Hyundai Ioniq: AHB(Active Hydraulic Boost) System / Repair procedures
AHB Brake System Bleeding Procedure |
Air Bleeding Tool Installation Procedure
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| To prevent the brake fluid reservoir tank from beingdamaged and ensure the safety of worker, set thepressure of the gauge to the standard value beforeinstalling the SST. |
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1. | Before installing the SST on the vehicle, close the airshut-off valve (A) to adjust the pressure gauge to thestandard value. 
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| For safety of worker and correct pressure setting,make sure that the plug (B) is installed correctly. |
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2. | After connecting an air hose and opening the airshut-off valve (A), adjust the pressure gauge (B) withto the standard value. Standard pressure value : 0.3 - 0.35 MPa (43.5 - 50.7 psi) |
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3. | close the air shut off valve (A) and remove the plug (B). 
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| For safety of worker, make sure that the air shut offvalve is closed and remove the plug. |
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4. | Remove the brake reservoir tank cap. |
5. | Install the cap (A) of SST (0K585-E8100) on thereservoir tank. 
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6. | Make sure the check valve (A) is closed and connect SST (09580-3D100) (A) to the adapter (B). 
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Air Bleeding Tool Removal Procedure
1. | To remove the SST (09580-3D100) from the vehicle,close the air shut-off valve (A) first. 
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2. | Remove SST (09580-3D100) and the cap of SST (0K585-E8100) on the reservoir tank. 
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| To prevent backflow of brake fluid, be sure to open the air shut-off valve slowly then bleed air in the reservoir tank. |
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3. | Inatall the brake reservoir tank cap. |
AHB Brake System
Bleeding Step 1 (IBAU ECU OFF) |
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| IBAU filled with brake oil should be used for bleeding. |
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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. 
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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 srews) ② 4 wheels (RR -> RL -> FR -> FL) 
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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 (RR -> RL -> FR -> FL) |
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| Repeat it until air bubbles no longer appear in the fluid |
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| Be cautious that air come in the brake line with opening the bleed screws too much. |
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Bleeding Step 2 (IBAU ECU ON) |
1. | Connect the negative (-) battery terminal to turn on IBAU ECU. |
3. | Set the front wheels straight forward and the shift lever knob in Parking. |
4. | If the ESC function is completely turned off after about 3 seconds with the ESC Off switch held down, hold the ESC OFF switch and operate the brake pedal 10 times in full stroke. And then turn off the engine. •
| When stepping on the brake pedal, press 40mm or more, and when releasing it, press down 10mm or less. |
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| The ESC OFF switch must be held down until the pedal operation is finished and the engine is turned off. |
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5. | Start the engine. And then press the ESC OFF switch for more than 3 seconds to enter ESC OFF mode. •
| Running from 1 to 5, you can enter the air bleeding mode. |
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| If you do not air bleeding in air bleeding mode, it will not work properly. |
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| The ABS, ESC OFF, EBD warning lamp is turned ON can be confirmed the entry into the air bleeding mode. |
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| The air bleeding mode process should be completed within 30 seconds. |
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The air bleeding mode is released in each following condition. •
| Igniton OFF and shift lever knob in D/R/N |
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| Brake fluid level is under "MIN" |
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6. | Use the air bleeding tool (SST : 09580-3D100, 0K585-E8100) and feed oil pressure 0.3 - 0.35 MPa (43.5 - 50.7 psi) into the reservoir. Loosen the bleed screws on 4 wheels; then, initiate air bleeding and close them while depressing the brake pedal half stroke continuously. Perform it 10 times; then, release the brake pedal. Bleed screw sequence : ③ 4 wheels 
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| Repeat it until air bubbles no longer appear in the fluid. |
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| Be cautious that air come in the brake line with opening the bleed screws too much. |
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7. | Connect the GDS to the data link connector located underneath the dash panel and perform "Fluid Circulation Mode" on GDS. |
Components
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IBAU (Intergrated Brake Actuation Unit) must not be disassembled.1. Intergrated Brake Actuation Unit (IBAU) ECU2...
Other information:
C..
Inspection1.Turn the ignition switch OFF.2.Disconnect the temperature control actuator connector.3.Verify that the temperature control actuator operates to the cool position when connecting 12V to terminal 3 and grounding terminal 7.Verify that the temperature control actuator operates to the warm position when connected in reverse...
Categories
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The Driver Position Memory System is provided to store and recall the following
memory settings with a simple button operation.
- Driver's seat position
- Side view mirror position
- Instrument panel illumination intensity
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