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?






Power Circuit Inspection

Check voltage
1. IG "OFF" and disconnect the main relay.
2. IG "ON"
3. Measure the voltage between power supply terminals of main relay harness connector and chassis ground.

Specification : Approx. B+





4. Is the measured voltage within specification?






Control Circuit Inspection

Check short in harness
1. IG "OFF" and disconnect the main relay and ECM connector.
2. Measure the resistance between control terminal of main relay harness connector and classes ground.

Specification : Infinite





3. Is the measured resistance within specification?





Check open in harness
1. IG "OFF" and disconnect the main relay and ECM connector.
2. Measure the resistance between control terminal of main relay harness connector and main relay control terminal of ECM harness connector.

Specification : Approx. below 1 Ohm





3. Is the measured resistance within specification?