Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. 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

TOOL, General Description.>

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

Select Monitor.>

9) Record the DTC and data.

EN-05692

EN-06148