Subaru IMPREZA GD 2007 Series Manual page 1493

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
6 CHECK HARNESS BETWEEN ECM AND
FUEL INJECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from fuel injector
on faulty cylinders.
3) Turn the ignition switch to ON.
4) Measure the voltage between the ECM and
chassis ground for faulty cylinders.
Connector & terminal
#1 (B137) No. 8 (+) — Chassis ground (–):
#2 (B137) No. 9 (+) — Chassis ground (–):
#3 (B137) No. 10 (+) — Chassis ground (–):
#4 (B137) No. 11 (+) — Chassis ground (–):
7 CHECK FUEL INJECTOR.
1) Turn the ignition switch to OFF.
2) Measure the resistance between fuel injec-
tor terminals on faulty cylinder.
Terminals
No. 1 — No. 2:
8 CHECK INSTALLATION OF CAMSHAFT PO-
SITION SENSOR/CRANKSHAFT POSITION
SENSOR.
9 CHECK CRANK SPROCKET.
Remove the timing belt cover.
10 CHECK INSTALLATION CONDITION OF
TIMING BELT.
Turn the crankshaft, and align alignment mark
on crank sprocket with alignment mark on cylin-
der block.
11 CHECK FUEL LEVEL.
12 CHECK STATUS OF MALFUNCTION INDI-
CATOR LIGHT.
1) Clear the memory using the Subaru Select
Monitor or general scan tool.
<Ref. to EN(STI)(diag)-48, Clear Memory Mode.>
NOTE:
• Subaru Select Monitor
<Ref. to EN(STI)(diag)-33, Subaru Select Mon-
itor.>
• General scan tool
Refer to operating manuals for the general scan
tool.
2) Start the engine, and drive the vehicle 10
minutes or more.
Check
Is the voltage 10 V or more?
Is the resistance less than 1 Ω? Replace the faulty
Is the camshaft position sensor
or crankshaft position sensor
loosely installed?
Is the crank sprocket rusted or
does it have damaged teeth?
Is the timing belt dislocated
from its proper position?
Is the fuel meter indication
higher than the "Lower" level?
Does the malfunction indicator
light illuminate or blink?
EN(STI)(diag)-162
Yes No
Repair the short Go to step 7.
circuit to power in
the harness
between the ECM
and fuel injector.
Go to step 8.
fuel injector. <Ref.
to FU(H4DOTC)-
37, Fuel Injector.>
Tighten the cam- Go to step 9.
shaft position sen-
sor or crankshaft
position sensor.
Replace the crank Go to step 10.
sprocket. <Ref. to
ME(H4DOTC)-57,
Crank Sprocket.>
Go to step 11.
Repair the installa-
tion condition of
timing belt. <Ref. to
ME(H4DOTC)-48,
Timing Belt.>
Go to step 12. Replenish fuel so
that fuel meter indi-
cation is higher
than the "Lower"
level. After replen-
ishing fuel, Go to
step 12.
Go to step 14. Go to step 13.