W/Harness Inspection

HEV Control System
U0001 High Speed CAN Communication Bus (C-CAN) - Inspection/Repair:_:W/Harness Inspection

W/Harness Inspection




1. Perform a visual check of the Electrical systems including the harness connectors and check for corrosion and deformation.plus poor terminals fit.
2. Poor connections can be checked by monitoring signals in current data while moving and lightly pulling on the harness and connectors.
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 battery 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 ?