Fuel injection (#1, #2, #3, #4) control

Fig 1: Fuel Injection (1, 2, 3, 4) Control Voltage Signal Waveform

Courtesy of MAZDA MOTORS CORP.

PCM terminals 

• Fuel Injection No. 1: 2BB(+) - body ground(-)
• Fuel Injection No. 2: 2BC(+) - body ground(-)
• Fuel Injection No. 3: 2BD(+) - body ground(-)
• Fuel Injection No. 4: 2AZ(+) - body ground(-)

  Oscilloscope setting 

• 10 V/DIV (Y), 20 ms/DIV (X), DC range

  Vehicle condition 

• idle (after warm up)