Subaru Legacy 2002 Service Manual page 2582

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
No.
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.
2 CHECK RUNNING FIELD.
3 CHECK INSTALLATION OF YAW RATE AND
LATERAL G SENSOR.
Check installation of yaw rate and lateral G
sensor.
4 CHECK POWER SUPPLY OF YAW RATE
AND LATERAL G SENSOR.
1) Turn ignition switch OFF.
2) Disconnect connector from yaw rate and
lateral G sensor.
3) Turn ignition switch to ON.
4) Measure voltage between yaw rate and
lateral G sensor and chassis ground.
Connector & terminal
(R100) No. 3 — Chassis ground:
5 CHECK OUTPUT VOLTAGE OF VDCCM.
1) Turn ignition switch to OFF.
2) Disconnect connector from VDCCM.
3) Remove cover for VDCCM connector.
<Ref. to VDC-17, REMOVE, VDCCM Connec-
tor Cover.>
4) Connect connector to VDCCM.
5) Turn ignition switch to ON.
6) Measure voltage between VDCCM connec-
tor and chassis ground.
Connector & terminal
(F87) No. 63 — Chassis ground:
6 CHECK POOR CONTACT IN CONNEC-
TORS.
7 CHECK GROUND CIRCUIT OF YAW RATE
AND LATERAL G SENSOR.
Measure resistance between yaw rate and
lateral G sensor and chassis ground.
Connector & terminal
(R100) No. 6 — Chassis ground:
Step
Is the angle of steering
wheel within 5°?
Was the vehicle driven on
banked road surfaces or
sandy surfaces (not dirt
road surfaces) or surfaces
with holes or bumps at high
speeds?
Is the yaw rate and lateral
G sensor fixed securely?
Is the voltage between 10
and 15 V?
Is the voltage between 10
and 15 V?
Is there poor contact in
yaw rate and lateral G sen-
sor connector?
Is the resistance less than
0.5 Ω?
VDC-123
Check Yes
Go to step 2.
Driving on banked
road surfaces or
sandy surfaces
(not dirt road sur-
faces) or surfaces
with holes or
bumps at high
speeds, some-
times results in a
VDCCM memory
trouble code.
Go to step 4.
Go to step 7.
Repair harness
between yaw rate
and lateral G sen-
sor and VDCCM.
Repair or replace
VDCCM connec-
tor.
Go to step 10.
VDC (Diagnostics)
No
Perform centering
alignment of
steering.
Go to step 3.
Install yaw rate
and lateral G sen-
sor securely.
Go to step 5.
Go to step 6.
Replace VDCCM.
<Ref. to VDC-9,
VDC Control Mod-
ule (VDCCM).>
Go to step 8.