Subaru Legacy 2003 - Page 89

VDC-87
VDC (DIAGNOSTICS)
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
Step Value Yes No
1 CHECK GROUND SHORT OF SENSOR AND
HARNESS.
1) Turn ignition switch OFF.
2) Disconnect connector from VDCCM.
3) Measure resistance between VDCCM con-
nector and chassis ground.
Connector & terminal
(F87) No. 63 — Chassis ground (Lateral
G sensor):
(F87) No. 78 — Chassis ground (Pres-
sure sensor):
Does the measured value exceed the spec-
ified value?
1 MΩ Go to step 3. Go to step 2.
2 CHECK GROUND SHORT OF HARNESS.
1) Disconnect connector from faulty sensors.
2) Measure resistance between VDCCM and
chassis ground.
Connector & terminal
(F87) No. 63 — Chassis ground (Lateral
G sensor):
(F87) No. 78 — Chassis ground (Pres-
sure sensor):
Does the measured value exceed the spec-
ified value?
1 MΩ Replace faulty
sensors.
Repair or replace
harness connec-
tor between
VDCCM and faulty
sensor.
3 CHECK BATTERY SHORT OF SENSOR AND
HARNESS.
Measure voltage between VDCCM and chas-
sis ground.
Connector & terminal
(F87) No. 63 (+) — Chassis ground (
−
−−
−
)
(Lateral G sensor):
(F87) No. 78 (+) — Chassis ground (
−
−−
−
)
(Pressure sensor):
Is the measured value less than the specified
value?
0.5 V Go to step 4. Go to step 5.
4 CHECK BATTERY SHORT OF SENSOR AND
HARNESS.
1) Turn ignition switch to ON.
2) Measure voltage between VDCCM connec-
tor and chassis ground.
Connector & terminal
(F87) No. 63 (+) — Chassis ground (
−
−−
−
)
(Lateral G sensor):
(F87) No. 78 (+) — Chassis ground (
−
−−
−
)
(Pressure sensor):
Is the measured value less than the speci-
fied value?
0.5 V Replace VDCCM.
<Ref. to VDC-8,
VDC Control Mod-
ule (VDCCM).>
Go to step 5.
5 CHECK BATTERY SHORT OF HARNESS.
1) Turn ignition switch to OFF.
2) Disconnect connector from faulty sensors.
3) Measure voltage between VDCCM and
chassis ground.
Connector & terminal
(F87) No. 63 (+) — Chassis ground (
−
−−
−
)
(Lateral G sensor):
(F87) No. 78 (+) — Chassis ground (
−
−−
−
)
(Pressure sensor):
Is the measured value less than the speci-
fied value?
0.5 V Go to step 6. Repair or replace
harness connec-
tor between
VDCCM and faulty
sensor.