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. |
IG Key "OFF".
Connect PCM, 4WD ECU, TCM, ABS connector.
Measure registance between terminal 3 and 11 of diagnostic connector.
Specification : About 60 Ω
Is the measured resistance 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. ▶ Go to next procedure. |
| ▶ If the measured value is out of specification, repair or replace 120Ω CAN register(Inside of PCM and Cluster) and then, go to "Verification of Vehicle Repair" procedure. ▶ If the measured value is lower than 10Ω, repair or replace CAN High and CAN Low are short each other. 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. ▶ Go to next procedure. |
IG Key "OFF".
Disconnect PCM connector and Cluster connector.
Measure resistance between terminal CAN Low and CAN High of ECM.
Specification : About 120 Ω
Is the measured value within specification ?
| ▶ Go to next procedure. |
| ▶ If the measured value is out of specification, repair or replace 120Ω CAN register(Inside of PCM and Cluster) and then, go to "Verification of Vehicle Repair" procedure. ▶ If the measured value is lower than 10Ω, repair or replace CAN High and CAN Low are short each other. 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".
Disconnect PCM, 4WD ECU, TCM and ABS connector.
IG KEY OFF
Measure voltage between CAN high terminal(
Is the measured value within specification ?
| ▶ Check PCM, 4WD ECU, TCM and ABS 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. |
