Subaru LEGACY 2003 Service Manual page 235

DIAGNOSTICS CHART WITH SELECT MONITOR
Step
1 CHECK THE STEERING WHEEL.
1) Drive the vehicle on a flat road.
2) Stop the vehicle in a straight line.
3) Check the angle of steering wheel.
Is the measured value less than the speci-
fied value?
2 CHECK OUTPUT OF STEERING ANGLE
SENSOR USING SELECT MONITOR.
1) Select "Current data display & Save" on the
select monitor.
2) Read steering angle sensor output on the
select monitor display.
Does the steering angle sensor output
(value) change on the monitor display when
the steering wheel is turned in either direc-
tion?
3 CHECK RUNNING FIELD.
Check if the vehicle was driven on banked
road surfaces or sandy surfaces (not dirt road
surfaces).
Was the vehicle driven on banked road sur-
faces or sandy surfaces (not dirt road sur-
faces)?
4 CHECK VDCCM.
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?
5 CHECK ANY OTHER DIAGNOSTIC TROU-
BLE CODES APPEARANCE.
Are other diagnostic trouble codes being out-
put?
Value
5°
Change
Driven.
Same DTC indicated.
Other DTC indicated.
VDC-233
VDC (DIAGNOSTICS)
Yes
Go to step 2. Perform centering
alignment of steer-
ing.
Go to step 3. Replace steering
angle sensor.
Driving on banked Go to step 4.
road surfaces or
sandy surfaces
(not dirt road sur-
faces) sometimes
results in a
VDCCM memory
trouble code.
Replace VDCCM. Go to step 5.
<Ref. to VDC-8,
VDC Control Mod-
ule (VDCCM).>
Proceed with the A temporary poor
diagnosis corre- contact.
sponding to the
diagnostic trouble
code.
No