Subaru Legacy 2003 Service Manual page 475

DIAGNOSTICS FOR ENGINE STARTING FAILURE
ENGINE (DIAGNOSTICS)
6 CHECK FUEL PUMP RELAY.
1) Disconnect connectors from fuel pump
relay and main relay.
2) Remove fuel pump relay and main relay
with bracket.
3) Connect battery to fuel pump relay connec-
tor terminals No. 1 and No. 3.
4) Measure resistance between connector ter-
minals of fuel pump relay.
Terminals
No. 2 — No. 4:
Is the measured value less than the speci-
fied value?
7 CHECK HARNESS BETWEEN ECM AND
FUEL PUMP RELAY CONNECTOR.
1) Disconnect connectors from ECM.
2) Measure resistance of harness between
ECM and fuel pump relay connector.
Connector & terminal
(B134) No. 11 — (B46) No. 3:
Is the measured value less than the speci-
fied value?
8 CHECK POOR CONTACT.
Check poor contact in ECM connector.
Is there poor contact in ECM connector?
Step Value
10 Ω
1 Ω
There is poor contact.
EN(H4SO)-78
Yes
Go to step 7. Replace fuel pump
relay. <Ref. to
FU(H4SO)-47,
Fuel Pump
Relay.>
Go to step 8. Repair open circuit
in harness
between ECM and
fuel pump relay
connector.
Repair poor con- Check fuel injec-
tact in ECM con- tor circuit. <Ref. to
nector. EN(H4SO)-80,
FUEL INJECTOR
CIRCUIT, Diag-
nostics for Engine
Starting Failure.>
No