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Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Active Hydraulic Boost (AHB) System (HEV) >> 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.
    G13850655Courtesy 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)

    G13850656Courtesy 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.
    G13850657Courtesy of HYUNDAI MOTOR AMERICA
  6. Remove the front sub frame.

    (Refer to Suspension System - "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)

    G13850658Courtesy of HYUNDAI MOTOR AMERICA