Main Heated Oxygen Sensor

INSPECTION
1. Inspect heater resistance of main heated oxygen sensor.





- Using an ohmmeter, measure the resistance between the terminals +B and HT.

Resistance: 5.1 - 6.3 Ohms at 20°C (68°F)

- If the resistance is not as specified. replace the main heated oxygen sensor.
2. Inspection of feedback voltage (VF1).
- Warm up the engine.
- Connect the voltmeter to the data link connector 1 terminals VF1 and E1 and follow the procedure.












HINT: Use SST when connecting between terminals TE1 and E1 of the data link connector 1 (SST 09843-18020).