Subaru Legacy (2005 year). Manual - part 441
EN(H6DO)(diag)-77
ENGINE (DIAGNOSTICS)
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
Check
Yes
No
1
CHECK ANY OTHER DTC ON DISPLAY.
Is any other DTC displayed?
Check DTC using
the List of Diag-
nostic Trouble
Code (DTC). <Ref.
to
EN(H6DO)(diag)-
66, List of Diag-
nostic Trouble
Code (DTC).>
2
CHECK HARNESS BETWEEN ECM AND
VARIABLE VALVE LIFT DIAGNOSIS OIL
PRESSURE SWITCH CONNECTOR.
1) Idle 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
(E72) No. 1 — Engine ground:
Is the resistance more than 1
M
Ω?
Repair the ground
short circuit of har-
ness between
ECM and variable
valve lift diagnosis
oil pressure switch
connector.
3
CHECK HARNESS BETWEEN ECM AND
VARIABLE VALVE LIFT DIAGNOSIS OIL
PRESSURE SWITCH CONNECTOR.
Measure the resistance in harness between
ECM and variable valve lift diagnosis oil pres-
sure switch connector.
Connector & terminal
(B135) No. 29 — (E72) No. 1:
Is the resistance less than 1
Ω?
Replace the vari-
able valve lift diag-
nosis oil pressure
switch. <Ref. to
FU(H6DO)-28,
Variable Valve Lift
Diagnosis Oil
Pressure Switch.>
Go to step 4.
Repair the open
circuit of harness
between ECM and
variable valve lift
diagnosis oil pres-
sure switch con-
nector.
4
CHECK DTC.
1) Perform the clear memory mode. <Ref. to
EN(H6DO)(diag)-41, Clear Memory Mode.>
2) Check the DTC after idling the engine.
Is DTC displayed?
Replace the oil
switching solenoid
valve. <Ref. to
ME(H6DO)-80, Oil
Switching Sole-
noid Valve.> Go to
step 5.
Temporary poor
contact occurs.
5
CHECK DTC.
1) Perform the clear memory mode. <Ref. to
EN(H6DO)(diag)-41, Clear Memory Mode.>
2) Check the DTC after idling the engine.
Is DTC displayed?
Check for oil rout-
ing.
Contact the SUB-
ARU dealer.
Temporary poor
contact occurs.