Description
• The power (DC) of a high voltage battery converts the power of low battery (DC). (high voltage → low voltage)
• LDC and OBC are integrated in the Integrated Charge Control Unit (ICCU).
Troubleshooting
How to remedy when the fault code occurs
| Item | Major Fault Code | Suspected Cause | Inspection |
| LDC inspection | • Output overvoltage fault | • LDC | • Replace the Integrated Charge Control Unit (ICCU) when the same problem occurs after the vehicle restarts |
| • LDC Voltage Control fault | |||
|
• Sensors fault - Current sensor offset calibration abnormality - Temperature sensor open circuit/short circuit/performance abnormality fault - Input / Output voltage sensor fault |
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| • PWM output fault | |||
| Vehicle inspection | • Output terminal path fault | • Wiring and connectors between the LDC output terminal and the high voltage junction box | • Check the LDC output circuit and cable connection condition |
| Coolant system fault |
• Coolant system • Low coolant • Electric Water Pump (EWP) |
• Inspect the Electric Water Pump (EWP) | |
| • Input over current fault |
• Auxiliary 12 V Battery discharged • 12 V electric component overload |
• Check the auxiliary 12 V battery discharge condition • Check abnormal operation or short circuit conditions of 12 V electric components |
Replacement
• When working on high voltage system, the work should be performed by technicians who have completed the relevant training. A lack of understanding of the high voltage system can lead to serious accidents due to electric shock or electric leakage.
• When working on high voltage system or related components, make sure that you are familiar and comply with the "Safety Precautions, Cautions and Warnings." If you do not comply with the instructions, serious accidents due to electric shock or leakage may occur.
• When working on high voltage system, make sure to check the Personal Protective Equipment (PPE) and high voltage shut-off procedures.
1.Replace the Integrated Charge Control Unit (ICCU).(Refer to High Voltage Charging System - "Integrated Charger and Converter Unit (ICCU)")
