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Home >> Kia >> 2018 >> Niro EX >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> 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 terminal.
  2. Disconnect the TCM connector.

    (Refer to DCT (Dual Clutch Transmission) System - "DCT CONTROL MODULE (TCM) ")

  3. Disconnect the ECM connector.
  4. Remove the air cleaner assembly.

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

  5. Remove the brake fluid from the reservoir.
    CAUTION: 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.
  6. Remove the nuts, hose, brake fluid level sensor connector (A).

    Tightening Torque: 

    6.8 - 10.7 N.m (0.7 - 1.1 kgf.m, 5.0 - 7.9 lb.ft)

    Fig 1: Removing Nuts, Hose And Brake Fluid Level Sensor Connector
    G12329797Courtesy of KIA MOTORS AMERICA, INC.
  7. Disconnect the integrated brake actuation unit (IBAU) connector and brake tube.
    Fig 2: Disconnecting Integrated Brake Actuation Unit (IBAU) Connector And Brake Tube
    G12329798Courtesy of KIA MOTORS AMERICA, INC.
    CAUTION: The following procedure describes how to diagnose faults using a diagnostic instrument.
    1. Connect the diagnostic instrument to the self-diagnostic connector (16-pin) beneath the crash pad on the side of driver's seat, and then turn on the ignition to activate the diagnostic instrument
    2. In the GDS Vehicle Type Selection menu, select "Vehicle Type" and "Brake/VDC/AHB" System.
      Fig 3: Screen Display - High Pressure Release Mode (1 Of 4)
      G12329799Courtesy of KIA MOTORS AMERICA, INC.
      Fig 4: Screen Display - High Pressure Release Mode (2 Of 4)
      G12329800Courtesy of KIA MOTORS AMERICA, INC.
      Fig 5: Screen Display - High Pressure Release Mode (3 Of 4)
      G12329801Courtesy of KIA MOTORS AMERICA, INC.
      Fig 6: Screen Display - High Pressure Release Mode (4 Of 4)
      G12329802Courtesy of KIA MOTORS AMERICA, INC.
    3. Disconnect the negative (-) battery terminal.
  8. Loosen the flare nuts (A) from the integrated brake actuation unit (IBAU) and then remove the brake tube.

    Tightening Torque: 

    12.7 - 16.7 N.m (1.3 - 1.7 kgf.m, 9.4 - 12.3 lb.ft)

    Fig 7: Loosening Flare Nuts From Integrated Brake Actuation Unit
    G12329803Courtesy of KIA MOTORS AMERICA, INC.
  9. Remove the snap pin (A) and cables pin (B).
    Fig 8: Removing Snap Pin And Cables Pin
    G12329804Courtesy of KIA MOTORS AMERICA, INC.
  10. Loosen the brake pedal nuts.

    Tightening Torque: 

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

    Fig 9: Loosening Brake Pedal Nuts
    G12329805Courtesy of KIA MOTORS AMERICA, INC.