Vehicle speed signal (MTX)

PCM terminals 

1J (+)-1N (-) 

Oscilloscope setting 

• 1 V/DIV (Y), 10 ms/DIV (X), DC range

Vehicle condition 

• Vehicle speed is 10 km/h {6.2 mph}.
  Fig 1: Inspection Graph Of Vehicle Speed Signal (MTX) Using Oscilloscope

  Courtesy of MAZDA MOTORS CORP.