Kia Optima: Brake Booster Operating Test - Brake Booster. Repair procedures - Brake System - Brake System - Kia Optima TF 2011-2024 Service ManualKia Optima: 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.

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.


Brake Booster. Repair procedures
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Removal
Brake Booster 1. Turn ignition switch OFF and disconnect the negative (-) battery cable. 2. Remove the air duct (B) and air cleaner assembly (A). ...

See also:

Outside rearview mirror
Be sure to adjust mirror angles before driving. Your vehicle is equipped with both lefthand and right-hand outside rearview mirrors. The mirrors can be adjusted remotely with the remote switch. The ...

Inside rearview mirror
Adjust the rearview mirror so that the center view through the rear window is seen. Make this adjustment before you start driving. WARNING - Rear visibility Do not place objects in the rear seat ...

Installation
1. Installation is the reverse of removal. 2. Perform the “Assembly check” with GDS. 3. Check that the brake operates normally by pushing the EPB ...

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