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C1015:7A, C1015:7B

  1. R1 CHECK FOR VACUUM LEAKS 
    • Start the engine.
    • Inspect the vacuum hose and each hose connection from the vacuum pump to the brake booster for leaks.

    Are any vacuum leaks found? 

    1. Yes  : REPAIR the vacuum leak or INSTALL new components as necessary.
    2. No  : If the vehicle is equipped with a 1.6L EcoBoost engine or a 2.0L EcoBoost engine, GO to R2 

      If the vehicle is equipped with a 2.5L Duratec engine, INSTALL a new brake booster. REFER to: BRAKE BOOSTER .

  2. R2 CHECK THE VACUUM PUMP OUTPUT 
    • Ignition OFF.
    • Disconnect the vacuum hose from the brake booster.
    • Connect a vacuum gauge to the vacuum hose.
    • Start the engine.
    • Monitor the vacuum gauge.

    Does the vacuum gauge display greater than 600 mBar (18 In-Hg)? 

    1. Yes  : INSTALL a new brake booster.

      REFER to: BRAKE BOOSTER .

    2. No  : INSTALL a new vacuum pump.

      REFER to: BRAKE VACUUM PUMP - 1.6L ECOBOOST (132KW/180PS) - SIGMA .

      REFER to: BRAKE VACUUM PUMP - 2.0L ECOBOOST (184KW/250PS) - MI4 .

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