Wave pattern (reference)

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G14579931

Courtesy of MAZDA MOTORS CORP.

PCM terminals

1AC (+)-body ground (-)

Oscilloscope setting

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

Vehicle condition

Idle (after warm up)

G14579932

Courtesy of MAZDA MOTORS CORP.

PCM terminals

1AC (+)-body ground (-)

Oscilloscope setting

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

Vehicle condition

Racing (Engine speed: 2, 000 rpm)