Open Circuit

WARNING: This page is about a different car, the 2004 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

HO2S (RF) terminal A (harness-side) and PCM terminal 60 (harness-side)
HO2S (RF) terminal B (harness-side) and PCM terminal 91 (harness-side)
HO2S (LF) terminal A (harness-side) and PCM terminal 87 (harness-side)
HO2S (LF) terminal B (harness-side) and PCM terminal 91 (harness-side)
HO2S (RR) terminal A (harness-side) and PCM terminal 35 (harness-side)
HO2S (RR) terminal B (harness-side) and PCM terminal 91 (harness-side)
HO2S (LR) terminal A (harness-side) and PCM terminal 61 (harness-side)
HO2S (LR) terminal B (harness-side) and PCM terminal 91 (harness-side)