Subaru Legacy (2005 year). Service manual — part 788
VDC(diag)-17
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Subaru Select Monitor
etc.) on the occurrence of a problem, the DTC
which is suffixed with a question mark “?” appears
on the Subaru Select Monitor display. This shows it
may be an unreliable reading.
10) If VDC and Subaru Select Monitor cannot com-
municate, check the communication circuit. <Ref.
to VDC(diag)-20, COMMUNICATION FOR INI-
TIALIZING IMPOSSIBLE, INSPECTION, Subaru
Select Monitor.>
Display
Contents to be monitored
Current
Indicate the latest DTC on the Subaru
Select Monitor display.
Old
Indicate the latest DTC in previous trou-
ble on the Subaru Select Monitor display.
Older
Indicate the latest DTC in second previ-
ous trouble on the Subaru Select Monitor
display.
Before 3
Indicate the latest DTC in third previous
trouble on the Subaru Select Monitor dis-
play.
VDC(diag)-18
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Subaru Select Monitor
2. READ CURRENT DATA
1) On the «Main Menu» display screen, select the {Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display screen, select the {Brake Control} and press the [YES] key.
3) Press the [YES] key after the {VDC} is displayed.
4) On the «Brake Control Diagnosis» display screen, select the {Current Data Display/Save}, and then press
the [YES] key.
5) On the «Data Display Menu» display screen, select the data display method, and press the [YES] key.
6) Using a 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 details concerning operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MAN-
UAL.
Display
Contents to be monitored
Unit of measure
FR Wheel Speed
Wheel speed detected by front ABS wheel speed sensor RH is dis-
played.
km/h or MPH
FL Wheel Speed
Wheel speed detected by front ABS wheel speed sensor LH is dis-
played.
km/h or MPH
RR Wheel Speed
Wheel speed detected by rear ABS wheel speed sensor RH is dis-
played.
km/h or MPH
RL Wheel Speed
Wheel speed detected by rear ABS wheel speed sensor LH is dis-
played.
km/h or MPH
Steering Angle Sensor
Steering angle detected by steering angle sensor is displayed.
deg
Yaw Rate Sensor
Vehicle angular speed detected by yaw rate sensor is displayed.
deg/s
Pressure Sensor
Brake fluid pressure detected by pressure sensor is displayed.
bar
Lateral G Sensor
Vehicle lateral acceleration detected by lateral G sensor is dis-
played.
m/s (m/s
2
)
IG power supply voltage
Voltage supplied to VDCCM&H/U is displayed.
V
EAM signal
Engine control command signal is displayed.
1 or 0
TCS Operation Light
TCS operation condition is displayed.
ON or OFF
VDC Operation Light
VDC operation condition is displayed.
ON or OFF
VDC OFF Light
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
VDC OK-B signal
Malfunction of VDC sensor (except for vehicle speed sensor) is
displayed.
1 or 0
Valve Relay Signal
Valve relay operation signal is displayed.
ON or OFF
Motor Relay Signal
Motor relay operation signal is displayed.
ON or OFF
Motor Relay Monitor
Motor relay monitor signal is displayed.
ON or OFF
PATA Signal
Operation condition of VDC OFF switch is displayed.
ON or OFF
BLS Signal
Brake ON/OFF is displayed.
ON or OFF
Gear position
Present gear position is displayed.
—
Engine Speed
Current engine speed is displayed.
rpm
PW Signal
Acceleration opening is displayed.
%
VDC(diag)-19
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Subaru Select Monitor
3. CLEAR MEMORY MODE
1) On the «Main Menu» display screen, select the
{2. Each System Check} and press the [YES] key.
2) On the «System Selection Menu» display
screen, select the {Brake Control} and press the
[YES] key.
3) Press the [YES] key after the {VDC} is displayed.
4) On the «Brake Control Diagnosis» display
screen, select the {Clear Memory} and press the
[YES] key.
5) When “Done” and “Turn ignition switch OFF” are
shown on the display screen, turn the Subaru Se-
lect Monitor power switch and ignition switch to
OFF.
NOTE:
For details concerning operation procedure, refer
to the SUBARU SELECT MONITOR OPERATION
MANUAL.
4. ABS SEQUENCE CONTROL
5. FREEZE FRAME DATA
NOTE:
• Data stored at the time of trouble occurrence is
shown on display.
• Each time 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 VDC control module pow-
er supply, etc.), the DTC which is suffixed with a
question mark “?” appears on the Subaru Select
Monitor display. This shows it may be an unreliable
reading.
Display
Contents to be monitored
Clear Memory?
DTC deleting function
Display
Contents to be monitored
Reference tar-
get
ABS
sequence
control
Operate the valve and
pump motor continuously
to perform the ABS
sequence control.
<Ref. to ABS-
10, ABS
Sequence Con-
trol.>
VDC confir-
mation
mode
Operate the valve and
pump motor continuously
to perform the VDC
sequence control.
<Ref. to VDC-
12, VDC
Sequence Con-
trol.>
Display
Contents to be monitored
Steering angle
sensor
Steering angle detected by steering
angle sensor is displayed.
Yaw rate sensor
Vehicle angular speed detected by yaw
rate sensor is displayed.
Lateral G sensor
Vehicle lateral acceleration detected by
lateral G sensor is displayed.
Pressure sensor
Brake fluid pressure detected by pres-
sure sensor is displayed.
Vehicle Speed
Vehicle speed calculated by VDC control
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.
Required torque
Engine required torque is displayed.
Current torque
Current engine torque on malfunction
occurrence is displayed.
Target torque
Engine target torque is displayed.
PW signal
Acceleration opening is displayed.
Engine Speed
Engine speed on malfunction occur-
rence is displayed.
Gear position
Gear position on malfunction occurrence
is displayed.
IG power supply
voltage
Voltage supplied to VDC control module
is displayed.
Absolute angle
recognition flag
Whether the absolute angle was deter-
mined is displayed.
Decreasing
required torque
Whether the torque decrease is required
to engine is displayed.
EAM signal
Engine control command signal is dis-
played.
VDC O control
flag
VDC oversteer control condition is dis-
played.
VDC U control
flag
VDC understeer control condition is dis-
played.
BMR control flag
Brake control condition is displayed.
AMR control flag
Engine control condition is displayed.
ABS control flag
ABS control condition is displayed.
VDC OFF light
ON/OFF condition of VDC OFF indicator
light is displayed.
Valve Relay Sig-
nal
Valve relay operation signal is displayed.
Motor Relay
Monitor
Motor relay monitor signal is displayed.
BLS signal
Brake ON/OFF is displayed.
VDC(diag)-20
VEHICLE DYNAMICS CONTROL (VDC) (DIAGNOSTICS)
Subaru Select Monitor
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:
VDC00297
MAIN SBF
SBF-6
No.33
B310
E
E
26
6
14
VDCCM & H/U
B310
B40
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16
1 2 3 4
11 12 13 14
27 28 29 30
15 16 17 18
31 32 33 34
19 20 21 22
35 36 37 38
23 24 25 26
39 40 41 42
5
6
7
8
9
10
BATTERY
IGNITION
SWITCH
DATA LINK
CONNECTOR
B40
10
1
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