Subaru LEGACY 2006 Manual page 4269

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VDC Control Module and Hydraulic Control Unit (VDCCM&H/U)
14) When the hydraulic unit begins to work, first the
RR side performs compression, hold, and decom-
pression, and then the RL side performs compres-
sion, hold, and decompression.
15) Read the values indicated on the pressure
gauges and check if it is within specification. De-
press the brake pedal and check that it is not abnor-
mally 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 wheels other than the one to measure free
rollers.
2) Prepare to operate the VDC sequence control.
<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 the "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 work sequence.
(1) The FL wheel performs compression, hold
and decompression in sequence, and subse-
quently the FR wheel repeats the cycle.
(2) The RR wheel performs compression, hold
and decompression in sequence, and subse-
quently 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 specifica-
tion.
When pressurized
When depressur-
ized
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 are performed, be sure to perform the
centering of the 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
ABS00136
• Wheel alignment adjustment
1) Park the vehicle straight on a level surface. (En-
gine operation in the "P" or "N" range)
2) Check that steering wheel is positioned at the
center. (When the center position is not correct, ad-
just the wheel alignment.)
3) Set the Subaru Select Monitor to the vehicle,
and select {Set up mode for Neutral of Steering An-
gle Sensor & Lateral G Sensor 0 point} in the
(1)
"Function check sequence" screen. (Follow the
steps on the display.)
ABS00137
4) On the "Brake Control System" display screen,
select {Current Data Display & Save}, and check
that the steering angle sensor shows "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 there is no unnecessary VDC opera-
tion or steering control loss. If there is a problem,
repeat the steps above.
VDC-9
VEHICLE DYNAMICS CONTROL (VDC)
Front wheel Rear wheel
2,000 N 2,000 N
(203 kgf, 447 lb) (203 kgf, 447 lb)
or more or more
500 N 500 N
(51 kgf, 112 lb) (51 kgf, 112 lb)
or less or less