W/Harness Inspection

Pumping Current Circuit Inspection

1. Ignition "OFF"
2. Disconnect HO2S and ECM connectors.
3. Measure resistance between terminals 1 of the sensor harness connector and 43 of the ECM harness connector
A. Specification : Approx. 0 ohms




4. Is resistance within the specification ?
YES
1) Go to "Terminal and Connector Inspection" procedure
NO
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure

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) Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure