Vehicle Speed Sensor

NOTE: If speedometer operates, vehicle speed sensor is okay.

Remove vehicle speed sensor. Connect AC voltmeter (5-volt scale) between vehicle speed sensor terminals. SeeFig 1 . Rotate vehicle speed sensor driven gear gear by hand. If voltage pulses are detected, vehicle speed sensor is okay. If voltage pulses are not detected, replace vehicle speed sensor.

Fig 1: Checking Vehicle Speed Sensor

Courtesy of MAZDA MOTORS CORP.