Subaru LEGACY 2006 Manual page 985

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK HARNESS BETWEEN ECM AND
VARIABLE VALVE LIFT DIAGNOSIS OIL
PRESSURE SWITCH CONNECTOR.
1) Warm-up the engine.
2) Turn the ignition switch to OFF.
3) Disconnect the connectors from ECM and
variable valve lift diagnosis oil pressure switch
connector.
4) Measure the resistance of harness
between variable valve lift diagnosis oil pres-
sure switch connector and engine ground.
Connector & terminal
(E71) No. 1 — Engine ground:
3 CHECK HARNESS BETWEEN ECM AND
VARIABLE VALVE LIFT DIAGNOSIS OIL
PRESSURE SWITCH CONNECTOR.
Measure the resistance of harness between
ECM and variable valve lift diagnosis oil pres-
sure switch connector.
Connector & terminal
(B134) No. 31 — (E71) No. 1:
4 CHECK DTC.
1) Clear the memory. <Ref. to EN(H4SO
U5)(diag)-46, Clear Memory Mode.>
2) Check the DTC after idling the engine.
5 CHECK DTC.
1) Clear the memory. <Ref. to EN(H4SO
U5)(diag)-46, Clear Memory Mode.>
2) Check the DTC after idling the engine.
Check
Is any other DTC displayed?
Is the resistance more than 1
MΩ?
Is the resistance less than 1
Ω?
Is DTC displayed?
Is DTC displayed?
EN(H4SO U5)(diag)-80
Yes No
Check DTC using Go to step 2.
"List of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H4SO
U5)(diag)-73, List
of Diagnostic Trou-
ble Code (DTC).>
Go to step 3.
Repair the ground
short circuit of har-
ness between
ECM and variable
valve lift diagnosis
oil pressure switch
connector.
Replace the vari- Repair the open
able valve lift diag- circuit of harness
nosis oil pressure
between ECM and
switch. <Ref. to variable valve lift
FU(H4SO)-30, diagnosis oil pres-
Variable Valve Lift sure switch con-
Diagnosis Oil nector.
Pressure Switch.>
Go to step 4.
Replace the oil END
switching solenoid
valve. <Ref. to
ME(H4SO)-83, Oil
Switching Sole-
noid Valve.> Go to
step 5.
Check for oil rout- END
ing.
Contact your SOA
Service Center.