Functional Test
WARNING: This page is about a different car, the 2004 Toyota Corolla and 2003 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
- Start engine. Turn ignition off. Depress brake pedal several times. Depress pedal firmly and hold for 15 seconds. If pedal sinks, master cylinder, brakeline or caliper piston is faulty.
- Start engine with pedal depressed. If pedal sinks slightly, vacuum unit is working properly. If pedal height does not vary, brake booster or check valve is faulty. Replace as necessary.