Subaru IMPREZA GD 2007 Series Manual page 1645

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK HARNESS BETWEEN ECM AND OIL
FLOW CONTROL SOLENOID VALVE.
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.
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 Ω? Go to step 2.
Is the resistance 1 MΩ or more? Go to step 3.
Is the resistance between 6 —
12 Ω?
EN(STI)(diag)-314
Yes No
Repair the harness
and connector.
NOTE:
In this case, repair
the following item:
• Open circuit of
the harness be-
tween the ECM
and oil flow control
solenoid valve
connector
• Poor contact of
coupling connector
Repair the ground
short circuit of har-
ness between
ECM and oil flow
control solenoid
valve connector.
Repair the poor Replace the oil
contact of the ECM flow control sole-
and oil flow control noid valve. <Ref. to
solenoid valve con- ME(H4DOTC)-58,
nector. Camshaft.>