IGT1, IGT2, IG3, IG4 control signals

PCM terminals (California emission regulation applicable model) 

• IGT1 (No.1): 2BE(+)-1BC(-)
• IGT2 (No.2): 2BF(+)-1BB(-)
• IGT3 (No.3): 2BG(+)-1BB(-)
• IGT4 (No.4): 2BH(+)-1BC(-)

PCM terminals (except for California emission regulation applicable model) 

• IGT1 (No.1): 2BE(+)-1BG(-)
• IGT2 (No.2): 2BF(+)-1BC(-)
• IGT3 (No.3): 2BG(+)-1BC(-)
• IGT4 (No.4): 2BH(+)-1BG(-)

Oscilloscope setting 

• 10 V/DIV (Y), 25 ms/DIV (X), DC range

Vehicle condition 

• Idle after warm up (engine speed approx. 650 rpm, no load)

Fig 1: IGT1, IGT2, IG3, IG4 Control Signals Pattern

Courtesy of MAZDA MOTORS CORP.