July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Fuel injection signal

PCM terminal
- No.1: 76 (+)-100 (-)
- No.2: 50 (+)-100 (-)
- No.3: 75 (+)-100 (-)
- No.4: 49 (+)-100 (-)
- No.5: 74 (+)-100 (-)
- No.6: 48 (+)-100 (-)
Oscilloscope setting: 2V/DIV (Y), 10ms/DIV (X), DC range
Vehicle condition: idle after warm up

Fig 1: Identifying Fuel Injection Signal Waveform

G04328313

Courtesy of MAZDA MOTORS CORP.