Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 518
VEHICLE DYNAMICS CONTROL (VDC)
VDC
Page
General Description . . . . . . . . . . . . . . . . . . . . ...2
Vehicle Dynamics Control System . . . . . . . . . . . . . . . .7
VDC Control Module and Hydraulic Control Unit (VDCCM&H/U) . . . ..8
ABS Sequence Control . . . . . . . . . . . . . . . . . . . 14
VDC Sequence Control . . . . . . . . . . . . . . . . . . . 17
Yaw Rate and G Sensor . . . . . . . . . . . . . . . . . . ..20
Steering Angle Sensor . . . . . . . . . . . . . . . . . . . .22
Front ABS Wheel Speed Sensor . . . . . . . . . . . . . . . ..24
Rear ABS Wheel Speed Sensor . . . . . . . . . . . . . . . ..26
Front Magnetic Encoder . . . . . . . . . . . . . . . . . . ...27
Rear Magnetic Encoder . . . . . . . . . . . . . . . . . . ...28
VDC OFF Switch . . . . . . . . . . . . . . . . . . . . . ..29
VDC-2
General Description
VEHICLE DYNAMICS CONTROL (VDC)
1. General Description
A: SPECIFICATION
Item
Specification or identification
ABS wheel speed sensor
ABS wheel speed sensor gap
(for reference)
Front
0.77 — 1.43 mm (0.030 — 0.056 in)
Rear
0.43 — 1.78 mm (0.017 — 0.070 in)
Identifications of harness
(marks, color)
Front
RH
K1 (white)
LH
K2 (yellow)
Rear
RH
P5 (white)
LH
P6 (yellow)
VDCCM&H/U identification
STI model
ST
Except for STI model
SR
VDC-3
General Description
VEHICLE DYNAMICS CONTROL (VDC)
B: COMPONENT
1. ABS WHEEL SPEED SENSOR
(1)
Front ABS wheel speed sensor
(4)
Hub unit bearing
Tightening torque: N·m (kgf-m, ft-lb)
(2)
Front housing
(5)
Magnetic encoder
T1: 7.5 (0.76, 5.5)
(3)
Rear ABS wheel speed sensor
T2: 33 (3.36, 24.3)
VDC00520
(2)
(4)
(5)
(3)
T1
T2
(1)
T1
T1
VDC-4
General Description
VEHICLE DYNAMICS CONTROL (VDC)
2. YAW RATE & G SENSOR
3. STEERING ANGLE SENSOR
(1)
Yaw rate & G sensor
(2)
Bracket
Tightening torque: N·m (kgf-m, ft-lb)
T: 7.5 (0.76, 5.5)
VDC00447
(1)
(2)
T
T
(1) Steering angle sensor
VDC00196
(1)
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