Hyundai Kona Quiz
Brake System

Brake Booster Repair Procedures

In this manual: Brake System
General Information — 17Engine Mechanical System — 85Engine Electrical System — 50Emission Control System — 26Engine Control System/Fuel System — 152DCT (Dual Clutch Transmission) System — 50Four-Wheel Drive (4WD) System — 21Propeller Shaft and Axle (2WD-FF) — 28Suspension System (without ECS) — 32Steering — 21Restraints — 38Brake System — 64Body (Interior and Exterior) — 205Body Electrical System — 1Heating, Ventilation, and Air Conditioning — 66
17steps
~102min
4/5difficulty
0102030405025.519N·mlb·ft
Tightening torque found on this page
Done 0 of 17

Brake Booster Operation Test

Perform the following tests to simply check the operation of the brake booster.
  1. Start the engine for one or two minutes, then stop it. If the pedal fully depresses the first time but gradually rises on subsequent depressions, the booster is operating correctly. If the pedal height remains unchanged, the booster is not operating.
  2. With the engine stopped, depress the brake pedal several times. Then depress the brake pedal and start the engine. If the pedal moves slightly down, the booster is in good condition. If there is no change, the booster is not operating.
  3. With the engine running, depress the brake pedal, then stop the engine. Keep the pedal depressed for 30 seconds. If the pedal height does not change, the booster is in good condition. If the pedal rises, the booster is not operating.
    If the above three tests are all good, the booster performance can be considered good. Even if one of the above three tests is not good, check the check valve, vacuum hose, and booster for malfunction.

Removal

  1. Turn the ignition switch OFF and disconnect the negative (-) battery cable.
  2. Remove the air cleaner. (Refer to Engine Mechanical System - "Air Cleaner")
  3. Remove the battery. (Refer to Engine Electrical System - "Battery")
  4. Remove the ECM. (Refer to Engine Control System - "ECM")
  5. Disconnect the brake fluid level switch connector (A).
  6. Remove the vacuum hose (A) after releasing the disconnect clip.
  7. Remove the master cylinder. (Refer to Brake System - "Master Cylinder")
  8. Remove the lock pin (A) and the flat head pin (B).
  9. Remove the brake booster by loosening the booster mounting nuts (A).

    Tightening torque: 16.7–26 N·m

Inspection

  1. Inspect the vacuum hose for damage.
  2. Check the boot for damage.

Installation

  1. To install, reverse the removal procedure.
  2. After installation, bleed the brake system. (Refer to Brake System - "Brake Bleeding") (Refer to Brake System - "ABS Bleeding") (Refer to Brake System - "ESP Bleeding")
  3. Check for brake fluid leakage and pedal condition.

Test yourself

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