Subaru Legacy 2002 Service Manual page 2696

DIAGNOSTICS CHART WITH SELECT MONITOR
No.
1 CHECK RUNNING FIELD.
Check if the vehicle was driven on banked
road surfaces or sandy surfaces (not dirt road
surfaces).
2 CHECK INSTALLATION OF YAW RATE AND
LATERAL G SENSOR.
Check installation of yaw rate and lateral G
sensor.
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.
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.
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.
6 CHECK ANY OTHER DIAGNOSTIC
TROUBLE CODES APPEARANCE.
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.
8 CHECK ANY OTHER DIAGNOSTIC
TROUBLE CODES APPEARANCE.
Step
Was the vehicle driven on
banked road surfaces or
sandy surfaces (not dirt
road surfaces)?
Is the yaw rate and lateral
G sensor fixed securely?
Is the yaw rate and lateral
G sensor output on monitor
display 0±5.25 deg/s?
Is the steering angle sen-
sor output on monitor dis-
play 0±2.5 deg?
Is the same diagnostic
trouble code as in the cur-
rent diagnosis still being
output?
Are other diagnostic trouble
codes being output?
Is the same diagnostic
trouble code as in the cur-
rent diagnosis still being
output?
Are other diagnostic trouble
codes being output?
VDC-237
Check Yes
Driving on banked
road surfaces or
sandy surfaces
(not dirt road sur-
faces) sometimes
results in a
VDCCM memory
diagnostic trouble
code.
Go to step 3.
Go to step 4.
Go to step 5.
Go to step 6.
Proceed with the
diagnosis corre-
sponding to the
diagnostic trouble
code.
Replace VDCCM.
<Ref. to VDC-9,
VDC Control Mod-
ule (VDCCM).>
Proceed with the
diagnosis corre-
sponding to the
diagnostic trouble
code.
VDC (Diagnostics)
No
Go to step 2.
Install yaw rate
and lateral G sen-
sor securely.
Replace yaw rate
and lateral G sen-
sor. <Ref. to VDC-
22, Yaw Rate and
Lateral G Sen-
sor.>
Perform centering
alignment of
steering wheel.
Go to step 7.
A temporary poor
contact.
Go to step 8.
The original yaw
rate and lateral G
sensor has been
faulty.