropriate DTC prior to diagnosing DTC B3031.