W/Harness Inspection

Engine Control
U0101 Lost Communication With TCM - Inspection/Repair:_:W/Harness Inspection

Terminal and Connection Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) 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?






Signal Circuit Inspection

Check CAN communication line Open
1. Disconnect the connectors related to the CAN communication.
2. Ignition "ON" & Engine "OFF".
3. Measure resistance between High signal terminal of PCM and TCM.
4. Measure resistance between Low signal terminal of PCM and TCM.

Specification :Approx. 0Ohms




5. Is voltage within the specification?