Subaru Legacy 2005 Service Manual page 1771

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
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
(E71) No. 1 — Engine ground:
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. 21 — (E71) No. 1:
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.
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.
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(H6DO)(diag)-75
ENGINE (DIAGNOSTICS)
Yes
Check DTC using Go to step 2.
the List of Diag-
nostic Trouble
Code (DTC). <Ref.
to
EN(H6DO)(diag)-
66, List of Diag-
nostic Trouble
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(H6DO)-28, diagnosis oil pres-
Variable Valve Lift sure switch con-
Diagnosis Oil nector.
Pressure Switch.>
Go to step 4.
Replace the oil Temporary poor
switching solenoid contact occurs.
valve. <Ref. to
ME(H6DO)-80, Oil
Switching Sole-
noid Valve.> Go to
step 5.
Check for oil rout- Temporary poor
ing. contact occurs.
Contact the SUB-
ARU dealer.
No