Electric variable valve timing driver (diagnostic) signal

PCM terminals 

• 1AE(+)-body ground(-)

Oscilloscope setting 

• 2 V/DIV (Y), 100 ms/DIV (X), DC range

Vehicle condition 

• Idle (after warm up)
  Fig 1: Electric Variable Valve Timing Driver (Diagnostic) Signal Waveform

  Courtesy of MAZDA MOTORS CORP.