Subaru 2009 IMPREZA Service Manual page 1292

Step
8 CHECK STARTER RELAY.
1) Connect the battery to starter relay termi-
nals No. 11 and No. 12.
2) Measure the resistance between starter
relay terminals.
Terminals
No. 9 — No. 10:
9 CHECK HARNESS BETWEEN ECM AND
STARTER RELAY CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM.
3) Measure the resistance of harness between
ECM and starter relay connector.
Connector & terminal
(B136) No. 20 — (B225) No. 12:
10 CHECK TRANSMISSION TYPE.
11 CHECK INPUT VOLTAGE OF CLUTCH
START SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the clutch start switch connec-
tor.
3) Turn the ignition switch to START.
4) Measure the voltage between the clutch
start switch connector and chassis ground.
Connector & terminal
(B106) No. 1 (+) — Chassis ground (–):
12 CHECK CLUTCH START SWITCH.
Measure the resistance between clutch start
switch terminals while depressing the clutch
pedal.
Terminals
No. 1 — No. 2:
13 CHECK HARNESS BETWEEN ECM AND
CLUTCH START SWITCH.
Measure the resistance of harness between
ECM and clutch start switch connector.
Connector & terminal
(B136) No. 32 — (B106) No. 2:
14 CHECK HARNESS BETWEEN ECM AND IG-
NITION SWITCH.
1) Turn the ignition switch to OFF.
2) Measure the resistance of harness between
the ECM and ignition switch connector.
Connector & terminal
(B136) No. 32 — (B72) No. 6:
Diagnostics for Engine Starting Failure
Is the resistance less than 1 ? Go to step 9.
Is the resistance less than 1 ? Go to step 10.
Is the transmission type AT?
Is the voltage 10 V or more?
Is the resistance less than 1 ? Go to step 13.
Is the resistance less than 1 ? Check the engine
Is the resistance less than 1 ? Go to step 15.
EN(H4DOTC)(diag)-71
Check Yes
Go to step 14.
Go to step 12.
control module
(ECM) power sup-
ply and ground
line. <Ref. to
EN(H4DOTC)(dia
g)-73, CHECK
POWER SUPPLY
AND GROUND
LINE OF ENGINE
CONTROL MOD-
ULE (ECM), Diag-
nostics for Engine
Starting Failure.>
ENGINE (DIAGNOSTICS)
No
Replace the starter
relay.
Repair the open
circuit of harness
between ECM and
starter relay con-
nector.
Go to step 11.
Repair open circuit
or short circuit to
ground in harness
between ignition
switch connector
and clutch start
switch connector.
Replace the clutch
start switch. <Ref.
to CL-27, Clutch
Switch.>
Repair open circuit
or short circuit to
ground in harness
between ECM and
clutch start switch
connector.
Repair open circuit
or short circuit to
ground in harness
between ECM and
ignition switch con-
nector.