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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 93 (Entertainment Systems) >> Diagnostic Information and Procedures >> DTC B1780 - Theftlock Enabled >> Test Description

Test Description

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  Clear all DTCs and radio theft information. Cycle the ignition in order for the radio to learn the VIN.
  2. 3:  Clear all DTCs after the repair procedure is complete.
DTC B1780

Step Action Yes No
1 Did you perform the Diagnostic System Check - Vehicle? Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2 
  1. Install a scan tool.
  2. Use the scan tool in order to clear the DTCs.
  3. With the scan tool clear the radio theft information.
  4. Turn OFF the ignition.
  5. Turn ON the ignition, with the engine OFF.
Does the DTC Reset?		 Go to Step 3  System OK
3  Replace the radio. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming.
Did you complete the replacement?		 System OK -
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