W/Harness Inspection

HEV Control System
U1001 High Speed CAN Communication Bus (H-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?






H-CAN register and communication line inspection

H-CAN register and communication line inspection 1
1. IG KEY OFF.
2. Connect PCM, BMS connector.
3. Measure registance between terminal H-CAN High and H-CAN Low of PCM connector.

Specification :About 60 Ohms




4. Is the measured registance within specification ?





H-CAN register and communication line inspection 2
1. IG KEY OFF
2. Disconnect PCM, BMS connector.
3. Measure resistance between terminal H-CAN Low and H-CAN High of PCM.
4. Measure resistance between terminal H-CAN Low and H-CAN High of BMS.

Specification :About 120 Ohms




5. Is the measured value within specification ?






H-CAN communcation line inspection

Check short to ground in H-CAN communication line.
1. IG KEY OFF
2. Disconnect PCM, BMS connector.
3. Measure resistance between H-CAN High terminal of PCM connector and chassis ground.
4. Measure resistance between H-CAN Low terminal of PCM connector and chassis ground.
Check short to battery in H-CAN communication line.
1. IG KEY OFF
2. Disconnect PCM, BMS connector.
3. IG KEY ON
4. Measure voltage between H-CAN High terminal(# 3) of PCM connector and chassis ground.
5. Measure voltage between H-CAN Low terminal(#11) of PCM connector and chassis ground.

Specification :Approx. 0V




6. Is the measured value within specification ?