Subaru Legacy 2005 Service Manual page 1291

Step
3 CHECK INPUT SIGNAL OF STARTER MO-
TOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from starter
motor.
3) Turn the ignition switch to START.
4) Measure the power supply voltage between
starter motor connector terminal and engine
ground.
Connector & terminal
(B14) No. 1 (+) — Engine ground (
NOTE:
• For AT model, place the select lever in "P" or
"N" range.
• For MT model, depress the clutch pedal.
4 CHECK GROUND CIRCUIT OF STARTER
MOTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the ground cable terminal from
starter motor.
3) Measure the resistance of ground cable
between ground cable terminal and engine
ground.
5 CHECK HARNESS BETWEEN BATTERY
AND IGNITION SWITCH CONNECTOR.
1) Disconnect the connector from ignition
switch.
2) Measure the power supply voltage between
ignition switch connector and chassis ground.
Connector & terminal
(B72) No. 3 (+) — Chassis ground (
6 CHECK IGNITION SWITCH.
1) Disconnect the connector from ignition
switch.
2) Measure the resistance between ignition
switch terminals after turning the ignition
switch to START position.
Terminals
No. 2 — No. 3:
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 after 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:
Diagnostics for Engine Starting Failure
Is the voltage more than 10 V? Go to step 4.
−
):
Is the resistance less than 5
Ω?
Is the voltage more than 10 V? Go to step 6.
−
):
Is the resistance less than 5
Ω?
Is the voltage more than 10 V? Go to step 8.
−
):
−
):
Is the resistance less than 1
Ω?
EN(H4DOTC)(diag)-51
Check
Check the starter
motor. <Ref. to
SC(H4SO 2.0)-6,
Starter.>
Go to step 7.
Go to step 9.
ENGINE (DIAGNOSTICS)
Yes No
Go to step 5.
Repair the open
circuit of ground
cable.
Check the follow-
ing and repair if
necessary.
• Blown out
fuse
• Open circuit
of harness
between igni-
tion switch and
battery
Replace the igni-
tion switch.
Repair the open or
ground short cir-
cuit of harness
between starter
relay and ignition
switch.
Replace the
starter relay.