Oxygen Sensor: Service and Repair

Inspection

1. Check signal waveform of HO2S using a scantool.

Specification:Refer to "Waveform"

2. Turn the ignition switch OFF.
3. Disconnect the HO2S connector.
4. Measure resistance between the HO2S heater terminals 3 and 4.
5. Check that the resistance is within the specification.

Specification:Refer to Specification Section.