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"
Measure resistnace between CAN high terminal (
Is the measured value within specification ?
| ▶ Check ABS , 4WD ECU, TCM and PCM 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. |
Ignition "OFF"
Disconnect 4WD ECU connector and ABS connector
Measure the resistance between CAN-HIGH terminal of 4WD ECU harness connector and CAN-HIGH terminal of ABS harness connector.
Measure the resistance between CAN-LOW terminal of 4WD ECU harness connector and CAN-LOW terminal of ABS harness connector.
Specification : below 1Ω
Is the measured resistance within specification ?
| ▶ Check ABS , 4WD ECU, TCM and PCM 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 for open/short in harness. ▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure. |
