See also:

Hill start assist OFF indicator light (STI)
While the Hill start assist system is deactivated, the Hill start assist OFF indicator light illuminates continuously to inform the driver that the Hill start assist system is not operational. ...

Checking the brake pedal free play
1) 0.08 – 0.18 in (2 – 5 mm) Stop the engine and firmly depress the brake pedal several times. Lightly pull the brake pedal up with one finger to check the free play with a force of less than 2 ...

Brake booster
If the brake booster does not operate as described in the following, have it checked by your SUBARU dealer. 1. With the engine off, depress the brake pedal several times, applying the same pedal forc ...