Subaru LEGACY 2003 Service Manual page 121

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
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 RUNNING FIELD.
Was the vehicle driven on banked road sur-
faces or sandy surfaces (not dirt road sur-
faces) or surfaces with holes or bumps at high
speeds?
3 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?
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 lat-
eral G sensor and chassis ground.
Connector & terminal
(R100) No. 3 ( + + + + ) — Chassis ground ( − − − − ):
Is the measured value within the specified
range?
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-19, REMOVE, VDCCM Con-
nector 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 ( − − − − ):
Is the measured value within the specified
range?
6 CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in yaw rate and lateral G
sensor connector?
Value
5°
Driven
Fixed securely.
10 — 15 V
10 — 15 V
There is poor contact.
VDC-119
VDC (DIAGNOSTICS)
Yes
Go to step 2. Perform centering
alignment of steer-
ing.
Driving on banked Go to step 3.
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. Install yaw rate
and lateral G sen-
sor securely.
Go to step 7. Go to step 5.
Repair harness Go to step 6.
between yaw rate
and lateral G sen-
sor and VDCCM.
Repair or replace Replace VDCCM.
VDCCM connec- <Ref. to VDC-8,
tor. VDC Control Mod-
ule (VDCCM).>
No