Fuel injection control signal

Fig 1: Fuel Injection Control Signal Waveform

PCM terminals 

• Fuel injector No.1: 2A (+)-Negative battery terminal (-)
• Fuel injector No.2: 2B (+)-Negative battery terminal (-)
• Fuel injector No.3: 2C (+)-Negative battery terminal (-)
• Fuel injector No.4: 2H (+)-Negative battery terminal (-)

  Oscilloscope setting 

• 5 V/DIV (Y), 10 ms/DIV (X), DC range

  Vehicle condition 

• idle (after warm up)