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 ?
YES
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
1) Go to "Control Circuit Inspection" procedure

Control Circuit Inspection

1. Ignition "OFF"
2. Disconnect HO2S and ECM connector
3. Ignition "ON" & Engine "OFF"
4. Measure resistance between terminal 1 of the sensor harness connector and chassis ground
5. Measure resistance between terminal 2 of the sensor harness connector and chassis ground
6. Measure resistance between terminal 3 of the sensor harness connector and chassis ground
7. Measure resistance between terminal 4 of the sensor harness connector and chassis ground
A. Specification : Infinite




8. Is HO2S display near the specification ?
YES
1) Go to "Component Inspection" procedure
NO
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure