Hydraulic variable valve timing control signal

Fig 1: Hydraulic Variable Valve Timing Control Wave Pattern Signal

Courtesy of MAZDA MOTORS CORP.

PCM terminals 

• 1CO (+) -body ground (-)

Oscilloscope setting 

• 5 V/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition 

• Racing (Engine speed: 2, 000 rpm)