Monitor DTC Status
- Ignition ON (SSB LED "BLUE") & Vehicle "STOP".
- Connect GDS and select "DTC Analysis" mode.
- Click "DTC Status" on the menu bar to view DTC information.
- Confirm that the "DTC Readiness Flag" indicates "COMPLETED". If not, drive the vehicle within conditions noted in Freeze Frame Data or Enable Conditions.
- Read the "DTC Status" parameter.
- Is parameter displayed "Present fault"?
YES
- It may be a failure history occurring secondarily due to unstable status and jumping of the discharged vehicle caused by poor connection of the wire harness and connector of HPCU/auxiliary battery and the deterioration of auxiliary battery.
→ Check the connection status of the wire harness and the connector, charge the auxiliary battery, and carry out the "VERIFICATION OF VEHICLE REPAIR " procedure.
- If there is none of the above causes for the occurrence of the secondary failure, replace with a normal LDC. If the operation is normal, replace the LDC and carry out the "VERIFICATION OF VEHICLE REPAIR " procedure.
* After replacing the LDC(HPCU), the initialization of the motor resolver and the engine clutch correction should be carried out using the diagnostic tool, and the electric water pump (EWP) should be operated to refill and circulate the coolant.
NO
- If it is history code, Fault is intermittent caused by poor contact in the sensor's and/or Control module's connector or was repaired and Control module's memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of Vehicle Repair " procedure.
CAUTION: Perform following items when HPCU is replaced or reassembled.
Carry out "HCU/LDC" system → "Optional function" → "Engine clutch/motor resolver learning".
Refill the coolant and circulate the coolant by carrying out "Actuation" → "Electronic Water Pump (EWP)".
Non-compliance with the following instructions can induce death or injury caused by electric shock.
Carefully read and follow service information instructions.
Wear insulated gloves, safety glasses and use insulated tools for your safety.
Turn the ignition switch off and Disconnect ground cable of auxiliary battery and Remove the safety plug.
Wait for more than 5 minutes so that the inverter capacitor can be naturally discharged.
Check high voltage terminal on Power Relay Assembly is lower than 30V.
Perform Resolver adaptation after the HPCU or the Driver Motor or the Generator (HSG) is replaced or reinstalled.
When replaced HPCU, Perform air bleeding for HPCU with GDS. - It may be a failure history occurring secondarily due to unstable status and jumping of the discharged vehicle caused by poor connection of the wire harness and connector of HPCU/auxiliary battery and the deterioration of auxiliary battery.