Subaru Legacy 2004 Service Manual page 3059

VDC Control Module & Hydraulic Control Unit (VDCCM&H/U)
14) When the hydraulic unit begins to work, first the
RR side performs compression, holding, and de-
compression, and then the RL side performs com-
pression, holding, and decompression.
15) Read the values indicated on the pressure
gauges and check it within specified. Depress the
brake pedal and check that it is not abnormally
hard, and tightness is normal.
16) Disconnect the pressure gauge from the RL
and RR caliper bodies.
17) Install the air bleeder screws of RL and RR cal-
iper bodies.
18) Bleed air from the brake line.
4. CHECK HYDRAULIC UNIT VDC OPERA-
TION WITH BRAKE TESTER
1) Set the wheels other than the measured one on
free rollers.
2) Prepare for operating the VDC sequence con-
trol.
<Ref. to VDC-11, VDC Sequence Control.>
3) Set the front wheels or rear wheels on the brake
tester and set the select lever position to "N" range.
(1)
(1) Brake tester
4) Operate the brake tester.
5) Perform VDC sequence control.
<Ref. to VDC-11, VDC Sequence Control.>
6) When the hydraulic unit begins to work; check
the following working sequence.
(1) The FL wheel performs compression, hold-
ing and decompression in sequence, and sub-
sequently the FR wheel repeats the cycle.
ABS00136
(1)
ABS00137
VDC-9
VEHICLE DYNAMICS CONTROL (VDC)
(2) The RR wheel performs compression, hold-
ing and decompression in sequence, and sub-
sequently the RL wheel repeats the cycle.
7) Read values indicated on the brake tester and
check if the fluctuation of the values between de-
compression and compression meets the standard
values.
Front wheel
2,000 N
When com-
(203 kgf, 447 lb)
pressed
or more
When decom-
(51 kgf, 112 lb)
pressed
8) After the inspection, depress the brake pedal
and check that it is not abnormally hard, and tight-
ness is normal.
D: ADJUSTMENT
When the following replacement, removal and in-
stallation is performed, be sure to perform the cen-
tering setting of steering angle sensor and zero
point setting of yaw rate & lateral G sensor.
• VDCCM&H/U
• Steering angle sensor
• Yaw rate & lateral G sensor
• Steering wheel parts (Including airbag)
• Suspension parts
• Wheel alignment adjustment
1) Park the vehicle straight on a level surface. (En-
gine operation on "P" or "N" range)
2) Check that steering wheels are positioned in
center. (When the center position is not correct, ad-
just the wheel alignment.)
3) Set the Subaru Select Monitor to vehicle, select
the {Set up mode for Neutral of Steering Angle
Sensor & Lateral G Sensor 0 point} on «Function
check sequence» display. (Follow the step on dis-
play.)
4) On the «Brake Control System» display screen,
select the {Current Data Display & Save}, and
check that the steering angle sensor is displayed "0
deg".
5) When the "0 deg" is not displayed, repeat the
above steps and check that the "0 deg" is dis-
played.
6) Drive the vehicle for 10 minutes, and check that
the ABS and VDC warning light is not illuminated.
7) Check that the unnecessary operation of VDC,
or losing control of steering is not occurred. And
when the malfunction occurred, repeat the above
steps.
Rear wheel
1,000 N
(102 kgf, 225 lb)
or more
500 N 500 N
(51 kgf, 112 lb)
or less or less