Test Description

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

The numbers below refer to the step numbers on the diagnostic table

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.
4. This step tests the VSS circuit for correct resistance.

Fig 1: DTC P0503 Diagnosis (Steps 1-6)

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Fig 2: DTC P0503 Diagnosis (Steps 7-15)

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Fig 3: DTC P0503 Diagnosis (Steps 16-17)

Courtesy of GENERAL MOTORS CORP.