Generator field coil control signal

PCM terminals 

2AQ(+)-2AA(-) 

Oscilloscope setting 

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

Vehicle condition 

• Idle after warm up (engine speed approx. 650 rpm, no load)
  Fig 1: Inspection Graph Of Generator Field Coil Control Signal Using Oscilloscope

  Courtesy of MAZDA MOTORS CORP.