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

Check for Open in Control Harness
1. Ignition "OFF"
2. Disconnect HO2S and ECM connectors
3. Measure resistance between terminals 6 of the HO2S heater harness connector and 93 of the ECM harness connector
A. Specification : Approx. 0 Ohm




4. Is resistance within the specification?
YES
1) Go to next step as below
NO
1) Repair as necessary and go to "Verification of Vehicle Repair" procedure
Check for Short to Battery in Control Circuit
1. Reconnect the ECM connector
2. Ignition "ON" & Engine "OFF"
3. Measure voltage between terminal 3 of the HO2S heater harness connector and chassis ground
A. Specification : Approx 0V




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