Subaru Legacy 2002 Service Manual page 2600

DIAGNOSTICS CHART WITH SELECT MONITOR
No.
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
(−):
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
(−):
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:
12 CHECK BATTERY SHORT OF HARNESS.
Measure voltage between VDCCM connector
and chassis ground.
Connector & terminal
DTC 21 / (F87) No. 14 (+) — Chassis
ground (−):
DTC 23 / (F87) No. 49 (+) — Chassis
ground (−):
DTC 25 / (F87) No. 18 (+) — Chassis
ground (−):
DTC 27 / (F87) No. 16 (+) — Chassis
ground (−):
Step
Is the voltage less than 1
V?
Is the voltage less than 1
V?
Is the resistance between
1.0 and 1.5 kΩ?
Is the voltage less than 1
V?
VDC-141
Check Yes
Go to step 10.
Go to step 11.
Go to step 12.
Go to step 13.
VDC (Diagnostics)
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.>
Repair harness/
connector
between VDCCM
and ABS sensor.
Repair harness
between VDCCM
and ABS sensor.