Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 529
VDC(diag)-15
Control Module I/O Signal
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Contents
Terminal No.
(+) — (–)
Input/Output signal
Measured value and measuring conditions
Power supply
28 — 25
10 — 15 V when the ignition switch is ON.
ABS wheel speed
sensor
Front LH wheel
Power supply
26 — 25
4.5 — 16.5 V
Signal
1
5.9 — 16.8 mA: Rectangle waveform
Front RH wheel
Power supply
5 — 25
4.5 — 16.5 V
Signal
6
5.9 — 16.8 mA: Rectangle waveform
Rear LH wheel
Power supply
2 — 25
4.5 — 16.5 V
Signal
27
5.9 — 16.8 mA: Rectangle waveform
Rear RH wheel
Power supply
3 — 25
4.5 — 16.5 V
Signal
4
5.9 — 16.8 mA: Rectangle waveform
CAN communication line (+)
35
2.5 — 1.5 V pulse signal
CAN communication line (–)
10
3.5 — 2.5 V pulse signal
Valve relay power supply
24 — 25
10 — 15 V when the ignition switch is ON.
Motor relay power supply
23 — 22
10 — 15 V when the ignition switch is ON.
Stop light switch
30 — 25
1.5 V or less when the stop light is OFF; otherwise,
10 — 15 V when the stop light is ON.
Subaru Select Monitor
7 — 25
0 ←→ 12 V pulse (in communication)
Vehicle speed output signal
33
0 ←→ 5 V pulse
VDC OFF switch
31 — 25
1 Ω or less when the switch is ON; 1 MΩ or more
when the switch is OFF.
Ground
25
—
VDC(diag)-16
Control Module I/O Signal
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
B: WIRING DIAGRAM
(3)
(7)
(6)
(5)
(11)
M
(12)
(13)
(20)
(2)
(24)
(23)
(22)
(4)
(28)
(1)
(29)
(37)
(14)
(8)
(9)
(10)
(15)
(16)
(17)
(18)
(21)
(33)
(32)
(31)
(42)
(27)
(43)
(30)
(34)
(35)
(38)
(39)
(40)
(41)
(26)
(25)
(19)
(36)
VDC00681
VDC(diag)-17
Control Module I/O Signal
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
(1)
Battery
(16) Primary cut solenoid valve
(31) Body integrated unit
(2)
Ignition switch
(17) Primary suction solenoid valve
(32) Engine control module (ECM)
(3)
VDC control module and hydraulic
control unit (VDCCM&H/U)
(18) Secondary cut solenoid valve
(33) Driver’s control center differential
control module (6MT model only)
(4)
VDC control module
(19) Secondary suction solenoid valve
(34) Steering angle sensor
(5)
Valve relay
(20) Data link connector
(35) Yaw rate & G sensor
(6)
Motor relay
(21) VDC OFF switch
(36) Pressure sensor
(7)
Motor
(22) Combination meter
(37) Front ABS wheel speed sensor LH
(8)
Front inlet solenoid valve LH
(23) VDC OFF & VDC traction mode
indicator light (6MT model)
VDC OFF indicator light (5MT
model)
(38) Front ABS wheel speed sensor
RH
(9)
Front outlet solenoid valve LH
(24) VDC warning light & VDC indica-
tor light
(39) Rear ABS wheel speed sensor LH
(10) Front inlet solenoid valve RH
(25) ABS warning light
(40) Rear ABS wheel speed sensor
RH
(11) Front outlet solenoid valve RH
(26) Brake warning light (EBD warning
light)
(41) Hill start assist warning light
(12) Rear inlet solenoid valve LH
(27) Parking brake switch
(42) Back-up light switch
(13) Rear outlet solenoid valve LH
(28) Brake fluid level switch
(43) Clutch switch
(14) Rear inlet solenoid valve RH
(29) Stop light and brake switch
(15) Rear outlet solenoid valve RH
(30) Stop light
VDC(diag)-18
Subaru Select Monitor
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
6. Subaru Select Monitor
A: OPERATION
1. HOW TO USE SUBARU SELECT MONI-
TOR
1) Prepare the Subaru Select Monitor kit. <Ref. to
VDC(diag)-11, SPECIAL TOOL, PREPARATION
2) Prepare PC with Subaru Select Monitor in-
stalled.
3) Connect the USB cable to SDI (Subaru Diagno-
sis Interface) and USB port on the personal com-
puter (dedicated port for the Subaru Select
Monitor).
NOTE:
The dedicated port for the Subaru Select Monitor
means the USB port which was used to install the
Subaru Select Monitor.
4) Connect the diagnosis cable to SDI.
5) Connect SDI to data link connector located in the
lower portion of the instrument panel (on the driv-
er’s side).
CAUTION:
Do not connect the scan tools other than the
Subaru Select Monitor.
6) Start the PC.
7) Turn the ignition switch to ON (engine OFF) and
run the “PC application for Subaru Select Monitor”.
NOTE:
For detailed operation procedures, refer to “PC ap-
plication help for Subaru Select Monitor”.
8) If VDC and Subaru Select Monitor cannot com-
municate, check the communication circuit. <Ref.
to VDC(diag)-22, COMMUNICATION FOR INI-
TIALIZING IMPOSSIBLE, INSPECTION, Subaru
9) Record the DTC and data.
EN-05692
EN-06148
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