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ON-VEHICLE SERVICE TSB Revision BASIC BRAKE SYSTEM 35A-15 (2) With the engine stopped, step on the brake pedal several times. Then step on the brake pedal and start the engine. (3) With the engine running, step on the brake pedal and then stop the engine. Hold the pedal depressed for 30 2. If the above three tests are okay, the booster is OK. If one of the above three tests is not okay, the check valve, vacuum ), vacuum hose for leaks, high volume engine vacuum applied to booster. Repair or replace as necessary. CHECK VALVE OPERATION CHECK M1351009000376 CAUTION The check valve should not be removed from the vacuum CAUTION If the check valve is defective, replace it as an assembly pump. AC000871 AB WHEN ENGINE WHEN ENGINE AC000872 GOOD NO GOOD AB VACUUM PUMP CRITERIA Connection at the brake A negative pressure Connection at the intake A negative pressure AC000873 AB A B VALVE SPRING INTAKE BOOST- |