Optima & Magentis (Canadian)
Remove Vehicle Speed Sensor (VSS) from rear of transmission at top of transaxle. Connect 3-10 k/ohm resistor as shown in Fig 1. Connect voltmeter between terminals No. 2 and 3. Spin shaft of VSS and check for voltage pulsations. There should be 4 voltage pulsations per revolution. If there are not 4 pulsations per revolution, replace VSS.