Subaru LEGACY 2006 Manual page 137

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK HARNESS BETWEEN ECM AND OIL
SWITCHING SOLENOID VALVE.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM and oil
switching solenoid valve.
3) Measure the resistance between oil switch-
ing solenoid valve and engine ground.
Connector & terminal
(E68) No. 1 — Engine ground:
(E68) No. 2 — Engine ground:
2 CHECK OIL SWITCHING SOLENOID VALVE.
1) Remove the oil switching solenoid valve
connector.
2) Measure the resistance between oil switch-
ing solenoid valve terminals.
Terminals
No. 1 — No. 2:
Check
Is the resistance more than 1
MΩ?
Is the resistance between 6
and 12 Ω?
EN(H4SO)(diag)-100
Yes No
Go to step 2. Repair the short
circuit 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. ME(H4SO)-83, Oil
Switching Sole-
noid Valve.>