Subaru IMPREZA GD 2007 Series Manual page 3115

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ABS Control Module and Hydraulic Control Unit (ABSCM&H/U)
ABS
10) Check that there is no foreign matter in mating
surface between the ABSCM & H/U.
®
11) Using a TORX bit E5, tighten the screws in the
order of (1) through (4) again.
Tightening torque:
3 N·m (0.3 kgf-m, 2.2 ft-lb)
12) Check that there is no gap in the mating sur-
face between ABSCM & H/U.
13) Install the ABSCM&H/U to the vehicle. <Ref. to
ABS-6, INSTALLATION, ABS Control Module and
Hydraulic Control Unit (ABSCM&H/U).>
D: INSPECTION
1) Check the condition of connection and settle-
ment of connector.
2) Check the mark used for ABSCM&H/U identifi-
cation.
Identification mark
PK
PL
MJ
(1)
(1) Identification mark
1. CHECKING THE HYDRAULIC UNIT ABS
OPERATION BY PRESSURE GAUGE
1) Lift up the vehicle, and remove the wheels.
2) Remove the air bleeder screws from FL and FR
caliper bodies.
3) Connect two pressure gauges to FL and FR cal-
iper bodies.
CAUTION:
• Use a pressure gauge used exclusively for
brake fluid measurement.
• Do not use a pressure gauge used previously
for measurement of transmission oil pressure,
as the piston seal may expand and deform.
NOTE:
Wrap sealing tape around the pressure gauge.
4) Bleed air from the pressure gauge.
5) Perform ABS sequence control. <Ref. to ABS-
10, ABS Sequence Control.>
6) When the hydraulic unit begins to work, first the
FL side performs decompression, hold and com-
Model pression, and then the FR side performs decom-
pression, hold and compression.
AT
7) Read values indicated on the pressure gauge
MT (except for STI)
and check if the fluctuation of the values between
STI
decompression and compression meets the stan-
dard values. Also check whether any irregular tight-
ness of the brake pedal can be felt.
Initial value
When
depressurized
When
ABS00384
pressurized
8) Disconnect the pressure gauges from FL and FR
caliper bodies.
9) Remove the air bleeder screws from RL and RR
caliper bodies.
10) Install the air bleeder screws of FL and FR cal-
iper bodies.
11) Connect two pressure gauges to RL and RR
caliper bodies.
12) Bleed air from the FL and FR caliper bodies.
13) Bleed air from the pressure gauge.
14) Perform ABS sequence control. <Ref. to ABS-
10, ABS Sequence Control.>
15) When the hydraulic unit begins to work, first the
RR side performs decompression, hold and com-
pression, and then the RL side performs decom-
pression, hold and compression.
16) Read the values indicated on the pressure
gauges and check if it is within specification.
17) After checking, remove the pressure gauges
from the caliper bodies.
ABS-8
ABS00134
Front wheel Rear wheel
3,500 kPa 3,500 kPa
2 2
(35 kgf/cm , 498 psi) (35 kgf/cm , 498 psi)
500 kPa 500 kPa
2 2
(5 kgf/cm , 71 psi) (5 kgf/cm , 71 psi)
or less or less
3,500 kPa 3,500 kPa
2 2
(35 kgf/cm , 498 psi) (35 kgf/cm , 498 psi)
or more or more