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Home >> GMC >> 2003 >> Jimmy 2D Utility, Part Time, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System & Component Testing - 4.3L >> Idle Control System >> Idle Air Control System Diagnosis >> Test Description
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Test Description

The number below refers to step number in diagnostic procedure.

  1. 5  - This test will determine the ability of the PCM and IAC valve control circuits to control the IAC valve.
  2. 7  - This test will determine the ability of the PCM to provide the IAC control valve circuits with a ground. On a normally operating system, the test light should not flash while the IAC Counts are incrementing.

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