CX-9 AWD V6-3.7L (2008)
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If it is not within the specification, replace the HO2S.
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If the monitor item status/specification (reference) is not within the specification, even though the resistance is within the specification,
perform the "Circuit Open/Short Inspection".
HO2S heater resistance
3-30 ohms
Circuit Open/Short Inspection
1. Disconnect the PCM connector.
2. Inspect the following wiring harness for open or short (continuity check).
Open circuit
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If there is no continuity, the circuit is open. Repair or replace the harness.
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HO2S (RH) terminal A and PCM terminal 2AS
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HO2S (RH) terminal B and PCM terminal 2BG
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HO2S (RH) terminal C and main relay No.2 terminal D
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HO2S (RH) terminal D and PCM terminal 2AL
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HO2S (LH) terminal A and PCM terminal 2AO
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HO2S (LH) terminal B and PCM terminal 2BC
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HO2S (LH) terminal C and main relay No.2 terminal D
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HO2S (LH) terminal D and PCM terminal 2AL
Short circuit
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If there is continuity, the circuit is shorted. Repair or replace the harness.
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HO2S (RH) terminal A and power supply
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HO2S (RH) terminal A and body ground
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HO2S (RH) terminal B and power supply
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HO2S (RH) terminal B and body ground
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HO2S (RH) terminal C and body ground
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HO2S (RH) terminal D and power supply
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HO2S (LH) terminal A and power supply
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HO2S (LH) terminal A and body ground
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HO2S (LH) terminal B and power supply
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HO2S (LH) terminal B and body ground