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Home >> Chevrolet >> 1999 >> Cutaway 6.5 F >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Anti-Theft System >> Diagnostic Tests >> DTC B3031: Security System Controller In Learn Mode >> Testing Procedure

Testing Procedure

  1. If the VTD Diagnostic System Check was performed, go to the next step. If not, go to DIAGNOSTIC SYSTEM OPERATION CHECK - ANTI-THEFT (DOMESTIC)  under TROUBLE SHOOTING.
    2. NOTE: If the Passlock™ module learns an analog voltage code when the ignition switch is turned to the CRANK position, or a Passlock™ module is replaced and the ignition is turned to the ON position, DTC B3031 will be set until the module sees a CRANK switch position or until the Passlock™ sensor has latched.
  2. If the Passlock™ sensor has just been replaced, go to the next step. If the Passlock™ sensor has not just been replaced, go to step  4.
  3. Turn the ignition switch to CRANK and the back to the ON position. In the CRANK position the Passlock™ module will receive an analog voltage code from the sensor. Turning the ignition switch to CRANK will reset DTC B3031 in a new module. If the operation is complete, go to DIAGNOSTIC SYSTEM OPERATION CHECK - ANTI-THEFT (DOMESTIC)  under TROUBLE SHOOTING.
  4. Connect a scan tool. Read the Passlock™ system current diagnostic trouble codes (DTCs). Inspect for the following DTCs: DTC B2947, DTC B2948, DTC B 2957 and DTC B2958. If a condition is present in one of the following circuits, troubleshoot the appropriate DTC prior to diagnosing DTC B3031: CKT 812, CKT 1836 and CKT 1057. If one or more of the DTCs are set, go to DIAGNOSTIC TROUBLE CODE DEFINITIONS (DOMESTIC) . If one or more of the DTCs are not set, go to the next step.
  5. Replace the Passlock™ sensor in the electronic column lock module assembly on models with tilt wheels and standard wheels. See REMOVAL & INSTALLATION in STEERING COLUMNS - TRUCKS - EXCEPT TRACKER article. If the repairs are complete, go to step  7. If the repairs are not complete, go to the next step.
  6. Replace the Passlock™ module. See ANTI-THEFT MODULE  under REMOVAL & INSTALLATION. If the repairs are complete, go to the next step.
  7. Reconnect all the previously disconnected connectors and the components. Turn the ignition switch ON. Connect the scan tool. Clear the DTCs. Perform one of the following Passlock™ reprogramming procedures: After repair, recheck system. See DIAGNOSTIC SYSTEM OPERATION CHECK - ANTI-THEFT (DOMESTIC)  under TROUBLE SHOOTING.
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