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Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> Active Hydraulic Boost (AHB) System (HEV) >> Brake Actuation Unit >> Repair Procedures >> Removal

Repair Procedures: Removal

  1. Turn ignition switch OFF and disconnect the negative (-) battery cable.
  2. Disconnect TCM connector (A).
  3. Disconnect TCM connector (B).
    G13850640Courtesy of HYUNDAI MOTOR AMERICA
  4. Loosen the bolt and nut (A) then remove the ECM, TCM with bracket (B).
    G13850641Courtesy of HYUNDAI MOTOR AMERICA
  5. Remove the air cleaner.

    (Refer to Engine Mechanical System - "AIR CLEANER ")

  6. In case of RHD vehicle, remove the engine and transmission assembly.

    (Refer to Engine Mechanical System - "ENGINE AND TRANSMISSION ASSEMBLY ")

  7. 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.
  8. Disconnect the brake hose from the reservoir.
    G13850642Courtesy of HYUNDAI MOTOR AMERICA
  9. Disconnect the brake fluid level switch connector (A).
    G13850643Courtesy of HYUNDAI MOTOR AMERICA
  10. Disconnect IBAU connector.
    G13850644Courtesy of HYUNDAI MOTOR AMERICA
  11. Disconnect the brake tube from the IBAU (Integrated Brake Actuation Unit) by loosening the tube flare nut.

    Tighten torque: 

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

    G13850645Courtesy 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.
  12. Disconnect the brake tube from the IBAU (Integrated Brake Actuation Unit) by loosening the tube flare nut.

    Tighten torque: 

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

    G13850646Courtesy of HYUNDAI MOTOR AMERICA
  13. Remove the rear brake tube.
    G13850647Courtesy of HYUNDAI MOTOR AMERICA
  14. Remove the snap pin (A) and clevis pin (B).
    G13850648Courtesy of HYUNDAI MOTOR AMERICA
  15. Remove the mounting nuts (A) and then remove the brake pedal.

    Tightening torque: 

    16.7 - 25.5 N.m (1.7 - 2.6 kgf.m, 12.3 - 18.8 lb-ft)

    G13850649Courtesy of HYUNDAI MOTOR AMERICA