Sensor

Using Special Service Tool Engine Signal Monitor
1. Warm up the engine to normal operating temperature.

2. Connect the Special Service Tools Engine Signal Monitor to the PCM.
3. Measure the PCM terminal 3C and 3D voltages.

4. If not as specified, inspect the following.
a. Harness and connector between heated oxygen sensor and PCM
b. On-board diagnostic system
c. System inspection
- Intake manifold vacuum
- Fuel line pressure

5. If all the systems are OK, replace the heated oxygen sensor.

Using Special Service Tool NGS

Special Service Tool New Generation Star Tester Connected to Data Link Connector 2:

1. Connect the Special Service Tools New Generation Star (NGS) tester to the data link connector 2.

2. Select the PID/DATA MONITOR AND RECORD function.
3. Select "FHO2S" and "RHO2S" on the NGS display. The NGS measures and shows the voltage.