Subaru Legacy 2002 Service Manual page 2706

DIAGNOSTICS CHART WITH SELECT MONITOR
No.
1 CHECK RUNNING FIELD.
2 CHECK INSTALLATION OF YAW RATE AND
LATERAL G SENSOR.
Check installation of yaw rate and lateral G
sensor.
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
lateral G sensor and chassis ground.
Connector & terminal
(R100) No. 3 — Chassis ground:
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-17, REMOVE, VDCCM Connec-
tor 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:
5 CHECK POOR CONTACT IN CONNEC-
TORS.
6 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:
7 CHECK GROUND CIRCUIT OF VDCCM.
1) Disconnect connector from VDCCM.
2) Remove cover from VDCCM connector.
<Ref. to VDC-17, VDCCM Connector Cover.>
3) Connect connector to VDCCM.
4) Measure resistance between VDCCM and
chassis ground.
Connector & terminal
(F87) No. 64 — Chassis ground:
8 CHECK POOR CONTACT IN CONNEC-
TORS.
Step
Was the vehicle driven on
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?
Is the resistance less than
0.5 Ω?
Is there poor contact in
VDCCM connector?
VDC-247
Check Yes
When driving on
surfaces with
holes or bumps at
high speeds,
VDCCM some-
times records
trouble codes in
memory.
Go to step 3.
Go to step 6.
Repair harness
between yaw rate
and lateral G sen-
sor and VDCCM.
Repair or replace
VDCCM connec-
tor.
Go to step 9.
Repair harness
between yaw rate
and lateral G sen-
sor and VDCCM.
Repair or replace
VDCCM connec-
tor.
VDC (Diagnostics)
No
Go to step 2.
Install yaw rate
and lateral G sen-
sor securely.
Go to step 4.
Go to step 5.
Replace VDCCM.
<Ref. to VDC-9,
VDC Control Mod-
ule (VDCCM).>
Go to step 7.
Go to step 8.
Replace VDCCM.
<Ref. to VDC-9,
VDC Control Mod-
ule (VDCCM).>