Component Tests and General Diagnostics

HEATED OXYGEN SENSOR (HO2S) INSPECTION




1. Connect the SST to the DLC-2.




2. Select the PID/DATA MONITOR AND RECORD function of NGS.




3. Select "FHO2S R", "FHO2S L", "RHO2S R" and "RHO2S L" on the NGS display. NGS measures and shows the voltage.
- If these systems are okay, replace the HO2S.
- If not as specified, inspect following
- Intake-air system
- Fuel system
- OBD system

Tightening torque: 29 - 49 N.m {3.0 - 5.0 kgf.m, 22 - 36 ft.lbf}

Heater




1. Disconnect the HO2S connector.
2. Measure the resistance between HO2S terminals D and C using an ohmmeter.
- If not as specified, replace the HO2S.

Specification:
6 Ohms Rear
3.3 Ohms Front

Tightening torque: 29 - 49 N.m {3.0 - 5.0 kgf.m, 22 - 36 ft.lbf}