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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 827 (Body Rear End) >> Diagnostic Information and Procedures >> Diagnostic System Check - Body Rear End >> Test Description

Test Description

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The numbers below refer to the step numbers 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. 3.  Checks BCM for DTCs.
  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.
Fig 1: Diagnostic System Check - Body Rear End
G01459358Courtesy of GENERAL MOTORS CORP.
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