3.
Has a problem been found?
 | ▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure. |
 | ▶ Go to "CAN communication circuit 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 go to "Verification of Vehicle Repair" procedure. |
| ▶ Go to "CAN communication circuit inspection" procedure. |
Ignition "OFF"
Disconnect 4WD ECU connector and ESP connector.
Measure the resistance between CAN-HIGH terminal of 4WD ECU harness connector and CAN-HIGH terminal of ESP harness connector.
Measure the resistance between CAN-LOW terminal of 4WD ECU harness connector and CAN-LOW terminal of ESP harness connector.
Specification : below 1Ω
Is the measured registance within specification ?
| ▶ Check 4WD ECU connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure. |
| ▶ If the measured value is ∞ Ω, repair or replace the open in CAN High /CAN Low circuit. And then, go to 'Verification of Vehicle Repair" procedure. |
IG key "OFF".
Measure resistnace between CAN high terminal (
Is the measured value within specification ?
| ▶ Check PCM, 4WD ECU, TCM and ESP ECM connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure. |
| ▶ Check short to battery in communication line. And then, go to 'Verification of Vehicle Repair" procedure. ▶ Check short to ground in communication line. And then, go to 'Verification of Vehicle Repair" procedure. |
