Clutch Assist Booster: Testing and Inspection

1. Run engine for one minute or more, then turn engine off.
2. Step on clutch pedal several times with normal pressure.
3. If pedal depressed fully the first time but gradually becomes higher when depressed several times, the booster is operating correctly.
4. If pedal height remains unchanged, booster is faulty.
5. With engine off, step on clutch pedal several times with same foot pressure, then step on clutch pedal and start engine.
6. If pedal moves downward slightly, booster is in good condition. If there is no change in pedal height, booster is faulty.
7. With engine idling, step on clutch pedal and turn engine off.
8. If pedal height does not change, booster is operating correctly. If pedal height rises, booster is faulty.
9. If one or more of the above tests fail, ensure condition of valve and vacuum hose and if necessary, replace booster.