BRAKE BOOSTER

Components and Component Location

COMPONENTS

Repair Procedures

BRAKE BOOSTER OPERATION TESTS

1. 1
   Start the engine and let it run for one to two minutes, then stop it. If the pedal goes down fully on the first press but rises gradually afterward, the brake booster is operating normally. If the pedal height remains the same, the brake booster is faulty.

   

2. 2
   With the engine off, depress the brake pedal several times. Then depress the brake pedal and start the engine. If the pedal drops slightly, the booster is in good condition. If there is no change, the booster is faulty.

   

3. 3
   Start the engine, depress the brake pedal, 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 not operating. If the three previous tests are satisfactory, the brake booster performance is good. Even if one of these tests is unsatisfactory, check that the check valve, vacuum hose and brake booster operate correctly.

   

DEPOSIT

1. 1
   Turn the ignition key to the OFF position and disconnect the negative (-) battery cable.
2. 2
   Remove the air cleaner assembly. (Refer to Engine Mechanical System - "Intake and Exhaust System")
3. 3
   Disconnect the brake fluid level switch connector (A).

   

4. 4
   Disconnect the vacuum hose from the brake booster.

   

5. 5
   Drain the brake fluid from the master cylinder reservoir using a syringe.
6. 6
   Remove the master cylinder. (Refer to Brake - "Master Cylinder")
7. 7
   Remove the safety clip (A) and cotter pin (B).

   

8. 8
   Remove the lock nuts (A).

   Tightening torque: 16.7 ~ 26 N·m N·m

   

9. 9
   Turn the ignition key to the OFF position and disconnect the negative (-) battery cable.
10. 10
    Disconnect the brake fluid level switch connector (A).

    

11. 11
    Disconnect the vacuum hose from the brake booster.

    

12. 12
    Drain the brake fluid from the master cylinder reservoir using a syringe.
13. 13
    Disconnect the brake fluid hose from the reservoir. [M/T Only]

    

14. 14
    Remove the brake master cylinder. (Refer to Brake - "Master Cylinder.")
15. 15
    Remove the safety clip (A) and cotter pin (B).

    

16. 16
    Remove the lock nuts (A).

    Tightening torque: 16.7 ~ 26 N·m N·m

    

Inspection

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

REMEDY

1. 1
   Installation is the reverse of removal.
2. 2
   After installation, bleed the brake system. (Refer to Brake System - "Brake System Bleeding")