Mazda CX-9 Grand Touring 2009 Manual page 855

Fig. 34: Identifying PCM Wiring Harness-Side Connector And Rear HO2S Connector
Courtesy of MAZDA MOTORS CORP.
Open circuit
If there is no continuity, the circuit is open. Repair or replace the harness.
HO2S (RH) terminal A and PCM terminal 2AS
HO2S (RH) terminal B and PCM terminal 2BG
HO2S (RH) terminal C and main relay No.2 terminal D
HO2S (RH) terminal D and PCM terminal 2AL
HO2S (LH) terminal A and PCM terminal 2AO
HO2S (LH) terminal B and PCM terminal 2BC
HO2S (LH) terminal C and main relay No.2 terminal D
HO2S (LH) terminal D and PCM terminal 2AL
Short circuit
2008 Mazda CX-9 Grand Touring
2008 ENGINE Control System (MZI-3.7) - Mazda CX-9