Subaru LEGACY 2003 Service Manual page 241

DIAGNOSTICS CHART WITH SELECT MONITOR
Step
1 CHECK RUNNING FIELD.
Was the vehicle driven on banked road sur-
faces or sandy surfaces (not dirt road sur-
faces)?
2 CHECK INSTALLATION OF YAW RATE AND
LATERAL G SENSOR.
Check installation of yaw rate and lateral G
sensor.
Is the yaw rate and lateral G sensor fixed
securely?
3 CHECK OUTPUT OF YAW RATE AND LAT-
ERAL G SENSOR USING SELECT MONI-
TOR.
1) Drive the vehicle on a flat road.
2) Stop the vehicle in a straight line.
3) Select "Current data display & Save" on the
select monitor.
4) Read yaw rate and lateral G sensor output
on the select monitor display.
Is the measured value within the specified
range?
4 CHECK OUTPUT OF STEERING ANGLE
SENSOR USING SELECT MONITOR.
1) Drive the vehicle on a flat road.
2) Stop the vehicle in a straight line.
3) Select "Current data display & Save" on the
select monitor.
4) Read steering angle sensor output on the
select monitor display.
Is the measured value within the specified
range?
5 CHECK YAW RATE AND LATERAL G SEN-
SOR.
1) Turn ignition switch to OFF.
2) Connect all connectors.
3) Erase the memory.
4) Perform inspection mode.
5) Read out the diagnostic trouble code.
Is the same diagnostic trouble code as in
the current diagnosis still being output?
6 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES APPEARANCE.
Are other diagnostic trouble codes being out-
put?
7 CHECK VDCCM.
1) Turn ignition switch to OFF.
2) Replace yaw rate and lateral G sensor.
3) Erase the memory.
4) Perform inspection mode.
5) Read out the diagnostic trouble code.
Is the same diagnostic trouble code as in
the current diagnosis still being output?
Value
Driven.
Fixed securely.
0±5.25 deg/s
0±2.5 deg
Same DTC indicated.
Other DTC indicated.
Same DTC indicated.
VDC-239
VDC (DIAGNOSTICS)
Yes
Driving on banked Go to step 2.
road surfaces or
sandy surfaces
(not dirt road sur-
faces) sometimes
results in a
VDCCM memory
diagnostic trouble
code.
Go to step 3. Install yaw rate
and lateral G sen-
sor securely.
Go to step 4. Replace yaw rate
and lateral G sen-
sor. <Ref. to VDC-
22, Yaw Rate and
Lateral G Sensor.>
Go to step 5. Perform centering
alignment of steer-
ing wheel.
Go to step 6. Go to step 7.
Proceed with the A temporary poor
diagnosis corre- contact.
sponding to the
diagnostic trouble
code.
Replace VDCCM. Go to step 8.
<Ref. to VDC-8,
VDC Control Mod-
ule (VDCCM).>
No