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.
- HO2S (RF) terminal A and PCM terminal 18
- HO2S (RF) terminal B and PCM terminal 20
- HO2S (LF) terminal A and PCM terminal 19
- HO2S (LF) terminal B and PCM terminal 20
- HO2S (RR) terminal A and PCM terminal 44
- HO2S (RR) terminal B and PCM terminal 20
- HO2S (LR) terminal A and PCM terminal 45
- HO2S (LR) terminal B and PCM terminal 20

Fig 1: Identifying Harness Side Connector

Courtesy of MAZDA MOTORS CORP.