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Home >> Pontiac >> 2003 >> Aztek FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics >> Diagnostic Tests >> DTC P0502: Vehicle Speed Sensor Low Output >> Test Description
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Test Description

The numbers below refer to the step numbers in the diagnostic procedures.

  1. 3 -  This step tests the ability of the VSS to produce an AC voltage. This step also verifies the integrity of the wiring to the PCM.
  2. 4 -  This step test the VSS circuit for correct resistance.

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