W/Harness Inspection

Ground Circuit Inspection

1. Ignition "OFF"
2. Disconnect HO2S connectors
3. Measure resistance between ground terminal of HO2S (B1S2) harness connector and chassis ground

Specification : Approx. 0 Ohm





4. Is resistance within the specification?






Signal Circuit Inspection

1. Ignition "ON" & Engine "OFF"
2. Measure voltage between signal terminal of HO2S (B1S2) harness connector and chassis ground

Specification : Approx. 0.4-0.5V





3. Is voltage within the specification?






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?