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Home >> Kia >> 2020 >> Niro LX >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Active Hydraulic Boost (AHB) System (HEV) >> Brake Actuation Unit >> Repair Procedures >> Removal

Repair Procedures: Removal

CAUTION: The following instructions describe how to diagnose faults using a diagnostic instrument.
  1. Connect self-diagnosis connector (16pins) located under the driver side crash pad to self-diagnosis device, and then turn the self-diagnosis device after key is ON.
  2. Select the "vehicle model" and "ESC/AHB" on KDS vehicle selection screen.
  3. Select the "High Pressure Release Mode" on KDS screen, then select OK.
  4. Proceed with the test according to the screen instructions.
    G13437679Courtesy of KIA MOTORS AMERICA, INC.
  1. Turn ignition switch OFF and disconnect the negative (-) battery terminal.
  2. Disconnect the ECM & TCM bracket.

    (Refer to Engine Control System - "ENGINE CONTROL MODULE (ECM) ")

  3. Remove the air cleaner assembly.

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

  4. Remove the brake fluid from the master cylinder reservoir with a syringe.
    CAUTION: Do not spill brake fluid on the vehicle as it may damage the paint. If brake fluid comes in contact with the paint, wash off immediately with water.
  5. Remove the nuts (A), hose (B), brake fluid level sensor connector (C).

    Tightening torque: 

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

    G13437680Courtesy of KIA MOTORS AMERICA, INC.
  6. Disconnect the integrated brake actuation unit (IBAU) connector (A) and brake tube (B).
    G13437681Courtesy of KIA MOTORS AMERICA, INC.
  7. 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)

    G13437682Courtesy of KIA MOTORS AMERICA, INC.
  8. Remove the snap pin (A) and clevis pin (B).
    G13437683Courtesy of KIA MOTORS AMERICA, INC.
  9. 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)

    G13437684Courtesy of KIA MOTORS AMERICA, INC.