Vehicle Speed Sensor
WARNING: This page is about a different car, the 2002 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
Remove vehicle speed sensor. Connect voltmeter (5-volt scale) between vehicle speed sensor terminals. See Fig 1 . Rotate vehicle speed sensor driven gear by hand. If voltage pulses are detected, vehicle speed sensor is okay at this time. If voltage pulses are not detected, replace vehicle speed sensor.