W/Harness Inspection

Terminal and Connector inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?






Control Circuit Inspection

1. Ignition "OFF".
2. Disconnect HO2S connector.
3. Ignition "ON", Engine "OFF".
4. Measure voltage between VG terminal of the sensor harness connector and chassis ground.

Specification : Approx. 2 - 3V


5. Measure resistance between VG terminal and other terminals of the HO2S harness connector.

Specification : Infinite Ohms









6. Is HO2S display near the specification?