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Fuel injection control signal

Fig 1: Fuel Injection Control Signal - Oscilloscope Graph

Courtesy of MAZDA MOTORS CORP.

PCM terminal
- No.1: 2A (+) <--> 3A (-)
- No.2: 2D (+) <--> 3A (-)
- No.3: 2G (+) <--> 3A (-)
- No.4: 2J (+) <--> 3A (-)
Oscilloscope setting: 2.0 V/DIV (Y), 20 ms/DIV (X), DC range
Vehicle condition: Idling after warm-up