Vehicle Speed Sensor

Remove instrument cluster. Connect ohmmeter across appropriate terminals of printed circuit connector. SeeFig 1 and Fig 2 . See VEHICLE SPEED SENSOR TERMINAL IDENTIFICATION  . Insert a screwdriver into speedometer cable receptacle and rotate receptacle. If continuity is not present 4 times per revolution, replace speedometer.

Fig 1: Checking Vehicle Speed Sensor (4-Cylinder)

Courtesy of MAZDA MOTORS CORP.

Fig 2: Checking Vehicle Speed Sensor (V6)

Courtesy of MAZDA MOTORS CORP.

Connect AC voltmeter (5-volt scale) across vehicle speed sensor connector terminals. SeeFig 1 and Fig 2 . Turn drive wheels by hand (if necessary, remove vehicle speed sensor and turn shaft gear by hand). If voltage pulses are detected, vehicle speed sensor is okay. If voltage pulses are not detected, replace vehicle speed sensor.