Wheel speed

ABS HU/CM terminal or ABS/TCS HU/CM terminal:
RF : G (+) - D (-)

RR : A (+) - B (-)

LF : l (+) - E (-)

LR : C (+) - F (-)
Oscilloscope setting: 1 V/DIV (Y), 2 ms/DIV (X)
Vehicle condition: Driving 30 km/h [18.6 mph]
NOTE:
- As vehicle speed increases, period of wave shortens.
- If malfunctioning in the sensor rotor, wave profile will warp.
  
  Fig 1: Inspecting With Using Oscilloscope (Wheel Speed)
  Courtesy of MAZDA MOTORS CORP.