W/Harness Inspection

HEV Control System
U1003 Lost Communication with TCM (H-CAN) - Inspection/Repair:_:W/Harness Inspection

W/Harness 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?






H-CAN communication circuit inspection

H-CAN communication line inspection
1. IG KEY OFF.
2. Disconnect HCU connector and PCM connector.
3. Measure the resistance between H-CAN-HIGH terminal of HCU harness connector and H-CAN-HIGH terminal of PCM harness connector.
4. Measure the resistance between H-CAN-LOW terminal of HCU harness connector and H-CAN-LOW terminal of PCM harness connector.

Specification :Below 1Ohms




5. Is the measured registance within specification ?