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Home >> Infiniti >> 2002 >> QX4 4WD >> Repair and Diagnosis >> Brakes >> Anti-Lock/Traction Control >> Preparation >> Brake Booster >> On-vehicle Service >> Operating Check

Operating Check

  1. Depress brake pedal several times with engine off. After exhausting vacuum, make sure there is no change in pedal stroke.
  2. Depress brake pedal, then start engine. If pedal goes down slightly, operation is normal.
    Fig 1: Checking Brake Booster Operation
    G02004404Courtesy of NISSAN MOTOR CO., U.S.A.
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