Brake booster
The brake booster uses engine manifold vacuum to assist braking force. Do not turn off the engine while driving because that will turn off the brake booster, resulting in poor braking power.
The brakes will continue to work even when the brake booster completely stops functioning. If this happens, however, you will have to depress the pedal much harder than normal and the braking distance will increase.
See also:
ABS system self-check
You may feel a slight shock in the brake pedal and hear the operating sound of
ABS from the engine compartment just after the vehicle is started. This is caused
by an automatic functional test of ...
Channel preset
...
Function settings
A SUBARU dealer can change the settings of the functions shown in the
following table to meet your personal requirements. Contact
the nearest SUBARU dealer for details. If your vehicle is equipped ...