W/Harness Inspection

4WD Control
P1780 Battery Voltage High - 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]




4. Is the measured voltage within specifications?






Power Circuit Inspection

Open or Short Check
1. Ignition "OFF"
2. Disconnect 4WD ECM connector.
3. Engine "ON", headight and heatwire "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 :More than 10 [V]




5. Is the measured voltage within specifications?