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Section 216 (Engine Control System)
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Pcm Inspection
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Inspection Using An Oscilloscope (Reference)
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SGC signal
SGC signal
WARNING:
This page is about a different car, the 2004 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: SGC Signal Inspection By Using Oscilloscope (Reference)
Courtesy of MAZDA MOTORS CORP.
PCM terminal: 85(+)-86(-)
Oscilloscope setting: 0.5V/DIV (Y), 10ms/DIV (X), AC range
Vehicle condition: idle after warm up