Brake Booster Inspection
  1. Have an assistant depress the brake pedal with a 98 N (10 kgf, 22 lbf) and 294 N (30 kgf, 66 lbf) of pressure measuring with a commercially available pressure gauge (A).
  1. The following pressures should be observed at the pressure gauges in each vacuum.

    Except KQ model

    Vacuum booster Vacuum kPa (mmHg, in.Hg)
    Brake pedal pressure N (kgf, lbf)
    Master cylinder oil pressure kPa (kgf/cm 2 , psi)
    0 (0, 0)
    98 (10, 22)
    0 (0, 0)
    294 (30, 66)
    1,539 (15.7, 223)
    66.7 (500, 19.7)
    98 (10, 22)
    4,988 (50.9, 723)
    294 (30, 66)
    9,055 (92.3, 1,313)


    KQ model

    Vacuum booster Vacuum kPa (mmHg, in.Hg)
    Brake pedal pressure N (kgf, lbf)
    Master cylinder oil pressure kPa (kgf/cm 2 , psi)
    0 (0, 0)
    98 (10, 22)
    0 (0, 0)
    294 (30, 66)
    1,754 (17.9, 254)
    66.7 (500, 19.7)
    98 (10, 22)
    6,399 (65.3, 928)
    294 (30, 66)
    11,809 (120.4, 1,713)

  1. Inspect the master cylinder for leaks if the readings do not fall within the limits shown above.