Subaru Legacy IV (2008 year). Manual - part 924

VDC(diag)-11

Control Module I/O Signal

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

5. Control Module I/O Signal

A: ELECTRICAL SPECIFICATION

NOTE:
• Terminal numbers in VDCCM&H/U connector are shown in the figure.
• When the connector is removed from VDCCM&H/U, the ABS warning light, VDC warning light and VDC
OFF indicator light illuminate.

VDC00457

B310

4 5 6 7 8 9

26 27 28 29 30

2 3

31 32 33 34 35 36

10 11

14 15 16 17 18 19

37 38 39 40

12 13

41 42 43 44 45 46

20 21

VDC(diag)-12

Control Module I/O Signal

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

Content

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

5.9 — 16.8 mA: Rectangle waveform

Front RH wheel

Power supply

5 — 25

4.5 — 16.5 V

Signal

5.9 — 16.8 mA: Rectangle waveform

Rear LH wheel

Power supply

2 — 25

4.5 — 16.5 V

Signal

5.9 — 16.8 mA: Rectangle waveform

Rear RH wheel

Power supply

3 — 25

4.5 — 16.5 V

Signal

5.9 — 16.8 mA: Rectangle waveform

CAN communication line (+)

2.5 — 1.5 V pulse signal

CAN communication line (–)

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.

ABS warning light

32 — 25

After turning the ignition switch to ON, 10 — 15 V during

1.5 seconds, and 1.5 V or less after 1.5 seconds passed.

Brake warning light (EBD warning light)

8 — 25

After turning the ignition switch to ON, 10 — 15 V during

1.5 seconds, and 1.5 V or less after 1.5 seconds passed.

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

mo 12 V pulse (in communication)

Vehicle speed output signal

mo 12 V pulse

Ground

—

VDC(diag)-13

Control Module I/O Signal

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

B: WIRING DIAGRAM

(1)

Battery

(14)

Rear inlet solenoid valve RH

(27)

Parking brake switch

(2)

Ignition switch

(15)

Rear outlet solenoid valve RH

(28)

Brake fluid level switch

(3)

VDC control module and hydraulic
control unit (VDCCM&H/U)

(16)

Primary cut solenoid valve

(29)

Stop light switch

(17)

Primary suction solenoid valve

(30)

Stop light

(4)

VDC control module

(18)

Secondary cut solenoid valve

(31)

Body integrated unit

(5)

Valve relay

(19)

Secondary suction solenoid valve

(32)

Engine control module (ECM)

(6)

Motor relay

(20)

Data link connector

(33)

Transmission control module (TCM)

(7)

Motor

(21)

VDC OFF switch

(34)

Steering angle sensor

(8)

Front inlet solenoid valve LH

(22)

Combination meter

(35)

Yaw rate & lateral G sensor

(9)

Front outlet solenoid valve LH

(23)

VDC indicator light

(36)

Pressure sensor

(10)

Front inlet solenoid valve RH

(24)

VDC warning light and VDC OFF
indicator light

(37)

Front ABS wheel speed sensor LH

(11)

Front outlet solenoid valve RH

(38)

Front ABS wheel speed sensor RH

(12)

Rear inlet solenoid valve LH

(25)

ABS warning light

(39)

Rear ABS wheel speed sensor LH

(13)

Rear outlet solenoid valve LH

(26)

Brake warning light

(40)

Rear ABS wheel speed sensor RH

(3)

(7)

(6)

(5)

(11)

(12)

(13)

(20)

(2)

(24)

(23)

(22)

(4)

(28)

(1)

(29)

(30)

(37)

(14)

(8)

(9)

(10)

(15)

(16)

(17)

(18)

(21)

(33)

(32)

(31)

(34)

(35)

(38)

(39)

(40)

(27)

(26)

(25)

(19)

(36)

VDC00458

VDC(diag)-14

Subaru Select Monitor

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

6. Subaru Select Monitor

A: OPERATION

1. HOW TO USE SUBARU SELECT MONITOR

1) Prepare the Subaru Select Monitor kit. <Ref. to
VDC(diag)-8, SPECIAL TOOL, PREPARATION
TOOL, General Description.>

2) Prepare PC with Subaru Select Monitor in-
stalled.
3) Connect the USB cable between SDI (Subaru
Diagnosis Interface) and USB port on the personal
computer (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 scan tools other than the Suba-
ru 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 procedure, refer to the “PC
application help for Subaru Select Monitor”.

8) If VDC and Subaru Select Monitor cannot com-
municate, check the communication circuit. <Ref.
to VDC(diag)-18, COMMUNICATION FOR INI-
TIALIZING IMPOSSIBLE, INSPECTION, Subaru
Select Monitor.>

(1) Data link connector

EN-05692

ABS00465

(1)

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