Maintenance and service/Brake booster
Brake booster
Brake pedal
S11AQ S11AR
If the brake booster does not operate as
described in the following procedure, have
it checked by your SUBARU dealer.
1. With the engine off, depress the brake
pedal several times, applying the same
pedal force each time. The distance the
pedal travels should not vary.
2. With the brake pedal depressed, start
the engine. The pedal should move slightly
down to the floor.
3. With the brake pedal depressed, stop
the engine and keep the pedal depressed
for 30 seconds. The pedal height should
not change.
4. Start the engine again and run for
approximately 1 minute then turn it off.
Depress the brake pedal several times to
check the brake booster. The brake
booster operates properly if the pedal
stroke decreases with each depression. Check the brake pedal free play and
reserve distance according to the main-
tenance schedule in the “Warranty and
Maintenance Booklet”.
11-21
& Checking the brake pedal re-
serve distance
S11AR02
& Checking the brake pedal free
play
S11AR01
1)
1)
0.02 – 0.11 in (0.5 – 2.7 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 lbf (10
N, 1 kgf).
If the free play is not within proper
specification, contact your SUBARU deal-
er.
More than 2.56 in (65 mm)
Depress the pedal with a force of approxi-
mately 66 lbf (294 N, 30 kgf) and measure
the distance between the upper surface of
the pedal pad and the floor.
When the measurement is smaller than
the specification, or when the pedal does
not operate smoothly, contact with your
SUBARU dealer.