Subaru IMPREZA GD 2007 Series Manual page 204

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK HARNESS BETWEEN ECM AND OIL
SWITCHING SOLENOID VALVE.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from the ECM
and oil switching solenoid valve.
3) Measure the resistance of harness between
ECM and oil switching solenoid valve.
Connector & terminal
(B137) No. 25 — (E38) No. 1:
(B137) No. 24 — (E38) No. 2:
2 CHECK HARNESS BETWEEN ECM AND OIL
SWITCHING SOLENOID VALVE.
Measure the resistance between ECM and
chassis ground.
Connector & terminal
(B137) No. 25 — Chassis ground:
(B137) No. 24 — Chassis ground:
3 CHECK OIL SWITCHING SOLENOID VALVE.
Measure the resistance between oil switching
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?
Is the resistance between 6 —
12 Ω?
EN(H4SO)(diag)-95
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
switching solenoid
valve connector
• Poor contact of
coupling connector
Go to step 3. Repair short cir-
cuit of the harness
to ground between
ECM and oil
switching solenoid
valve connector.
Repair the poor Replace the oil
contact of ECM switching solenoid
and oil switching valve. <Ref. to
solenoid valve con- ME(H4SO)-88, Oil
nector. Switching Solenoid
Valve.>