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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 413 (Engine Controls - Self Diagnostics - 8.1L) >> Self-Diagnostic System >> Power Mode Mismatch >> Test Description

Test Description

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The numbers below refer to the step numbers in the diagnostic procedure.

  1. 6

    This step tests for battery voltage on the signal circuits that are not required.

  2. 7

    This step tests for no battery voltage on the required signal circuits.

  3. 8

    If any ignition switch parameters that should be inactive in the present ignition switch position are active, 2 ignition switch signal circuits may be shorted together.

  4. 9

    This step eliminates open circuits as the cause of the malfunction.

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