Subaru Legacy 2005 Service Manual page 1292

ENGINE (DIAGNOSTICS)
Step
9 CHECK INPUT VOLTAGE OF ECM.
1) Turn the ignition switch to OFF.
2) Connect the starter relay connector.
3) Disconnect the connector 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 OF STARTER MO-
TOR.
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 resistance less than 1
Ω?
Is the voltage more than 10 V? Go to step 11.
−
):
Is the resistance less than 1
Ω?
EN(H4DOTC)(diag)-52
Check
Go to step 10.
Check the engine
control module
(ECM) power sup-
ply and ground
line. <Ref. to
EN(H4DOTC)(diag
)-53, CHECK
POWER SUPPLY
AND GROUND
LINE OF ENGINE
CONTROL MOD-
ULE (ECM), Diag-
nostics for Engine
Starting Failure.>
Yes No
Repair the open
circuit of harness
between ECM and
starter relay.
Repair the open or
ground short cir-
cuit of harness
between starter
relay and starter.
Repair the open
circuit between
ignition switch and
ECM.