Hyundai Creta: Brake System / Brake Booster

Hyundai Creta GS 2014-2025 Service Manual / Brake System / Brake System / Brake Booster

Components and components location

Components

1. Brake booster
2. Master cylinder assembly

3. Reservior

Repair procedures

Brake Booster Operating Test

For simply checking the brake booster operation, perform the following tests.

1.	Run the engine for one or two minutes, and then stop it. Depress the pedal several times, and if the pedal stroke gradually decreases, the brake booster operates properly. If there is no change, the booster is faulty.

2.	With the engine stopped, step on the brake pedal several times. Then step on the brake pedal and start the engine. If the pedal moves downward slightly, the booster is in good condition. If there is no change, the booster is inoperative.

With the engine running, step on the brake pedal and then stop the engine.Hold 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 inoperative.

If the three tests mentioned above result in good condition, the booster performance can be determined as good.

Even if one of the three tests mentioned above is not in good condition, check the check valve, vacuum hose and booster for malfunction.

Removal

[LHD]

1.	Turn ignition switch OFF and disconnect the negative (-) battery cable.

2.	Disconnect the battery positive terminal and then remove the battery.

3.	Disconnect the ECM connector and then ECM and battery tray.

4.	Disconnect the vacuum hose (A) from the brake booster.

5.	Disconnect the brake fluid level switch connector from the reservoir.

6.	Remove the master cylinder. (Refer to Brake Sysem - "Master Cylinder")

7.	Remove the snap pin and clevis pin

Remove the mounting nuts.

Tightening torque :

16.7 ~ 25.5 N.m (1.7 ~ 2.6 kgf.m, 12.3 ~ 18.8 lb-ft)

9.	Remove the brake booster.

[RHD]

1.	Turn ignition switch OFF and disconnect the negative (-) battery cable.

2.	Disconnect the brake fluid level sensor connector (A).

3.	Disconnect the vacuum hose from the brake booster.

Remove the brake fluid from the master cylinder 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.

5.	Remove the brake fluid hose from the reservoir. [M/T only]

6.	Remove the brake master cylinder. (Refer to Brake System - "Master Cylinder") Remove the snap pin and clevis pin

Remove the mounting nuts.

Tightening torque :

16.7 ~ 25.5 N.m (1.7 ~ 2.6 kgf.m, 12.3 ~ 18.8 lb-ft)

Inspection

1.	Inspect the vacuum hose.

2.	Check the boot for damage.

Installation

Install in the reverse order of removal.

•	Before installing the pin, apply the grease to the joint pin.

•	Use a new snap pin whenever installing.

2.	After installing, bleed the brake system. (Refer to Brake Sysem - "Brake System Bleeding") (Refer to ESP (Electronic Stability Program) System - "ESP System Bleeding") (Refer to ABS (Anti - Lock Brake System) - "ABS System Bleeding")

Repair procedures

Operation and Leakage Check Check all of the following items : Component Procedure Brake Booster (A) Check brake operation by ...

Master Cylinder

Components and components location Components 1. Brake booster 2. Master cylinder assembly 3. Reservior Repair procedures Removal ...

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