Warning: The vehicles described in this manual are equipped with a passive restraint system (SRS), also known as an air spring system. Before carrying out work in the area where the elements of this system are located, you should turn off its power, since accidental deployment of the airbags can result in serious injury (see _ chapter 12).
Examination
Functionality check
1. Press the brake pedal and start the engine. Normal operation of the vacuum booster is confirmed by a slight decrease in the pedal.
2. Press the brake pedal several times with the engine running and make sure that it does not drop to the floor.
Leak test
3. Start and, after a couple of minutes, turn off the engine. Slowly press the brake pedal several times. An increase in ride stiffness with successive pedal presses indicates the tightness of the amplifier.
4. With the engine running, depress the brake pedal, then, without releasing the pedal, turn off the engine. If the pedal height does not change within 30 seconds, the usshuPel is sealed.
Removal
5. Turn off the power to the SRS system (see chapter 12). Disconnect the negative cable from the battery.
6. Disconnect the vacuum hose from the amplifier (see illustration).
9.6. Pull the vacuum hose fitting out of the rubber coupling of the amplifier in a perpendicular direction
7. Remove the master cylinder without disconnecting the brake lines. Pull the amplifier forward and away from the treatment area. Do not allow brake lines to become kinked or twisted.
8. Remove the panel located on the left under the instrument panel.
9. Remove the rod lock (see illustration) and pull the brake light switch and rod off the pin.
9.9. Pry up and remove the brake light switch retainer and the vacuum booster rod from the brake pedal pin
10. Unscrew the four nuts that secure the vacuum booster to the engine compartment bulkhead (see illustration).
9.10. Unscrew the vacuum booster mounting nuts
11. Pull the amplifier off the partition by moving it in a perpendicular direction. so that the pins come out of the holes, then remove the amplifier along with the gasket from the engine compartment.
Installation
12. Installation is carried out in the reverse order of removal. Install a new gasket and tighten the nuts securing the booster and the brake master cylinder to the required torques.