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MPV ES
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Pcm Inspection
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Inspection Using An Oscilloscope (Reference)
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Engine speed signal (output)
Engine speed signal (output)
PCM terminal: 21 (+)-100 (-)
Oscilloscope setting: 2V/DIV (Y), 5ms/DIV (X), DC range
Vehicle condition: idle after warm up
Fig 1: Identifying Oscilloscope Graph Engine Speed Signal (Output)
Courtesy of MAZDA MOTORS CORP.