Vehicle Speed Sensor Test

Turn ignition off. Remove instrument cluster. Connect voltmeter between terminals "U" and "N" of speed sensor. See Fig 1 . Ensure intermittent voltage is present while slowly rotating speedometer cable. Check for 4 pulses per shaft rotation. If 4 pulses are not present, replace speed sensor.

Fig 1: Identifying Speed Sensor Connector Terminals

Courtesy of MAZDA MOTORS CORP.