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
> Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
> Go to "Signal Circuit Inspection" procedure.

Signal Circuit Inspection

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




4. Is the measured voltage within specification ?
YES
1) Go to "Ground Circuit Inspection" procedure.
NO
1) If voltage is 0V, go to "Check open in harness" as follows. If it is more than 5.1V, go to "Check short to battery in harness" as follows
Check short to battery in harness
1. IG "OFF" and disconnect ECTS connector and PCM connector.
2. Measure resistance between signal and cluster terminals of ECTS harness connector.
A. Specification : Infinite




3. Is the measured resistance within specification ?
YES
1) Go to "Component Inspection" procedure.
NO
1) Repair short to battery in harness, and go to "Verification of Vehicle Repair" procedure.
Check open in harness
1. IG "OFF" and disconnect ECTS connector and PCM connector.
2. Measure resistance between signal terminal of ECTS harness connector and ECTS signal terminal of PCM harness connector.
A. Specification : Below 1 Ohm




3. Is the measured resistance within specification ?
YES
1) Go to "Ground Circuit Inspection" procedure.
NO
1) Repair open in harness, and go to "Verification of Vehicle Repair" procedure.

Ground Circuit inspection

Check open in harness
1. IG "OFF" and disconnect ECTS connector and then IG "ON".
2. Measure voltage between signal terminal of ECTS harness connector and chassis ground. (Measurement "A")
3. Measure voltage between signal and ground terminals of ECTS harness connector. (Measurement "B")
A. Specification : Voltage difference between measurement "A" and "B" is below 200 mV.








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