W/Harness Inspection

HEV Motor System
U0001 High Speed CAN Communication Bus off (C-CAN) - 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?






CAN register and communication line inspection

CAN register and communication line inspection 1
1. Ignition OFF.
2. Connect all module connectors in proper locations.
3. Measure registance between terminal 3 and 11 of diagnostic connector.

Specification :About 60 Ohms








4. Is the measured registance within specification ?





CAN register and communication line inspection 2
1. Ignition OFF.
2. Disconnect PCM and BMS connectors.
3. Measure resistance between terminal CAN Low and CAN High of ECM and BMS Modules.

Specification :About 120 Ohms








4. Is the measured value within specification ?






CAN communcation line inspection

Check short to ground in CAN communication line.
1. Ignition OFF
2. Disconnect all related module connectors.
3. Ignition ON
4. Measure voltage between CAN high terminal (# 3) of diagnostic connector and chassis ground.
5. Measure voltage between CAN low terminal (#11) of diagnostic connector and chassis ground.

Specification :approx. 0V

Check short to ground in CAN communication line
1. Ignition OFF.
2. Disconnect all related module connectors.
3. Measure resistance between CAN high terminal (# 3) of diagnostic connector and chassis ground.
4. Measure resistance between CAN low terminal (# 11) of diagnostic connector and chassis ground.

Specification :Infinity Ohms








5. Is the measured value within specification ?