July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Vehicle speedometer sensor signal

TCM terminal: 1M (+)-1V(-)
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
Courtesy of MAZDA MOTORS CORP.