1. Press the brake pedal down hard to the stop at least five times with the engine off, then start the engine with the brake pedal pressed. Now the pedal should move down noticeably under your foot.
2. Disconnect the hose from the brake booster if the desired effect is not achieved.
3. Start the engine. Place your finger on the end of the hose and check for low pressure. If there is no low pressure, check the condition of the vacuum hose and make sure it is not damaged. Replace the hose if necessary. Tighten all hose clamps.
Diesel Engine Cars
4. Disconnect the hose from the brake booster vacuum pump and, by placing your finger on the end of the hose, check for low pressure, which should be created by the pump.
If the pump creates low pressure, measure it and replace the brake booster if necessary (in the workshop).
(The original article is posted on the website VWManual.ru)
Visitor comments