Hyundai Venue (QX): Brake Booster / Repair procedures

Hyundai Venue (QX) (2020-2025) Service Manual / Brake System / Brake Booster / Repair procedures

Brake Booster Operating Test
For simple checking of the brake booster operation, carry out the following tests.
1.
Run the engine for one or two minutes, and then stop it. If the pedal depresses fully the first time but gradually becomes higher when depressed succeeding times, the booster is operating properly, if the pedal height remains unchanged, the booster is inoperative.

Hyundai Venue. Repair procedures
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.

Hyundai Venue. Repair procedures
3.
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 above three tests are okay, the booster performance can be determined as good.
Even if one of the above three tests is not okay, check the check valve, vacuum hose and booster for malfunction.

Hyundai Venue. Repair procedures
Removal
1.
Turn 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.
Remove the master cylinder.
(Refer to Brake System - "Brake Master Cylinder")
6.
Remove the fixing clip and the vacuum hose (A) from the brake booster.

Hyundai Venue. Repair procedures
7.
Loosen the mounting bolt (A) and than remove the main wiring bracket.

Hyundai Venue. Repair procedures
8.
Remove the snap pin (A) and the clevis pin (B).

Hyundai Venue. Repair procedures
9.
Loosen the fixed nut (A) and then removing the brake booster (B).
Tightening torque :
16.7 - 25.5 N.m (1.7 - 2.6 kgf.m, 12.3 - 18.8 lb-ft)

Hyundai Venue. Repair procedures

Hyundai Venue. Repair procedures
Inspection
1.
Inspect the check valve in the vacuum hose.
Hyundai Venue. Repair procedures   
•
Do not remove the check valve from the vacuum hose.
2.
Check the boot for damage.
Installation
1.
Install in the reverse order of removal.
Hyundai Venue. Repair procedures   
•
Before installing the pin, apply the grease to the joint pin.
•
Use a new snap pin whenever installing.
2.
After installation, bleed the brake system.
(Refer to Brake System - "Brake Bleeding Prcoedures")
3.
Check the brake oil leakage and pedal operating condition.

    Components 1. Reservoir cap 2. Reservoir 3. Brake booster 4. Master cylinder assembly 5. Clevis

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