Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual - part 521
VDC-13
VDC Control Module and Hydraulic Control Unit (VDCCM&H/U)
VEHICLE DYNAMICS CONTROL (VDC)
9) Using a TORX
®
bit E5, attach/tighten new
screws in the order of (1) through (4).
CAUTION:
Always use new screws.
Tightening torque:
1.5 N·m (0.15 kgf-m, 1.1 ft-lb)
10) Check that there is no foreign matter in mating
surface between the VDCCM&H/U.
11) Using a TORX
®
bit E5, tighten the screws in the
order of (1) through (4) again.
Tightening torque:
3 N·m (0.31 kgf-m, 2.2 ft-lb)
12) Check that there is no gap in the mating sur-
face between VDCCM&H/U.
13) Install the VDCCM&H/U to the vehicle.
14) Bleed air from the brake system. <Ref. to BR-
15) Perform the selection · registration operation of
parameter. <Ref. to VDC(diag)-21, PARAMETER
SELECTION, OPERATION, Subaru Select Moni-
tor.>
NOTE:
• After replacing the VDCCM, be sure to perform
the selection · registration operation of parameter.
• For the selection and registration of parameter,
the Subaru Select Monitor is required.
• When the registration has not been performed,
the DTC code “Parameter selection error” is detect-
ed together with the ABS/EBD/VDC warning light il-
lumination.
16) Check the parameter to confirm that the ap-
plied models and grades of the relevant vehicle are
included. <Ref. to VDC(diag)-21, PARAMETER
CHECK, OPERATION, Subaru Select Monitor.>
17) If the applied models and grades of the relevant
vehicle are not included, perform the selection ·
registration operation of parameter with the {Con-
firm on parameter} screen again. <Ref. to VDC(di-
ag)-21, PARAMETER SELECTION, OPERATION,
18) Execute Clear Memory after parameter selec-
tion and registration operations because the DTC
for “Parameter selection error” is memorized.
E: 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 & G sensor.
• VDCCM&H/U
• Steering angle sensor
• Yaw rate & G sensor
• Steering wheel parts (Including airbag)
• Suspension parts
• Wheel alignment adjustment
1) Park the vehicle straight on a level surface. (With
engine operating in the “Neutral” 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 the {Set mode Str.A.Sen.N&Lat.GS-
en.0p} in the «Function Check Sequence» screen.
(Follow the steps on the display.)
4) On «Brake Control System» display, select {Cur-
rent 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 malfunc-
tion, repeat the steps above.
ABS00432
(4)
(2)
(1)
(3)