Purge control signal

PCM terminals 

• 2AN (+)-Negative battery terminal (-)

Oscilloscope setting 

• 2 V/DIV (Y), 0.1 s/DIV (X), DC range

Vehicle condition 

• Idle after warm-up
  Fig 1: Inspection Graph Of Purge Control Signal Using Oscilloscope

  Courtesy of MAZDA MOTORS CORP.