Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Brake Booster(for Gasoline Model): Inspection
INSPECTION PROCEDURE 1. INSPECT BRAKE VACUUM CHECK VALVE ASSEMBLY (a) Check that there is ventilation from the booster side to the engine side, and no ventilation from the engine side to the booster side of the brake vacuum check valve assembly. HINT: If the result is not as specified, replace the b ...
