Power - Subaru LEGACY 2003 Service Manual

DIAGNOSTICS CHART WITH DIAGNOSIS CONNECTOR
Step
1 CHECK INSTALLATION OF ABSCM&H/U
CONNECTOR.
Turn ignition switch to OFF.
Is ABSCM&H/U connector inserted into
ABSCM until the clamp locks onto it?
2 CHECK DIAGNOSIS TERMINAL.
Measure resistance between diagnosis termi-
nals (B81) and chassis ground.
Terminals
Diagnosis terminal (A) — Chassis
ground:
Diagnosis terminal (B) — Chassis
ground:
Is the measured value less than the specified
value?
3 CHECK DIAGNOSIS LINE.
1) Turn ignition switch to OFF.
2) Connect diagnosis terminal (B81) to diag-
nosis connector (B82) No. 8.
3) Disconnect connector from ABSCM&H/U.
4) Measure resistance between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 4 — Chassis ground:
Is the measured value less than the speci-
fied value?
4 CHECK GENERATOR.
1) Start the engine.
2) Idle the engine.
3) Measure voltage between generator and
chassis ground.
Terminal
Generator B terminal (+) — Chassis
ground ( − − − − ):
Is the measured value within the specified
range?
5 CHECK BATTERY TERMINAL.
Turn ignition switch to OFF.
Is there poor contact at battery terminal?
6 CHECK POWER SUPPLY OF ABSCM.
1) Disconnect connector from ABSCM&H/U.
2) Start engine.
3) Idle the engine.
4) Measure voltage between ABSCM&H/U
connector and chassis ground.
Connector & terminal
(F49) No. 1 (+) — Chassis ground ( − − − − ):
Is the measured value within the specified
range?
7 CHECK WIRING HARNESS.
1) Disconnect connector (F45) from connector
(B62).
2) Turn ignition switch to ON.
Does the ABS warning light turn on?
Value
Connector is locked securely.
0.5 Ω
0.5 Ω
10 - 15 V
There is no poor contact.
10 - 15 V
ABS warning light remains off. Go to step 8.
ABS-33
ABS (DIAGNOSTICS)
Yes
Go to step 2. Insert ABSCM&H/
U connector into
ABSCM&H/U until
the clamp locks
onto it.
Go to step 3. Repair diagnosis
terminal harness.
Go to step 4. Repair harness
connector
between
ABSCM&H/U and
diagnosis connec-
tor.
Go to step 5. Repair generator.
H4 engine model:
<Ref. to
SC(H4SO)-14,
Generator.>
H6 engine model:
<Ref. to
SC(H6DO)-14,
Generator.>
Go to step 6. Repair battery ter-
minal.
Go to step 7. Repair
ABSCM&H/U
power supply cir-
cuit.
Repair front wiring
harness.
No