W/Harness Inspection

Terminal and Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminal condition. 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?






Alternator Output Voltage Inspection

Charging System Check
1. Ignition "ON" & Engine "ON".
2. Maintain ENG RPM 2,500 RPM over 2 minutes.
3. Measure voltage between the battery terminal (+) and the battery terminal (-).

Specification : Above. 9±0.5V





4. Is the measured value within specifications?






Power Circuit Inspection

Open or Short Check
1. Ignition "ON" & Engine "OFF".
2. Measure voltage between the battery terminal (+) and power terminal of the HECU harness connector.

Specification : Approx. below 0.2V





3. Is the measured value within specifications?






Ground Circuit Inspection

Open or Short Check
1. Ignition "OFF" & Engine "OFF".
2. Disconnect HECU connector.
3. Measure resistance between ground terminal of the HECU harness connector and chassis ground.

Specification : Approx. below 1 Ohm





4. Is the measured value within specifications?