Subaru Legacy 2002 Service Manual page 2513

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
VDC (Diagnostics)
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:
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
(−):
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
(−):
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:
Step
Is the resistance between
1.0 and 1.5 kΩ?
Is the voltage less than 1
V?
Is the voltage less than 1
V?
Is the resistance between
1.0 and 1.5 kΩ?
VDC-54
Check Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
No
Replace ABS sen-
sor. Front <Ref. to
VDC-28, Front
ABS Sensor.>
Rear <Ref. to
VDC-29, Rear
ABS Sensor.>
Replace ABS sen-
sor. Front <Ref. to
VDC-28, Front
ABS Sensor.>
Rear <Ref. to
VDC-29, Rear
ABS Sensor.>
Replace ABS sen-
sor. Front <Ref. to
VDC-28, Front
ABS Sensor.>
Rear <Ref. to
VDC-29, Rear
ABS Sensor.>
Repair harness/
connector
between VDCCM
and ABS sensor.