3000GT Convertible AWD V6-2972cc 3.0L DOHC Turbo (1995)
Vacuum Brake Booster: Testing and Inspection
1. Run engine for two minutes, then turn engine off. Depress brake pedal slowly several times.
Fig. 1 Brake Booster Functional Inspection
2. Pedal should go down farther the first time and rise gradually the second and third time, Fig. 1. If pedal height remains the same booster is faulty.
3. With engine off, depress brake pedal several times, Fig. 1. There should be no change in pedal stroke.
4. With brake pedal depressed, start engine. Pedal should go down slightly, if no change in pedal, booster is faulty.
5. With engine running and brake pedal depressed, stop engine.
6. If after 30 seconds there is no change in pedal movement, the booster is in good condition, Fig. 1. If pedal rises booster is faulty.
