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IGT1, IGT2, IGT3, IGT4 control

Fig 1: IGT1, IGT2, IGT3 And IGT4 Control Output Voltage Signal Graph

Courtesy of MAZDA MOTORS CORP.

PCM terminals

IGT1 (ignition coil No. 1): 1AG(+)-body ground(-)
IGT2 (ignition coil No. 2): 1AE(+)-body ground(-)
IGT3 (ignition coil No. 3): 1AF(+)-body ground(-)
IGT4 (ignition coil No. 4): 1AD(+)-body ground(-)

Oscilloscope setting

2 V/DIV (Y), 200 ms/DIV (X), DC range

Vehicle condition

Idle after warm up