Subaru LEGACY 2003 Service Manual page 32

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
ABS (DIAGNOSTICS)
6 CHECK BATTERY SHORT OF ABS WARN-
ING LIGHT HARNESS.
1) Turn ignition switch to OFF.
2) Measure voltage between connector (F45)
or (F2) and chassis ground.
Connector & terminal
LHD: (F45) No. 5 (+) — Chassis ground
( − − − − ):
RHD: (F2) No. 18 (+) — Chassis ground
( − − − − ):
Is the measured value less than the speci-
fied value?
7 CHECK BATTERY SHORT OF ABS WARN-
ING LIGHT HARNESS.
1) Turn ignition switch to ON.
2) Measure voltage between connector (F45)
or (F2) and chassis ground.
Connector & terminal
LHD: (F45) No. 5 (+) — Chassis ground
( − − − − ):
RHD: (F2) No. 18 (+) — Chassis ground
( − − − − ):
Is the measured value less than the speci-
fied value?
8 CHECK GROUND CIRCUIT OF ABSCM&H/U.
Measure resistance between ABSCM&H/U
and chassis ground.
Connector & terminal
(F49) No. 23 — GND:
Is the measured value less than the specified
value?
9 CHECK WIRING HARNESS.
Measure resistance between connector (F45)
or (F2) and chassis ground.
Connector & terminal
LHD: (F45) No. 5 — Chassis ground:
RHD: (F2) No. 18— Chassis ground:
Is the measured value less than the specified
value?
10 CHECK POOR CONTACT IN CONNECTORS.
Turn ignition switch to OFF.
Is there poor contact in connectors between
combination meter and ABSCM&H/U?
Step Value
3 V
3 V
0.5 Ω
0.5 Ω
There is no poor contact.
ABS-30
Yes
Go to step 7. Repair wiring har-
ness.
Go to step 8. Repair wiring har-
ness.
Go to step 9. Repair
ABSCM&H/U
ground harness.
Go to step 10. Repair harness/
connector.
Replace Repair connector.
ABSCM&H/U.
<Ref. to ABS-6,
ABS Control Mod-
ule and Hydraulic
Control Unit
(ABSCM&H/U).>
No