Circuit Open/Short Inspection: Notes

Fig 1: Identifying HO2S Sensor Connector Terminals

Courtesy of MAZDA MOTORS CORP.

1. Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .)
2. Disconnect the HO2S connector
3. Disconnect the PCM connector.
4. Inspect the following wiring harness for open or short (continuity check).