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Mazda
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2007
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3 i, 2.0 F, Standard
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Repair and Diagnosis
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Engine Performance
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Engine Control Systems
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Engine Control System (LF, L3)
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Pcm Inspection
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Inspection Using An Oscilloscope (Reference)
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Cooling fan control signals
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Vehicle condition
Vehicle condition
Idle after warm up (engine speed approx. 700 rpm, A/C ON)
Fig 1: Waveform Graph (Cooling Fan Control Signals)
Courtesy of MAZDA MOTORS CORP.