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Home >> Hyundai >> 2018 >> Ioniq Plug-In Hybrid >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Active Hydraulic Boost (AHB) System (PHEV) >> Hydraulic Power Unit >> Repair Procedures >> Removal

Repair Procedures: Removal

  1. Turn ignition switch OFF and disconnect the negative (-) battery cable.
  2. Remove the wiring bracket.
    G12729490Courtesy of HYUNDAI MOTOR AMERICA
  3. Remove the brake fluid from the reservoir with a syringe.
    NOTE:
    • Do not spill brake fluid on the vehicle, it may damage the paint; if brake fluid does contact the paint, wash it off immediately with water.
    • To prevent any dust entering in the reservoir, the reservoir cap should be closed again after removing brake fluid.
  4. Loosening the flare nut (A) and then disconnect the brake tube.

    Tightening torque: 

    13.7 - 16.7 N.m (1.4 - 1.7 kgf.m, 10.1 - 12.3 lb-ft)

    G12729491Courtesy of HYUNDAI MOTOR AMERICA
    CAUTION:
    • Before removing the brake tube, high pressure in an accumulator of PSU should be reduced for safety by conducting "High pressure release mode" of GDS connected to LF HEV.
  5. Disconnect the PSU connector.
    G12729492Courtesy of HYUNDAI MOTOR AMERICA
  6. Remove the front sub frame.

    (Refer to "SUB FRAME ")

  7. Loosen the mounting bolt and nut then remove the PSU.

    Tighten torque: 

    19.6 - 29.4 N.m (2.0 - 3.0 kgf.m, 14.5 - 21.7 lb-ft)

    G12729493Courtesy of HYUNDAI MOTOR AMERICA