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Test Description

WARNING: This page is about a different car, the 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

The number(s) below refer to the step number(s) on the diagnostic table.

  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. 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.
  3. 6.  The listed DTCs are internal module malfunctions and should be corrected before attempting any other diagnostics.
  4. 7.  The listed DTCs are battery voltage related malfunctions and should be corrected before attempting any other diagnostics.
Fig 1: Identifying Diagnostic System Check - Theft Deterrent
G01779963Courtesy of GENERAL MOTORS CORP.
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