Open Circuit

HO2S (RF) terminal C (harness-side) and ignition switch
HO2S (RF) terminal D (harness-side) and PCM terminal 93 (harness-side)
HO2S (LF) terminal C (harness-side) and ignition switch
HO2S (LF) terminal D (harness-side) and PCM terminal 94 (harness-side)
HO2S (RR) terminal C (harness-side) and ignition switch
HO2S (RR) terminal D (harness-side) and PCM terminal 95 (harness-side)
HO2S (LR) terminal C (harness-side) and ignition switch
HO2S (LR) terminal D (harness-side) and PCM terminal 96 (harness-side)