Heated Oxygen Sensor (HO2S) Inspection

1. Connect the SSTs to the data link connector-2.




2. Select the PID/DATA MONITOR AND RECORD function of NGS.
3. Select "FHO2S R", "RHO2S R", FHO2S L' and "RHO2S L" on the NGS display. NGS measures and shows the voltage.




Specification

4. If not as specified, inspect following.
- Intake-air system
- Fuel system
- On-Board diagnostic system
If these systems are okay, replace the heated oxygen sensor.

Tightening torque
30 - 49 Nm {3.0 - 5.0 kg.m, 22 - 36 ft.lb}

Heater
1. Disconnect the heated oxygen sensor connector.







2. Measure the resistance between heated oxygen sensor (front) terminals B and C or between heated oxygen sensor (rear) terminals C and D by using an ohmmeter.

Specification
Approx. 6 Ohms [2O° C {68° F}]

3. If not as specified, replace the heated oxygen sensor.

Tightening torque
30 - 49 Nm {3.0 - 5.0 kg.m, 22 - 36 ft.lb}