Fuel injector (FP1, RP1) control

Terminal connected:
FP1: 2M (+)-Negative battery terminal

RP1: 2J (+)-Negative battery terminal
Oscilloscope setting: 5 V/DIV (Y): 10 ms/DIV (X), DC range
Measurement condition: Idling after warm-up (no load)

Fig 1: Identifying Fuel Injector (FP1, RP1) Control Graph (1 Of 2)
Courtesy of MAZDA MOTORS CORP.
Terminal connected:
FP1: 2M (+)-Negative battery terminal

RP1: 2J (+)-Negative battery terminal
Oscilloscope setting: 5 V/DIV (Y): 10 ms/DIV (X), DC range
Measurement condition: Cranking while the engine is cold. (ECT: Approx. 20 °C {68 °F})

Fig 2: Identifying Fuel Injector (FP1, RP1) Control Graph (2 Of 2)
Courtesy of MAZDA MOTORS CORP.