Hydraulic variable valve timing control signal

Fig 1: Hydraulic Variable Valve Timing Control Signal Wave Pattern

Courtesy of MAZDA MOTORS CORP.

PCM terminals 

• 1AN(+)-body ground(-)

Oscilloscope setting 

• 5 V/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition 

• Racing (Engine speed: 2, 000 rpm)