Subaru 2009 IMPREZA Service Manual page 1530

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK HARNESS BETWEEN ECM AND OIL
FLOW CONTROL SOLENOID VALVE CON-
NECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM and
oil flow control solenoid valve.
3) Measure the resistance of harness between
ECM and oil flow control solenoid valve.
Connector & terminal
(B137) No. 15 — (E37) No. 1:
(B137) No. 14 — (E37) No. 2:
2 CHECK HARNESS BETWEEN ECM AND OIL
FLOW CONTROL SOLENOID VALVE CON-
NECTOR.
Measure the resistance between ECM and
chassis ground.
Connector & terminal
(B137) No. 15 — Chassis ground:
(B137) No. 14 — Chassis ground:
3 CHECK OIL FLOW CONTROL SOLENOID
VALVE.
Measure the resistance between oil flow control
solenoid valve terminals.
Terminals
No. 1 — No. 2:
Check
Is the resistance less than 1 ? Go to step 2.
Is the resistance 1 M or
more?
Is the resistance 6 — 12 ?
EN(H4DOTC)(diag)-309
ENGINE (DIAGNOSTICS)
Yes No
Repair the harness
and connector.
NOTE:
In this case, repair
the following item:
• Open circuit of
harness between
ECM and oil flow
control
valve connector
• Poor contact of
coupling connector
Go to step 3. Repair the short
circuit to ground in
harness between
ECM and oil flow
control solenoid
valve connector.
Repair the poor Replace the oil
contact of ECM flow control sole-
and oil flow control noid valve. <Ref. to
solenoid valve con- ME(H4DOTC)-61,
nector. Camshaft.>
solenoid