Kia Optima Hybrid: AHB(Active Hydraulic Boost) System / Brake Actuation Unit Repair procedures

Removal
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Remove the air duct (A).

3.
Remove air cleaner assembly (B).

4.
Disconnect the brake fluid level switch connector (A), and remove the reservoir cap.

   
Be sure to completely remove foreign substances from around brake fluid reservoir and cap before opening the reservoir cap. If not, it may cause contamination of brake fluid and deterioration in braking performance.
5.
Remove the brake fluid from the reservoir with a syringe.
   
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.
6.
Disconnect reservoir hose from the reservoir and IBAU connecter (A).

7.
Disconnect the brake tube from the IBAU by loosening the tube flare nut (B).
   
Before removing the IBAU, high pressure in an accumulator of PSU should be reduced for safety by conducting "High pressure release mode" of GDS connected to TF HEV.

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

8.
Remove the brake pedal assembly. (Refer to the brake system group - brake pedal)
9.
Remove the IBAU mounting nuts (A) and then remove the IBAU.

Tightening torque:
12.7 ~ 15.7 N.m (1.3 ~ 1.6 kgf.m, 9.4 ~ 11.6 lb-ft)

Installation
1.
Installation is the reverse of removal.
2.
Check the brake pedal operation.
3.
After filling the brake fluid in the reservoir, perform the air bleed. (Refer to the Brakde system - Brake Bleeding Procedures)
4.
Conduct calibration after removing the brake pedal assembly. (Refer to the brake pedal - calibration)
Brake Actuation Unit Components and Components Location

Components     IBAU must not be disassembled. 1. ECU2. Reservoir3. Master cylinder Assembley 4. Valve block ...

Pressure Source Unit Components and Components Location

Components     PSU must not be disassembled. 1. Motor connecter2. Bracket3. Block4. Accumulator5. Damper6. Motor ...

Other information:

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Power Window Relay Repair procedures


Inspection Diagnosis With GDS 1. It will be able to diagnose defects of power window with GDS quickly. GDS can operates actuator forcefully, input/output value monitoring and self diagnosis. 2. Select model and "BCM". 3. Select the "SJB" to check. 4. Select "Current data", if you will check current data ...

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Troubleshooting


Troubleshooting Examples of False-Alarm Occurrence from system characteristics (It’s not a problem) – Characteristics of EM Wave : EM Waves are reflected against all material and especially metal very well. Reflections of EM Waves are varies with the shape of object. (? EM : Electro Magnetic) – ...

© 2024 Copyright www.koptimatfhev.com