IGT1, IGT2, IGT3, IGT4 control

Fig 1: IGT1, IGT2, IGT3, IGT4 Control Voltage Signal Waveform

Courtesy of MAZDA MOTORS CORP.

PCM terminals 

• IGT1(ignition coil No. 1): 2G(+) - body ground(-)
• IGT2(ignition coil No. 2): 2K(+) - body ground(-)
• IGT3(ignition coil No. 3): 2L(+) - body ground(-)
• IGT4(ignition coil No. 4): 2H(+) - body ground(-)

  Oscilloscope setting 

• 1 V/DIV (Y), 50 ms/DIV (X), DC range

  Vehicle condition 

• idle (after warm up)