Hydraulic variable valve timing control signal

Fig 1: Hydraulic Variable Valve Timing Control Signal Waveform

Courtesy of MAZDA MOTORS CORP.

PCM terminals 

• 1AS(+)-body ground(-)

Oscilloscope setting 

• 5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition 

• Racing (Engine speed 3, 500 rpm)