Millenia L V6-2.5L DOHC (1997)
Oxygen Sensor: Testing and Inspection
HEATED OXYGEN SENSOR TESTING
Using The Engine Signal Monitor
1. Remove the PCM.
2. Connect the Special Service Tools to the PCM.
3. Warm up the engine to normal operating temperature.
4. Measure the voltage at PCM terminal 31, 3M, 3D and 3H.
5. If not as specified, inspect following.
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Intake-air system
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Fuel system
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On-board diagnostic system
If these systems are OK, replace the heated oxygen sensor.
Tightening torque: 30-49 Nm (22-36 ft.lbs.)
Using Special Service Tools (NGS)
1. Connect the Special Service Tools to the data link connector 2.
2. Select the PID/DATA MONITOR AND RECORD function of NGS.
3. Select "FHO2S R", FHO2S L", "MHO2S" and "RHO2S" on the NGS display.