Subaru LEGACY 2003 Service Manual page 253

DIAGNOSTICS CHART WITH SELECT MONITOR
Step
1 CHECK RUNNING FIELD.
Was the vehicle driven on surfaces with holes
or bumps at high speeds?
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 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?
4 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 and
chassis ground.
Connector & terminal
(F87) No. 63 ( + + + + ) — Chassis ground ( − − − − ):
Is the measured value within the specified
range?
5 CHECK POOR CONTACT IN CONNECTORS.
Is there poor contact in yaw rate and lateral G
sensor connector?
6 CHECK GROUND CIRCUIT OF YAW RATE
AND LATERAL G SENSOR.
Measure resistance between yaw rate and lat-
eral G sensor and chassis ground.
Connector & terminal
(R100) No. 6 — Chassis ground:
Is the measured value less than the specified
value?
Value
Driven.
Fixed securely.
10 — 15 V
10 — 15 V
There is poor contact.
0.5 Ω
VDC-251
VDC (DIAGNOSTICS)
Yes
When driving on Go to step 2.
surfaces with
holes or bumps at
high speeds,
VDCCM some-
times records trou-
ble codes in
memory.
Go to step 3. Install yaw rate
and lateral G sen-
sor securely.
Go to step 6. Go to step 4.
Repair harness Go to step 5.
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).>
Go to step 9. Go to step 7.
No