626 ES V6-2.5L DOHC (1997)
Oxygen Sensor: Testing and Inspection
Component Testing
With Scan Tool
Using The Engine Signal Monitor
1. Remove the Powertrain Control Module (PCM).
SSTs Engine Signal Monitor
2. Connect the Special Service Tool (SST) to the PCM.
3. Warm up the engine to normal operating temperature.
4. Measure the voltage at PCM terminals 3D, 3H, 3I and 3M.
Heated Oxygen Sensor Voltage Specifications
5. If not as specified, inspect the 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.)
New Generation Star (NGS) Tester, Connected to DLC-2
Using The NGS
1. Connect the SSTs to the data link connector 2.
