LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 1992 >> Cressida >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Disc & Drum >> Testing >> Power Brake Unit >> Leak Test

Leak Test

  1. Depress brake pedal with engine running. Turn ignition off. If pedal height does not vary while depressed for 30 seconds, vacuum booster is okay. If pedal height changes, check for air leaks.
  2. With engine stopped, depress brake pedal several times using normal pressure. Pedal should be low when first depressed. On consecutive applications, pedal height should gradually increase. If pedal height does not increase, check for air leaks.
scientia non olet · About LEMON Manuals