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Home >> Acura >> 2001 >> 3.5RL >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Disc Brakes) >> Testing >> Power Brake Unit >> Leak Test

Leak Test

WARNING: This page is about a different car, the 2000 Acura 3.5RL, 2000 Acura 3.2TL, 1999 Acura 3.5RL, and 1999 Acura 3.2TL. However, it is still accessible from the selected car via links, so may be relevant.
  1. Press brake pedal with engine running. Turn ignition off. If pedal height does not change with pedal pressed for 30 seconds, vacuum booster is okay. If pedal rises, vacuum booster is leaking.
  2. With engine stopped, press brake pedal several times with normal pressure. Pedal should be low when first pressed. On consecutive applications, pedal height should gradually increase. If pedal height does not change, check power brake booster check valve.
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