Subaru Legacy 2004 Service Manual page 1334

Step
7 CHECK INPUT VOLTAGE OF STARTER RE-
LAY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from starter relay.
3) Connect the connector to ignition switch.
4) Measure the input voltage between starter
relay connector and chassis ground while turn-
ing the ignition switch to START position.
Connector & terminal
(B225) No. 14 (+) — Chassis ground (
(B225) No. 16 (+) — Chassis ground (
8 CHECK STARTER RELAY.
1) Connect the battery to starter relay termi-
nals No. 15 and No. 16.
2) Measure the resistance between starter
relay terminals.
Terminals
No. 13 — No. 14:
9 CHECK INPUT VOLTAGE FROM ECM.
1) Turn the ignition switch to OFF.
2) Connect the starter relay connector.
3) Disconnect the connectors from ECM.
4) Measure the resistance of harness
between ECM and starter relay connector.
Connector & terminal
(B135) No. 32 — (B225) No. 15:
10 CHECK INPUT VOLTAGE FOR STARTER
MOTOR.
1) Turn the ignition switch to OFF.
2) Connect the connector to ECM.
3) Turn the ignition switch to START.
4) Measure the voltage between starter motor
and engine ground.
Connector & terminal
(B14) No. 1 (+) — Engine ground (
11 CHECK HARNESS BETWEEN IGNITION
SWITCH AND ECM.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ignition
switch and ECM.
3) Measure the resistance of harness
between ignition switch and ECM connector.
Connector & terminal
(B137) No. 8 — (B72) No. 2:
Diagnostics for Engine Starting Failure
Is the voltage more than 10 V? Go to step 8.
"
):
"
):
Is the resistance less than 1
'?
Is the resistance less than 1
'?
Is the voltage more than 10 V? Go to step 11.
"
):
Is the resistance less than 1
'?
EN(H4DOTC)(diag)-45
Check Yes
Go to step 9.
Go to step 10.
Check engine con-
trol module (ECM)
power supply and
ground line. <Ref.
to
EN(H4DOTC)(diag
)-46, CHECK
POWER SUPPLY
AND GROUND
LINE OF ENGINE
CONTROL MOD-
ULE (ECM), Diag-
nostics for Engine
Starting Failure.>
ENGINE (DIAGNOSTICS)
No
Repair the open or
ground short cir-
cuit in harness
between starter
relay and ignition
switch.
Replace the
starter relay.
Repair the open
circuit in harness
between ECM and
starter relay.
Repair the open or
ground short cir-
cuit in harness
between starter
relay and starter.
Repair the open
circuit between
ignition switch and
ECM.