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Mazda
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2002
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MX-5 Miata LS L4-1.8L DOHC
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Repair and Diagnosis
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Powertrain Management
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Ignition System
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Testing and Inspection
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Oscilloscope Patterns and Waveforms
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Engine Speed Signal
Engine Speed Signal
Inspection Using An Oscilloscope (Reference)
Engine speed signal
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PCM terminal: 3O (+) <-> 4A (-)
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Oscilloscope setting:
2.0 V
/DIV (Y),
20 ms
/DIV (X), DC range
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Vehicle condition: Idling