DTC P0500: Vehicle Speed Sensor Malfunction: Reference
WARNING: This page is about a different car, the 2002 Suzuki Esteem. However, it is still accessible from the selected car via links, so may be relevant.
To test VSS with an oscilloscope, backprobing at ECM connect oscilloscope between ECM harness connector E92 terminal No. 27 (Purple wire) and ground. See Figure . Also, test can be made connecting oscilloscope between instrument cluster harness connector G19 terminal No. 13 and ground. Compare VSS waveform, to waveform in illustration. See Fig 1 .