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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 P17ED: Engine Clutch System EOL Fault >> System Inspection

System Inspection

  1. This failure occurs in any of the following cases.
    • When the HPCU has been replaced
    • When the engine clutch/motor resolver learning has not bee carried out normally (it has failed while learning)
    • When the key is turned off and on after the engine clutch final test line learning of the GDS and the initialization of diagnosis information are carried out
  2. 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.

    * If the engine clutch cover and disk are not replaced, it is not necessary to carry out (1) stabilization of engine clutch hardware transfer torque.

    * 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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