HO2S signal (front, RH/LH)

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: HO2S Signal (Front, RH/LH) Inspection By Using Oscilloscope (Reference)

Courtesy of MAZDA MOTORS CORP.

PCM terminal: 60, 87(+)-91(-)
Oscilloscope setting: 0.2V/DIV (Y), 200ms/DIV (X), DC range
Vehicle condition: idle after warm up