3.
Has a problem been found?
 | ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure. |
 | ▶ Go to "Charging System Inspection" procedure. |
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.
Thoroughly check all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
Has a problem been found?
| ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure. |
| ▶ Go to "Charging System Inspection" procedure. |
Ignition "OFF"
Disconnect 4WD ECU connector.
ENG "ON".
Measure voltage between terminal 4WD ECU harness connector and chassis ground.
Specification : less than 16 [V]
Is the measured voltage within specifications?
| ▶ Go to "Ground Circuit Inspection" procedure. |
| ▶ Thoroughly check all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage. ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure. |
IG Key "OFF".
Disconnect 4WD ECU connector.
Measure resistance between terminal 4WD ECU harness connector and chassis ground.
Specification : Approx. 0 Ω
Is the measured resistance within specification ?
| ▶ Substitute with a known-good 4WD ECU and check for proper operation. If the problem is corrected,replace 4WD ECU and then go to "Verification of Vehicle Repair" procedure. |
| ▶ Check for open or contact resistance in ground harness. ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure. |
