Open circuit

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.

If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
- Middle HO2S terminal C and ignition switch
- Middle HO2S terminal D and PCM terminal 58
- Rear HO2S terminal C and ignition switch
- Rear HO2S terminal D and PCM terminal 57