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Home >> Chevrolet >> 2002 >> Venture Base, Van Cargo Extended >> Repair and Diagnosis >> External Pages >> Different car >> Section 128 (Starting System) >> Self-Diagnostic System >> Engine Electrical Diagnostic System Check >> Test Description
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Test Description

WARNING: This page is about a different car, the 2002 Cadillac Eldorado. 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. 4  - Lack of communication may be because of 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. 5  - The SYMPTOM INDEX  table will determine the correct diagnostic procedure to use.
  3. 6  - The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will collect all the available information before you perform tests.

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