Subaru Legacy IV (2008 year). Manual - part 925

VDC(diag)-15

Subaru Select Monitor

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

2. READ CURRENT DATA

1) On the «Main Menu» display, select the {Each System Check}.
2) On the «System Selection Menu» display, select the {Brake Control System}.
3) Click the [OK] button after the {VDC} is displayed.
4) On the «Brake Control Diagnosis» display, select the {Current Data Display & Save}.
5) On the «Data Display Menu» display, select the data display method.
6) Using the scroll key, scroll the display screen up or down until necessary data is shown.
• A list of the support data is shown in the following table.

NOTE:
For detailed operation procedure, refer to the “PC application help for Subaru Select Monitor”.

3. FUNCTION CHECK

Display

Contents to be displayed

Unit of measure

FR Wheel Speed

Wheel speed detected by front ABS wheel speed sensor RH is displayed.

km/h or MPH

FL Wheel Speed

Wheel speed detected by front ABS wheel speed sensor LH is displayed.

km/h or MPH

RR Wheel Speed

Wheel speed detected by rear ABS wheel speed sensor RH is displayed.

km/h or MPH

RL Wheel Speed

Wheel speed detected by rear ABS wheel speed sensor LH is displayed.

km/h or MPH

Steering Angle Sensor Op

Steering angle detected by steering angle sensor is displayed.

deg

Yaw Rate Sensor Output

Vehicle angular speed detected by yaw rate sensor is displayed.

deg/s

Pressure Sensor Output

Brake fluid pressure detected by pressure sensor is displayed.

bar

Lateral G Sensor output

Vehicle lateral acceleration detected by lateral G sensor is displayed.

m/s (m/s

2

)

ABS_CM Power Voltage

Voltage supplied to VDCCM&H/U is displayed.

V

E/G Control Stop Flag

Engine control command signal is displayed.

1 or 0

ABS Control Flag

ABS operation condition is displayed.

ON or OFF

EBD Control Flag

EBD operation condition is displayed.

ON or OFF

TCS Control Flag

TCS operation condition is displayed.

ON or OFF

VDC Control Flag

VDC operation condition is displayed.

ON or OFF

OFF Lamp

ON/OFF condition of VDC OFF indicator light is displayed.

ON or OFF

EBD Warning Light

ON operation of the EBD warning light is displayed.

ON or OFF

ABS Warning Light

ON operation of the ABS warning light is displayed.

ON or OFF

VDC Warning Light

ON operation of the VDC warning light is displayed.

ON or OFF

Valve Relay Signal

Valve relay operation signal is displayed.

ON or OFF

Motor Relay Signal

Motor relay operation signal is displayed.

ON or OFF

M. Relay monitor Voltage

Voltage applied to the motor relay is displayed.

V

OFF SW Signal

Operation condition of VDC OFF switch is displayed.

ON or OFF

Brake Switch

Brake ON/OFF is displayed.

ON or OFF

Display

Contents of display

Index No.

ABS Sequence Control Mode

Operate the valve and pump motor continuously 
to perform the ABS sequence control.

<Ref. to ABS-10, ABS Sequence Control.>

VDC Check Mode

Operate the valve and pump motor continuously 
to perform the VDC sequence control.

<Ref. to VDC-13, VDC Sequence Control.>

Set mode Str. 
A.Sen.N&Lat.GSen.0p

Set the steering angle sensor neutral position 
and the lateral G sensor “0” point.

<Ref. to VDC-18, Steering Angle Sensor.>

VDC(diag)-16

Subaru Select Monitor

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

4. FREEZE FRAME DATA

NOTE:
• Data stored at the time of trouble occurrence is
shown on display.
• Each time a trouble occurs, the latest information
is stored in the freeze frame data in memory.
• If a freeze frame data is not properly stored in
memory (due to a drop in VDCCM power supply,
etc.), a DTC suffixed with a question mark “?” will
appear on the Subaru Select Monitor display. This
shows it may be an unreliable reading.

5. PARAMETER SELECTION

CAUTION:
• Subaru Select Monitor is required for param-
eter selection.
• This function can be used for the replace-
ment VDCCM&H/U and VDCCM.

NOTE:
• When a VDCCM is replaced with a replacement,
use this function to select and register parameters
to the VDCCM.
• For confirmation of applied models, refer to the
“Model number plate” attached to the vehicles.
<Ref. to ID-2, IDENTIFICATION, Identification.>
• If a wrong applied model is written, it can be re-
written.
• When no data is registered, ABS/EBD/VDC
warning light illuminates and the DTC “Parameter
selection error” is detected.
1) Connect the Subaru Select Monitor.
2) On the «Main Menu» display, select the {Each
System Check}.
3) On the «System Selection Menu» display, select
the {Brake Control System}.
4) Click the [OK] button after the {VDC} is dis-
played.
5) On the «Brake Control Diagnosis» display, se-
lect the {Selection of Parameter}.
6) Check the applied model indicated in the “Model
number plate”. <Ref. to ID-2, IDENTIFICATION,
Identification.>
7) Enter the applied model of 7-digit alphanumeric
characters and press the [Enter] key.
8) When the confirmation screen indicating the ve-
hicle information appears, check that the correct
applied model and grade are displayed and click
the [OK] button.

NOTE:
When the displayed applied model and grade are
different from those of the vehicle, perform registra-
tion operations again after clicking the [OK] button.
9) Execute Clear Memory after parameter selec-
tion and registration operations because the DTC
for “Parameter selection error” is memorized.

Display

Contents to be displayed

Steering Angle 
Sensor Op

Steering angle detected by steering 
angle sensor is displayed.

Yaw Rate Sensor 
Output

Vehicle angular speed detected by yaw 
rate sensor is displayed.

Lateral G Sensor 
output

Vehicle lateral acceleration detected by 
lateral G sensor is displayed.

Pressure Sensor 
Output

Brake fluid pressure detected by pres-
sure sensor is displayed.

Vehicle Speed

Vehicle speed calculated by VDC con-
trol module is displayed.

FR Wheel Speed

Wheel speed detected by front ABS 
wheel speed sensor RH is displayed in 
km/h or MPH.

FL Wheel Speed

Wheel speed detected by front ABS 
wheel speed sensor LH is displayed in 
km/h or MPH.

RR Wheel Speed

Wheel speed detected by rear ABS 
wheel speed sensor RH is displayed in 
km/h or MPH.

RL Wheel Speed

Wheel speed detected by rear ABS 
wheel speed sensor LH is displayed in 
km/h or MPH.

Accel. Opening 
Angle

Acceleration opening is displayed.

Engine Speed

Engine speed on malfunction occur-
rence is displayed.

Gear Position

Gear position on malfunction occur-
rence is displayed.

ABS_CM Power 
Voltage

Voltage supplied to VDC control module 
is displayed.

Steering angle 
flag

Whether the absolute angle of the 
steering angle sensor was determined 
is displayed.

E/G Control Stop 
Flag

Engine control command signal is dis-
played.

VDC Control Flag

VDC control condition is displayed.

EBD Control Flag

EBD control condition is displayed.

TCS Control Flag

TCS control condition is displayed.

ABS Control Flag

ABS control condition is displayed.

OFF Switch 
Detection

ON/OFF condition of the VDC operated 
by the driver is displayed.

Brake Switch

Brake ON/OFF is displayed.

VDC(diag)-17

Subaru Select Monitor

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

6. PARAMETER CHECK

NOTE:
The parameter data registered in the VDCCM is
shown on the display.
1) Connect the Subaru Select Monitor.
2) On the «Main Menu» display, select the {Each
System Check}.
3) On the «System Selection Menu» display, select
the {Brake Control System}.
4) Click the [OK] button after the {VDC} is dis-
played.
5) On the «Brake Control Diagnosis» display, se-
lect the {Confirm on parameter}.
6) On the {Confirm on parameter} display screen,
check that the applied model and grade of the tar-
get vehicle are included, and click the [OK] button.
7) If the applied model and grade of the target ve-
hicle are not included on the {Confirm on parame-
ter} display screen, perform parameter selection
and registration. <Ref. to VDC(diag)-16, PARAME-
TER SELECTION, OPERATION, Subaru Select
Monitor.>

VDC(diag)-18

Subaru Select Monitor

VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)

B: INSPECTION

1. COMMUNICATION FOR INITIALIZING IMPOSSIBLE

DETECTING CONDITION:
Defective harness connector
TROUBLE SYMPTOM:
Communication is impossible between VDC and Subaru Select Monitor.
WIRING DIAGRAM:

7

28

MAIN SBF

SBF-6

F/B

No.33

M/B

No.13

B310

VDCCM & H/U

E

25

B40

7

16

E

B310

4 5 6 7 8 9

26 27 28 29 30

2 3

1

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

23

24

22

25

VDC00498

B40

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

BATTERY

IGNITION
SWITCH

DATA LINK 
CONNECTOR