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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 78 (Engine Controls - Self-Diagnostics - 4.8L, 5.3L & 6.0L) >> Diagnostic Tests >> DTC P0507: Idle Control System - High Rpm (Without Electronic Throttle Control) >> 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 valve circuits with a ground. On a normally operating system, the test lamp should not flash while the IAC counts are incrementing.

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