Subaru Legacy 2002 Service Manual page 2583

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
VDC (Diagnostics)
No.
8 CHECK GROUND CIRCUIT OF VDCCM.
1) Disconnect connector from VDCCM.
2) Remove cover from VDCCM connector.
<Ref. to VDC-17, REMOVE, VDCCM Connec-
tor Cover.>
3) Connect connector to VDCCM.
4) Measure resistance between VDCCM con-
nector and chassis ground.
Connector & terminal
(F87) No. 64 — Chassis ground:
9 CHECK POOR CONTACT IN CONNEC-
TORS.
10 CHECK HARNESS OF YAW RATE AND
LATERAL G SENSOR.
1) Disconnect connector from VDCCM.
2) Measure resistance between VDCCM and
yaw rate and lateral G sensor.
Connector & terminal
(F87) No. 65 — (R100) No. 4:
(F87) No. 66 — (R100) No. 1:
(F87) No. 67 — (R100) No. 2:
11 CHECK GROUND SHORT OF HARNESS.
Measure resistance between VDCCM connec-
tor and chassis ground.
Connector & terminal
(F87) No. 65 — Chassis ground:
(F87) No. 66 — Chassis ground:
(F87) No. 67 — Chassis ground:
12 CHECK BATTERY SHORT OF HARNESS.
Measure voltage between VDCCM connector
and chassis ground.
Connector & terminal
(F87) No. 65 (+) — Chassis ground (−):
(F87) No. 66 (+) — Chassis ground (−):
(F87) No. 67 (+) — Chassis ground (−):
13 CHECK BATTERY SHORT OF HARNESS.
1) Turn ignition switch to ON.
2) Measure voltage between VDCCM and
chassis ground.
Connector & terminal
(F87) No. 65 (+) — Chassis ground (−):
(F87) No. 66 (+) — Chassis ground (−):
(F87) No. 67 (+) — Chassis ground (−):
14 CHECK YAW RATE AND LATERAL G SEN-
SOR.
1) Turn ignition switch to OFF.
2) Install yaw rate and lateral G sensor to
body.
3) Connect all connectors.
4) Turn ignition switch to ON.
5) Measure voltage between VDCCM connec-
tor terminals.
Connector & terminal
(F87) No. 66 (+) — No. 64 (−):
Step
Is the resistance less than
0.5 Ω?
Is there poor contact in
VDCCM connector?
Is the resistance less than
0.5 Ω?
Is the resistance more than
1 MΩ?
Is the voltage less than 0.5
V?
Is the voltage less than 0.5
V?
Is the voltage between 2.1
and 2.9 V?
VDC-124
Check Yes
Repair harness
between yaw rate
and lateral G sen-
sor and VDCCM.
Repair or replace
VDCCM connec-
tor.
Go to step 11.
Go to step 12.
Go to step 13.
Go to step 14.
Go to step 15.
No
Go to step 9.
Replace VDCCM.
<Ref. to VDC-9,
VDC Control Mod-
ule (VDCCM).>
Repair harness
between yaw rate
and lateral G sen-
sor and VDCCM.
Repair harness
between yaw rate
and lateral G sen-
sor and VDCCM.
Repair harness
between yaw rate
and lateral G sen-
sor and VDCCM.
Repair harness
between yaw rate
and lateral G sen-
sor and VDCCM.
Replace yaw rate
and lateral G sen-
sor. <Ref. to VDC-
22, Yaw Rate and
Lateral G Sen-
sor.>