Hyundai Venue: 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.

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 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.

7.	Loosen the mounting bolt (A) and than remove the main wiring bracket.

8.	Remove the snap pin (A) and the clevis pin (B).

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

Inspection

Inspect the check valve in the vacuum hose.

•	Do not remove the check valve from 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 installation, bleed the brake system. (Refer to Brake System - "Brake Bleeding Prcoedures")

3.	Check the brake oil leakage and pedal operating condition.

Components and components location

Master Cylinder

Other information:

Hyundai Venue (QX) (2020-2025) Service Manual: Transaxle Control Module (TCM). Schematic diagrams

TCM Connector Connector [A] Pin Description 2 35R clutch control solenoid valve (35R/C_VFS) 4 26 brake control solenoid valve (26/B_VFS) 5 Underdrive brake control solenoid valve (UD/B_VFS) 8 Inhibitor switch signal S2 (R) 19 Line pressure control solenoid valve (LINE_VFS) 21 Input speed sensor power 22 Output speed sensor power 32 Torque converter control solenoid valve (T/CON_VFS) 33 VB (Battery voltage) 34 Solenoid supply power 2 37 Output speed sensor signal 38 Inhibitor switch signal S4 (D) 39 Inhibitor switch signal S1 (P) 40 Manual mode up shift 42 Manual mode select switch 43 Oil temperature sensor (+) 45 VB (Battery voltage) 46 ON/OFF solenoid valve A(SS-A) 47 Overdrive clutch control solenoid valve (OD/C_VFS) 48 VB (Battery voltage) 49 Solenoid supply power 1 52 Input speed sensor signal 54 Inhibitor switch signal S3 (N) 57 Manual mode down shift 58 Oil temperature sensor (-) TCM Terminal input/ output signal Connector [A] Pin Description Condition Input/output value Type Level 2 35R clutch control solenoid valve (35R/C_VFS) - Output 0V/Battery voltage level 9V < Battery voltage level < 16V 4 26 brake control solenoid valve (26/B_VFS) - Output 0V/Battery voltage level 9V < Battery voltage level < 16V 5 Underdrive brake control solenoid valve (UD/B_VFS) - Output 0V/Battery voltage level 9V < Battery voltage level < 16V 8 Inhibitor switch signal S2 (R) High Input 0V/Battery voltage level Low 9V < Battery voltage level < 16V 19 Line pressure control solenoid valve (LINE_VFS) - Output 0V/Battery voltage level 9V < Battery voltage level < 16V 21 Input speed sensor power ON Power 0V/9V OFF 22 Output speed sensor power ON Power 0V/9V OFF 32 Torque converter control solenoid valve (T/CON_VFS) - Output 0V/Battery voltage level 9V < Battery voltage level < 16V 34 Solenoid power 2 Power 0V/Battery voltage level 9V < Battery voltage level < 16V 37 Output speed sensor signal High Input 0...

Hyundai Venue (QX) (2020-2025) Service Manual: Overdrive Clutch Control Solenoid Valve (OD/C_VFS). Description and operation

Description • Overdrive clutch control solenoid valve(OD/C_VFS) is attached to the valve body. • This variable force solenoid valve directly controls the hydraulic pressure inside the overdrive clutch...