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. Check that the pedal moves slightly toward the floor.
- With the brake pedal depressed, stop the engine and keep the pedal depressed for 30 seconds. Check that the pedal height does not change.
- A check valve is built into the vacuum hose. Remove the vacuum hose to inspect function of the check valve.
Blow air into vacuum hose from its brake booster side. Check that the air flows out to the engine side of the air hose. Next blow air into hose from engine side: Check that the air does not flow out to the brake booster side.
Replace the 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 the figure.
- 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 that the vacuum hose is securely mounted.