Subaru LEGACY 2003 Service Manual page 16

VDC
6) Read values indicated on the brake tester and
check if the fluctuation of values, when decom-
pressed and compressed, meet the standard val-
ues.
Front wheel
Initial value
(100 kgf, 221 lb)
When
(50 kgf, 110 lb)
decompressed
When
(100 kgf, 221 lb)
compressed
7) After checking, also check if any irregular brake
pedal tightness is felt.
3. CHECKING THE HYDRAULIC UNIT VDC
OPERATION BY PRESSURE GAUGE
1) Lift-up vehicle and remove wheels.
2) Disconnect the air bleeder screws from the FL
and FR caliper bodies.
3) Connect two pressure gauges to the FL and FR
caliper bodies.
CAUTION:
• Pressure gauges used exclusively for brake
fluid must be used.
• Do not employ pressure gauge previously
used for transmission since the piston seal is
expanded which may lead to malfunction of the
brake.
NOTE:
Wrap sealing tape around the pressure gauge.
4) Bleed air from the pressure gauges.
5) Perform VDC sequence control.
<Ref. to VDC-19, VDC Sequence Control.>
6) When the hydraulic unit begins to work, and first
the FL side performs decompression, holding, and
compression, and then the FR side performs de-
compression, holding, and compression.
HYDRAULIC CONTROL UNIT (H/U)
Rear wheel
981 N 981 N
(100 kgf, 221 lb)
490 N 490 N
(50 kgf, 110 lb)
or less or less
981 N 981 N
(100 kgf, 221 lb)
or more or more
ABS00134
7) Read values indicated on the pressure gauge
and check if the fluctuation of the values between
decompression and compression meets the stan-
dard values. Also check if any irregular brake pedal
tightness is felt.
When
compressed
When
decom-
pressed
8) Remove pressure gauges from FL and FR cali-
per bodies.
9) Remove air bleeder screws from the RL and RR
caliper bodies.
10) Connect the air bleeder screws to the FL and
FR caliper bodies.
11) Connect two pressure gauges to the RL and
RR caliper bodies.
12) Bleed air from the pressure gauges and the FL
and FR caliper bodies.
13) Perform VDC sequence control.
<Ref. to VDC-19, VDC Sequence Control.>
14) When the hydraulic unit begins to work, at first
the RR side performs decompression, holding, and
compression, and then the RL side performs de-
compression, holding, and compression.
15) Read values indicated on the pressure gauges
and check if they meet the standard value.
16) After checking, remove the pressure gauges
from caliper bodies.
17) Connect the air bleeder screws to RL and RR
caliper bodies.
18) Bleed air from brake line.
VDC-14
Front wheel
2,942 kPa
2
(30 kg/cm , 427 psi) (20 kg/cm
or more
490 kPa
2
(5 kg/cm , 71 psi) (5 kg/cm
or less
Rear wheel
1,961 kPa
2
, 284 psi)
or more
490 kPa
2
, 71 psi)
or less