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: Vehicle Speed Signal (MTX) Pattern

Courtesy of MAZDA MOTORS CORP.