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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 377 (Engine Controls - Self-Diagnostics - 4.3L) >> Diagnostic Tests >> DTC P0506: Idle Control System - Low Rpm >> Test Description

Test Description

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The number below refers to the step number in the diagnostic procedures.

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

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