Subaru Legacy 2002 Service Manual page 1492

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
No.
1 CHECK DTC P0705 ON DISPLAY.
2 CHECK INPUT SIGNAL FOR ECM.
1) Turn ignition switch to ON.
2) Measure voltage between ECM and chas-
sis ground.
Connector & terminal
(B134) No. 8 (+) — Chassis ground (−):
3 CHECK HARNESS BETWEEN ECM AND
TRANSMISSION HARNESS CONNECTOR.
1) Turn ignition switch to OFF.
2) Disconnect connectors from ECM and
transmission harness connector (T3).
3) Measure resistance of harness between
ECM connector and chassis ground.
Connector & terminal
(B134) No. 8 — Chassis ground:
4 CHECK TRANSMISSION HARNESS CON-
NECTOR.
1) Disconnect connector from inhibitor switch.
2) Measure resistance of harness between
transmission harness connector and engine
ground.
Connector & terminal
(T3) No. 12 — Engine ground:
5 CHECK INHIBITOR SWITCH.
Measure resistance between inhibitor switch
connector receptacle's terminals in selector
lever except for "N" position.
Terminals
No. 7 — No. 12:
6 CHECK SELECTOR CABLE CONNECTION.
Step
Does the Subaru Select
Monitor or OBD-II general
scan tool indicate DTC
P0705?
Is the voltage between 4.5
and 5.5 V at except "N"
and "P" positions?
Is the resistance less than
10 Ω?
Is the resistance less than
10 Ω?
Is the resistance more than
1 MΩ at except "N" and "P"
positions?
Is there any fault in selec-
tor cable connection to
inhibitor switch?
EN(H6)-285
Check Yes
Inspect DTC
P0705 using "List
of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN(H6)-87, List of
Diagnostic
Trouble Code
(DTC).>
Even if MIL lights
up, the circuit has
returned to a nor-
mal condition at
this time.
Repair ground
short circuit in
harness between
ECM and trans-
mission harness
connector.
Repair ground
short circuit in
harness between
transmission har-
ness and inhibitor
switch connector.
Go to step 6.
Repair selector
cable connection.
<Ref. to CS-11,
INSPECTION,
Select Cable.>
Engine (DIAGNOSTICS)
No
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Replace inhibitor
switch. <Ref. to
AT-29, Inhibitor
Switch.>
Contact with your
Subaru distributor
service.
NOTE:
Inspection by
DTM is required,
because probable
cause is deterio-
ration of multiple
parts.