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Home >> Cadillac >> 2004 >> Escalade EXT >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Theft Deterrent System >> Diagnostic Information and Procedures >> DTC B3031: Security System Controller in Learn Mode >> Test Description
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Test Description

The number below refers to the step number on the diagnostic table.

  1. 3:  Tests for the proper operation of the 12-volt reference Security Sensor Power circuit, sensor ground circuit, and Passlock™ sensor signal (data) circuit. Troubleshoot the appropriate DTC prior to diagnosing DTC B3031.
DTC B3031

Step Action Yes No
Schematic Reference: Theft Deterrent System Schematics 
1 Did you perform the Vehicle Theft Deterrent (VTD) Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Theft Deterrent 
2
  1. Install a scan tool.
  2. Momentarily rotate the ignition switch to CRANK. Do not start the vehicle.
  3. Release the ignition switch to ON.
  4. Select the body control module display DTCs function on the scan tool.
Does the scan tool display DTC B3031 as a current DTC?		 Go to Step 3  Go to Step 4 
3  Does the scan tool display DTC B2947, B2948, B2957, B2958, B2960, or B3033? Go to Diagnostic Trouble Code (DTC) List  Go to Step 4 
4
  1. Use the scan tool in order to clear the DTCs.
  2. Turn OFF the ignition.
  3. Start the vehicle.
  4. Select the body control module display DTCs function on the scan tool.
Does the DTC reset?		 Go to Step 3  System OK
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