Brake Servo System
- With the engine off, depress the brake pedal several times applying the same pedal force: Make sure the travel distance should not change.
- With the brake pedal depressed, start the engine: Make sure the pedal should move slightly toward the floor.
- With the brake pedal depressed, stop the engine and keep the pedal depressed for 30 seconds: Make sure the pedal height should not change.
- Check valve is built into the vacuum hose. Disconnect the vacuum hose to inspect function of check valve.
Blow air into the vacuum hose from its brake booster side end: Air must flow out of engine side end of hose. Next blow air into the hose from engine side: Air should not to brake booster side.
Replace both check valve and vacuum hose if the check valve is faulty. Engine side of vacuum hose is indicated by marking "ENG" as shown in illustration.
- Check the vacuum hose for cracks or other damage.CAUTION: When installing the vacuum hose on the engine and brake booster, do not use soapy water or lubricating oil on their connections.
- Check vacuum hose to make sure it is tight and secure.