Mazdaspeed6 L4-2.3L Turbo (2006)
Oxygen Sensor: Oscilloscope Patterns and Waveforms
HO2S (front) heater control signal
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PCM terminals: 4AD(+)-Body ground(-)
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Oscilloscope setting: 2.5 V/DIV (Y), 20 minutes/DIV (X), DC range
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Vehicle condition: Idle after engine start (no load, P/S off, A/C off)