Inspection using an oscilloscope (reference)

WARNING: This page is about a different car, the 2021 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

Courtesy of MAZDA MOTORS CORP.

Terminal: D, F(+) ↔ ground (-)
Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range