July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Circuit Open/Short Inspection (Sensor): Notes

Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION .)
Inspect the following wiring harnesses for open or short circuit. (Continuity check)

Fig 1: Heated Oxygen Sensor (HO2S) Harness Side Connector Identification

Courtesy of MAZDA MOTORS CORP.