Subaru Legacy 2002 Service Manual page 2699

DIAGNOSTICS CHART WITH SELECT MONITOR
VDC (Diagnostics)
No.
1 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:
2 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, VDCCM Connector 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:
3 CHECK POOR CONTACT IN CONNEC-
TORS.
4 CHECK HARNESS OF YAW RATE AND
LATERAL G SENSOR.
1) Turn ignition switch OFF.
2) Disconnect connector from VDCCM.
3) Measure resistance between VDCCM and
yaw rate and lateral G sensor.
Connector & terminal
(F87) No. 65 — (R100) No. 4:
5 CHECK GROUND SHORT OF HARNESS.
Measure resistance between VDCCM and
chassis ground.
Connector & terminal
(F87) No. 65 — Chassis ground:
6 CHECK BATTERY SHORT OF HARNESS.
Measure voltage between VDCCM and chas-
sis ground.
Connector & terminal
(F87) No. 65 (+) — Chassis ground (−):
7 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 (−):
Step
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 more than
1 MΩ?
Is the voltage less than 0.5
V?
Is the voltage less than 0.5
V?
VDC-240
Check Yes
Go to step 4.
Repair harness
between yaw rate
and lateral G sen-
sor and VDCCM.
Repair or replace
VDCCM connec-
tor.
Go to step 5.
Go to step 6.
Go to step 7.
Replace yaw rate
and lateral G sen-
sor. <Ref. to VDC-
22, Yaw Rate and
Lateral G Sen-
sor.>
No
Go to step 2.
Go to step 3.
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.