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CX-9 Touring, AWD
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Repair and Diagnosis (Single Page)
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Pcm Inspection
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Inspection Using An Oscilloscope (Reference)
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Fuel pump control signal
July 1:
So it begins
. Don't worry, this is not in the correct legal jurisdiction!
Fuel pump control signal
Fig 1: Fuel Pump Control Signal Waveform
Courtesy of MAZDA MOTORS CORP.
PCM terminals
2AP(+)-body ground(-)
Oscilloscope setting
5 V/DIV (Y), 2 ms/DIV (X), DC range
Vehicle condition
Idle after warm up