Leak Test
WARNING: This page is about a different car, the 2006 Honda Odyssey and 2005 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
- Press the brake pedal with the engine running, then stop the engine. If the brake pedal height does not vary while pressed for 30 seconds, the vacuum booster is OK. If the brake pedal rises, the booster is faulty.
- Start, then turn off the engine and wait 30 seconds. Then press the brake pedal several times using normal pressure. When the brake pedal is first pressed, it should be low. On consecutive applications, the brake pedal height should gradually rise. If the brake pedal position does not vary, check the booster check valve.
- Disconnect the brake booster vacuum hose (check valve built-in) (A) at the booster side.
- Start the engine, and let it idle. There should be vacuum available. If no vacuum is available, the check valve is not working properly. Replace the brake booster vacuum hose and check valve, and retest.
- Reconnect the vacuum hose to the brake booster.
- Start the engine, and then pinch the brake booster vacuum hose between the check valve and the booster.
- Turn the engine off and wait 30 seconds. Press the brake pedal several times using normal pressure. When the brake pedal is first pressed, it should be low. On consecutive applications, the brake pedal height should gradually rise.
- If the brake pedal position does not vary, replace the brake booster.
- If the brake pedal position varies, replace the brake booster vacuum hose/check valve assembly.