W/Harness Inspection

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness 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 "Signal Circuit Inspection" procedure.

Signal Circuit Inspection

1. IG "OFF" and disconnect IATS connector.
2. IG "ON" and ENG "OFF"
3. Measure voltage between terminal 4 of IATS harness connector and chassis ground.
A. Specification: Approx. 5V




4. Is the measured voltage within specification ?
YES
1) Check short to battery in harness.
2) If O.K, go to "Ground Circuit Inspection" procedure.
3) If N.G, repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
1) Repair open or short to ground in harness and go to "Verification of Vehicle Repair" procedure.

Ground Circuit inspection

1. IG "OFF" and disconnect IATS connector.
2. Measure voltage terminal 4 of IATS harness connector and chassis ground.
3. Measure voltage terminal 4 and 5 of IATS harness connector.
A. Specification: Voltage difference between measurement "A" and "B" is below 200 mV.








4. Is the measured voltage within specification ?
YES
1) Go to "Component Inspection" procedure.
NO
1) Repair contact resistance or open in harness and go to "Verification of Vehicle Repair" procedure.