Inspection Using An Oscilloscope (Reference)

WARNING: This page is about a different car, the 2018 Mazda CX-9. However, it is still accessible from the selected car via links, so may be relevant.

Pattern 1

Fig 1: Terminal Voltage Wave Pattern

Courtesy of MAZDA MOTORS CORP.

Terminal:
- Brake fluid level signal: 2Q (+) ↔ground (-)
- Washer level signal: 2S (+) ↔ground (-)
Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range