Fuel injection control

Fig 1: Fuel Injection Control Waveform Graph

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), 25 ms/DIV (X), DC range

Vehicle condition 

• Idle after warm up