System Inspection

Remove the undercover below the vehicle and check the connector of the engine clutch actuator (HCA) for normal connection and corrosion.
- If the connector is connected incorrectly, connect the connector correctly and check the system.
- Check the connector terminal on the HCA for corrosion.
- If the connector is connected correctly and there is no corrosion, carry out No. 2 item.
Erase DTC, request for engine clutch/motor resolver learning using the GDS, and check if the same DTC occurs.
- If the same DTC occurs, carry out No. 3 item.
- If the same DTC does not occur, check if a different DTC has occurred.
- If the engine clutch/motor resolver learning function has failed, carry out measures according to the reason for failure.
After replacing it, it is necessary to carry out (1) final test line learning of the engine clutch and initialization of the diagnosis information → (2) Air bleeding from the hydraulic line of the engine clutch → (3) Engine clutch/motor resolver learning procedure in order using the GDS.
* In case the SOC is below 35%, when the shift gear is left at P in the ignition switch "ON"/HEV Ready status, the engine will operate and the SOC will be charged.

* When carrying out air bleeding from the hydraulic line of the engine clutch after replacing the engine clutch system, the function will be carried out normally only when the temperature of the hydraulic oil (brake oil DOT 3) is at room temperature (over 20°C).

NOTE:

Method to confirm the reasons and respond when the optional function of the engine clutch fails
- If the optional function of the engine clutch fails, check HCU Error Code and LuK Error Code on the screen of the diagnostic tool and carry out inspection items.