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Vehicle Speedometer Sensor Signal

TCM terminal: 1M (+)-IV (-).
Oscilloscope setting: 4 V/DIV (Y) 1 ms/DIV (X).
Measuring condition: Vehicle speed at 40 km/h (25 MPH).

Fig 1: Inspecting Vehicle Speedometer Sensor Signal Using Oscilloscope
Courtesy of MAZDA MOTORS CORP.