Subaru LEGACY 2006 Manual page 4268

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VDC Control Module and Hydraulic Control Unit (VDCCM&H/U)
VEHICLE DYNAMICS CONTROL (VDC)
4) Connect the brake pipes to their correct VDC-
CM&H/U positions.
Tightening torque:
<Ref. to BR-7, FRONT BRAKE PIPES AND
HOSES, COMPONENT, General Descrip-
tion.>
5) Connect the VDCCM&H/U connector.
NOTE:
• Be sure to remove all foreign matter from inside
the connector before connecting.
• Make sure the VDCCM&H/U connector is se-
curely locked.
6) Connect the pressure sensor connector.
7) Bleed air from the brake system.
C: INSPECTION
1) Check the condition of connection and settle-
ment of connector.
2) Check the mark used for VDCCM&H/U identifi-
cation.
Refer to "SPECIFICATION" for the identification
mark. <Ref. to VDC-2, SPECIFICATION, General
Description.>
(1)
(1) Identification mark
1. CHECKING THE HYDRAULIC UNIT ABS
OPERATION BY PRESSURE GAUGE
<Ref. to ABS-7, CHECKING THE HYDRAULIC
UNIT ABS OPERATION BY PRESSURE GAUGE,
INSPECTION, ABS Control Module and Hydraulic
Control Unit (ABSCM&H/U).>
2. CHECKING THE HYDRAULIC UNIT ABS
OPERATION WITH THE BRAKE TESTER
<Ref. to ABS-8, CHECKING THE HYDRAULIC
UNIT ABS OPERATION WITH THE BRAKE
TESTER, INSPECTION, ABS Control Module and
Hydraulic Control Unit (ABSCM&H/U).>
3. CHECKING THE HYDRAULIC UNIT VDC
OPERATION USING A 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 for the
measuring 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 VDC sequence control.
<Ref. to VDC-11, VDC Sequence Control.>
6) When the hydraulic unit begins to work, first the
FL side performs compression, hold, and decom-
pression, and then the FR side performs compres-
sion, hold, and decompression.
7) Read values indicated on the pressure gauge
and check if the fluctuation of the values between
decompression and compression meets specifica-
tion. Depress the brake pedal and check that it is
not abnormally hard, and tightness is normal.
VDC00202
When pressur-
ized
When depres-
surized
8) Disconnect the pressure gauges from FL and FR
caliper bodies.
9) Install the air bleeder screws of FL and FR cali-
per bodies.
10) Remove the air bleeder screws from RL and
RR caliper bodies.
11) Connect two pressure gauges to RL and RR
caliper bodies.
12) Bleed air from RL and RR caliper bodies, and
pressure gauge.
13) Perform VDC sequence control.
<Ref. to VDC-11, VDC Sequence Control.>
VDC-8
ABS00134
Front wheel Rear wheel
3,000 kPa 3,000 kPa
2
(31 kgf/cm , (31 kgf/cm
441 psi) 441 psi)
or more or more
500 kPa 500 kPa
2 2
(5 kgf/cm , 73 psi) (5 kgf/cm , 73 psi)
or less or less
2
,