Open circuit
- If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness.
- Front HO2S terminal A and PCM terminal 2AD
- Front HO2S terminal B and PCM terminal 2Z
- Front HO2S terminal C and PCM terminal 2BG
- Front HO2S terminal D and ignition switch
- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
- Middle HO2S terminal A and PCM terminal 2R
- Middle HO2S terminal B and PCM terminal 1BG
- Rear HO2S terminal A and PCM terminal 2Q
- Rear HO2S terminal B and PCM terminal 1BC
- 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 2BF
- Rear HO2S terminal C and ignition switch
- Rear HO2S terminal D and PCM terminal 2BE
Courtesy of MAZDA MOTORS CORP.