W/Harness Inspection

U0100 Lost Communication With ECM/PCM \'A\'

Inspection/Repair - W/Harness Inspection

Terminal and Connector Inspection

1. 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.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?






Signal Circuit Inspection

CAN Circuit Check
1. Ignition "OFF".
2. Measure resistance between CAN high terminal and CAN low terminal of PCM/TCM harness connector.

Specification :Approx. 60 Ohms ± 10 Ohms








3. Is the measured resistance within specifications?





CAN Registor Check
1. Ignition "OFF".
2. Disconnect "PCM/TCM" connector.
3. Measure resistance between CAN high terminal and CAN low terminal of PCM/TCM harness connector.

Specification :Approx. 120 Ohms ± 10 Ohms








4. Is the measured resistance within specifications?