Wheel Speed

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

RR: A (+) - B (-)

LF: I (+) - E (-)

LR: C (+) - F (-)
Oscilloscope setting: 1 V/DIV (Y), 2 ms/DIV (X)
Vehicle condition: Driving 30 km/h [18.6 mph]

Fig 1: Inspecting Wheel Speed Using Oscilloscope
Courtesy of MAZDA MOTORS CORP.
NOTE:
- As Vehicle speed increases, period of wave shortens.
- If malfunctioning in the sensor rotor, wave profile will warp.