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Home >> Hyundai >> 2018 >> Ioniq Plug-In Hybrid >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Active Hydraulic Boost (AHB) System (PHEV) >> Schematic Diagrams >> Repair Procedures >> AHB Brake System Bleeding Procedure >> AHB Brake System >> Bleeding Step 1 (IBAU ECU OFF)

Bleeding Step 1 (IBAU ECU OFF)

NOTE:
  • IBAU filled with brake oil should be used for bleeding.
  1. Disconnect the negative (-) battery terminal to turn off IBAU ECU.
  2. Set the air bleeding tool (SST: 09580-3D100) and the cap of SST (0K585-E8100) to reservoir tank and make pressure (0.3 - 0.35 MPa (43.5 - 50.7 psi)) to it.
    G12729471Courtesy of HYUNDAI MOTOR AMERICA
  3. Initiate air bleeding on all bleed screws in the following sequences until air bubbles no longer appear in the fluid. After air bleeding, close the bleed screws.

    1 IBAU (2 bleed screws) 2 4 wheels (RR -> RL -> FR -> FL)

    G12729472Courtesy of HYUNDAI MOTOR AMERICA
  4. Perform air bleeding while stepping on the brake pedal and opening bleed screws; then, close bleed screws and release the brake pedal. Perform this procedure 10 times.
    • Bleed screw sequence: 1 IBAU (2 bleed srews) 2 4 wheels
    • Repeat it until air bubbles no longer appear in the fluid
    • Be cautious that air come in the brake line with opening the bleed screws too much.
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