Fuel injection control (-) signal

Fig 1: Fuel Injection Control Signal Wave Form

G09785503

Courtesy of MAZDA MOTORS CORP.

PCM terminals

Fuel Injection No. 1: 1DO(+)-body ground(-)
Fuel Injection No. 2: 1DW(+)-body ground(-)
Fuel Injection No. 3: 1EA(+)-body ground(-)
Fuel Injection No. 4: 1DS(+)-body ground(-)

Oscilloscope setting

10 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition

Idle after warm up