Check air tightness under load

WARNING: This page is about a different car, the 2004 Suzuki Vitara. However, it is still accessible from the selected car via links, so may be relevant.

With engine running, depress brake pedal. Then stop engine while holding brake pedal depressed.

Fig 1: Checking Brake Pedal (5 Of 6)
Courtesy of SUZUKI OF AMERICA CORP.
Hold brake pedal depressed for 30 seconds. If pedal height does not change, condition is good. But it isn't if pedal rises.

Fig 2: Checking Brake Pedal (6 Of 6)
Courtesy of SUZUKI OF AMERICA CORP.