## Conventional Brake Components

#### Brake Booster Inspection (cont'd)

19-31

Function Test

1. Install the vacuum gauge as same as the leak test.
2. Connect the oil pressure gauges (A) to the master cylinder using the attachments (special tools) as shown.
3. Bleed air through the valves.

4. Start the engine and let it idle.
5. 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).

6. The following pressures should be observed at the pressure gauges in each vacuum.

Vehicles With ABS

Vacuum kPa (mm Hg, in.Hg) | N (kgf, lbf) | kPa (kgf/cm², psi)
0 (0, 0) | 98 (10, 22) | 0 (0, 0)
294 (30, 66) | 1,700 (17, 240) *: 1,600 (16, 230)
66.7 (500, 19.7) | 98 (10, 22) | 4,600 (46, 670) *: 4,200 (43, 610)
294 (30, 66) | 10,500 (107, 1,500) *: 10,300 (105, 1,500)

*: 4-door KQ Model

Vehicles Without ABS

Vacuum kPa(mm Hg, in.Hg) | N (kgf, lbf) | kPa (kgf/cm2, psi)
0 (0, 0) | 98 (10, 22) | 0 (0, 0)
294 (30, 66) | 1,700 (17, 240) *1: 1,600 (16, 230) *2: 1,800 (18, 260)
66.7 (500, 19.7) | 98 (10, 22) | 4,400 (45, 640) *1: 4,100 (42, 600) *2: 4,800 (49, 700)
294 (30, 66) | 10,500 (107, 1,500) *1: 10,300 (105, 1,500) *2: 9,800 (100, 1,400)

*1: 4-door KQ Models and KK (VN) Models

*2: 4-door PA Models

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