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Section 16 (Security And Locks)
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LF Control Unit Inspection
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Inspection Using an Oscilloscope (Reference)
Inspection Using an Oscilloscope (Reference)
WARNING:
This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
Pattern 1
Fig 1: LF Control Unit Signal Waveform
Courtesy of MAZDA MOTORS CORP.
LF control unit: H (+) ↔ body ground (-)
Oscilloscope setting: 2 V/DIV (Y), 100 ms/DIV (X), DC range