| 1. Start the engine and in 1–2 minutes stop it. Press a brake pedal with usual effort. If the first course of a pedal a long and second course is shorter, than the first course is testifies to normal operation of the vacuum amplifier of brakes. |
| 2. At the switched-off engine several times press a brake pedal. Start the engine. If the pedal of a brake moves down at once after engine start-up, it testifies to normal operation of the vacuum amplifier of brakes. |
3. Start the engine.
Press a brake pedal with usual effort. Stop the engine. Slowly press a pedal of a brake and hold it pressed during 30 pages. If the height of a pedal does not change, the vacuum amplifier of brakes works normally.
Otherwise, check the unilateral vacuum valve or a vacuum hose on absence of damages and check reliability of their fastenings. |
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