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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 378 (Engine Controls Self-Diagnostics - 3.1L Engine) >> Diagnostic Tests >> DTC P0506: Idle Speed Low >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix, 2003 Chevrolet Malibu, and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers in the 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 valve control 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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