Subaru Legacy 2003 Service Manual page 3109

DIAGNOSTICS CHART WITH SELECT MONITOR
VDC (DIAGNOSTICS)
8 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?
9 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?
10 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?
11 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?
Step Value
1.0 — 1.5 kΩ
1 V
1 V
1.0 — 1.5 kΩ
VDC-136
Yes
Go to step 9. Replace ABS sen-
sor. Front <Ref. to
VDC-27, Front
ABS Sensor.>
Rear <Ref. to
VDC-28, Rear
ABS Sensor.>
Go to step 10. Replace ABS sen-
sor. Front <Ref. to
VDC-27, Front
ABS Sensor.>
Rear <Ref. to
VDC-28, Rear
ABS Sensor.>
Go to step 11. Replace ABS sen-
sor. Front <Ref. to
VDC-27, Front
ABS Sensor.>
Rear <Ref. to
VDC-28, Rear
ABS Sensor.>
Go to step 12. Repair harness/
connector
between VDCCM
and ABS sensor.
No