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Diagnostic System Check - Theft Deterrent

WARNING: This page is about a different car, the 2002 Pontiac Montana, 2002 Oldsmobile Silhouette, and 2002 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.

Test Description 

  1. 2. Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
  2. 3. The symptoms list in Symptoms will determine the correct diagnostic procedure to use.
  3. 4. The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.
  4. 6. The presence of DTC B1000, B1004, B1007 or B1009 indicates an internal module fault.
  5. 7. The presence of DTC B1327, B1328, P0560 or P0620 indicates a battery voltage low/high condition.
Fig 1: Diagnostic System Check - Theft Deterrent
G01813528Courtesy of GENERAL MOTORS CORP.
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