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Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Testing and Diagnosis >> HCU/Low Dc-Dc Converter Diagnosis (HEV) >> DTC P17E9: Engine Clutch Actuator Motor Overload >> System Inspection

System Inspection

  1. 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.
  2. Separate the HCA from the hydraulic line (engine clutch housing) and carry out item No. 3.
  3. Erase the DTC, carry out the air bleeding work from the hydraulic line of the engine clutch using the GDS and check if the same DTC occurs.
    • If the DTC occurs immediately, replace the HCA and carry out item No. 4.
    • If the DTC does not occur, judge that there is abnormality in the hydraulic line or the engine clutch system and check the relevant problem.
    • If the engine clutch/motor resolver learning function has failed, carry out measures according to the reason for failure.
  4. 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).

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