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Inspection Using An Oscilloscope (Reference)
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Cooling fan control signal
July 1:
So it begins
. Don't worry, this is not in the correct legal jurisdiction!
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)