W/Harness Inspection

4WD Control
P1782 Ignition Voltage Fault - Inspection/Repair:_: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?






Charging System Inspection

1. Engine "ON"
2. headight and heatwire "ON".
3. Measure voltage between terminal (+) and (-) of battery while maintaining ENG RPM 2,500RPM over 2 minutes.

Specification :Less than 14.5 [V]
More than 10 [V]




4. Is the measured voltage within specifications?






Power Circuit Inspection

1. IG key "OFF".
2. Disconnect 4WD ECM connector.
3. IG key "ON".
4. Measure voltage between battery power terminal of 4WD ECM harness connector and chassis ground maintaining ENG. RPM at 2,500RPM(idle) over 2 minutes.

Specification :Less than 15 [V]
More than 10 [V]




5. Is the measured voltage within specifications?






Ground Circuit Inspection

1. IG key "OFF"
2. Disconnect 4WD ECM connector.
3. Measure resistance between ground terminal of 4WD ECM harness connector and chassis ground.

Specification :Approx. 1.0 Ohms




4. Is the measured resistance within specification ?