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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 141 (Engine Controls Self-Diagnostics - 5.7L - Bi-Fuel) >> Diagnostic Tests >> DTC P0500: VSS Circuit >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. 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 procedures.

  1. 5

    This step tests for a proper vehicle speed output signal. The frequency created by the PCM is equal to about 1 Hz per mile an hour.

  2. 6

    This step tests for a proper vehicle speed output signal at the AF ECM. The frequency created by the PCM is equal to about 1 Hz per mile an hour.

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