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Pattern 2

WARNING: This page is about a different car, the 2010 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

Terminal: 2E (+) <=> body ground (-)
Oscilloscope setting: 5 V/DIV (Y), 200 μs/DIV (X), DC range

Fig 1: Oscilloscope Waveform Pulse Graph - Pattern 2
Courtesy of MAZDA MOTORS CORP.