Generator Field Coil Signal

PCM terminal: 3M(+) <-> 4A(-)
Oscilloscope setting: 0.5 V/DIV (Y), 2.5 ms/DIV (X), DC range
Vehicle condition: Idling after warm-up (no electrical load)

Fig 1: Identifying Fuel Generator Field Coil Signal
Courtesy of MAZDA MOTORS CORP.