Subaru Legacy 2003 - Page 53

VDC-51
VDC (DIAGNOSTICS)
DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
Step Value Yes No
1 CHECK ABS SENSOR.
1) Turn ignition switch to OFF.
2) Disconnect connector from ABS sensor.
3) Measure resistance of ABS sensor connec-
tor terminals.
Terminal
Front RH No. 1 — No. 2:
Front LH No. 1 — No. 2:
Rear RH No. 1 — No. 2:
Rear LH No. 1 — No. 2:
Is the measured value within the specified
range?
1.0 — 1.5 kΩ Go to step 2. Replace ABS sen-
sor. Front <Ref. to
VDC-27, Front
ABS Sensor.>
Rear <Ref. to
VDC-28, Rear
ABS Sensor.>
2 CHECK BATTERY SHORT OF ABS SEN-
SOR.
1) Disconnect connector from VDCCM.
2) Measure voltage between ABS sensor and
chassis ground.
Terminal
Front RH No. 1 (+) — Chassis ground (
−
−−
−
):
Front LH No. 1 (+) — Chassis ground ( −
−−
−
):
Rear RH No. 1 (+) — Chassis ground (
−
−−
−
):
Rear LH No. 1 (+) — Chassis ground (
−
−−
−
):
Is the measured value less than the speci-
fied value?
1 V Go to step 3. Replace ABS sen-
sor. Front <Ref. to
VDC-27, Front
ABS Sensor.>
Rear <Ref. to
VDC-28, Rear
ABS Sensor.>
3 CHECK BATTERY SHORT OF ABS SEN-
SOR.
1) Turn ignition switch to ON.
2) Measure voltage between ABS sensor and
chassis ground.
Terminal
Front RH No. 1 (+) — Chassis ground (
−
−−
−
):
Front LH No. 1 (+) — Chassis ground ( −
−−
−
):
Rear RH No. 1 (+) — Chassis ground (
−
−−
−
):
Rear LH No. 1 (+) — Chassis ground (
−
−−
−
):
Is the measured value less than the speci-
fied value?
1 V Go to step 4. Replace ABS sen-
sor. Front <Ref. to
VDC-27, Front
ABS Sensor.>
Rear <Ref. to
VDC-28, Rear
ABS Sensor.>
4 CHECK HARNESS/CONNECTOR BETWEEN
VDCCM AND ABS SENSOR.
1) Turn ignition switch to OFF.
2) Connect connector to ABS sensor.
3) Measure resistance between VDCCM con-
nector terminals.
Connector & terminal
DTC 21 / (F87) No. 14 — No. 15:
DTC 23 / (F87) No. 49 — No. 19:
DTC 25 / (F87) No. 18 — No. 46:
DTC 27 / (F87) No. 16 — No. 17:
Is the measured value within the specified
range?
1.0 — 1.5 kΩ Go to step 5. Repair harness/
connector
between VDCCM
and ABS sensor.