 printable version
Check the brake servo
Step 1
| PERFORMANCE ORDER | | 1. With the engine off, repeatedly press the brake pedal. | | 2. Start up the engine. |  | 3. If the brake pedal is moved down immediately after the engine starts, it indicates normal operation of the vacuum brake booster. |
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Step 2
| PERFORMANCE ORDER | | 1. Start up the engine. | | 2. After 1-2 minutes, stop the engine. | | 3. Press the brake pedal with ordinary effort. |  | 4. If the first pedal stroke - a long and second course, shorter than the first move, it indicates normal operation of the vacuum brake booster. | | 5. Otherwise, check up the unilateral vacuum valve or a vacuum hose for damage and check the reliability of their fastenings. |
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Step 3
| PERFORMANCE ORDER | | 1. Start up the engine. | | 2. Press the brake pedal with ordinary effort. | | 3. Stop the engine. | | 4. Slowly depress the brake pedal and hold it down for 30 seconds. |  | 5. If the pedal height does not change, the vacuum brake booster is working properly. | | 6. Otherwise check up the unilateral vacuum valve or a vacuum hose for damage and check the reliability of their fastenings. |
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If the problem still persists, perform a detailed inspection using a pressure gauge and a vacuum gauge.
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