Open circuit

If there is no continuity, the circuit is open. Repair or replace the harness.
- GND circuit (HO2S connector D and PCM connector terminal 3J through common connector (Front).)
- Power circuit (HO2S connector terminal C and ignition switch (IG1) circuit through common connector (Front).)
- GND circuit (HO2S connector terminal D and PCM connector terminal 3P (Rear).)
- Power circuit (HO2S connector terminal C and ignition switch (IG1) circuit through common connector (Rear).)
Fig 1: Identifying HO2S Harness Side Connector
Courtesy of MAZDA MOTORS CORP.