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Middle/rear HO2S circuit open/short inspection (heater): Notes

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Middle/Rear HO2S & PCM Connector Terminals
G03644187Courtesy of MAZDA MOTORS CORP.
  1. Disconnect the PCM connector.
  2. Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)
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