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MX-5 Miata Club
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Repair and Diagnosis
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Engine Performance
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Engine Control Systems
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Pcm Inspection
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Inspection Using An Oscilloscope (Reference)
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Cooling Fan Control Signal
Cooling Fan Control Signal
Courtesy of MAZDA MOTORS CORP.
PCM terminals
2I (+)-body ground (-)
Oscilloscope setting
5 V/DIV (Y), 20 ms/DIV (X), DC range
Vehicle condition
Idle (after warm up and no load)
Courtesy of MAZDA MOTORS CORP.