Open circuit

WARNING: This page is about a different car, the 2005 Mazda RX-8 and 2004 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness.
- Rear HO2S terminal A and PCM terminal 2Q
- Rear HO2S terminal B and PCM terminal 1U
- Rear HO2S terminal C and main relay terminal C
- Rear HO2S terminal D and PCM terminal 2A