Subaru 2002 IMPREZA Service Manual page 705

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
1 CHECK DTC P0705 ON DISPLAY.
2 CHECK INPUT SIGNAL FOR ECM.
1)Turn the ignition switch to ON.
2)Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B135) No. 26 (+) — Chassis ground ( − − − − ):
3 CHECK HARNESS BETWEEN ECM AND
TRANSMISSION HARNESS CONNECTOR.
1)Turn the ignition switch to OFF.
2)Disconnect the connectors from ECM and
transmission harness connector (T3).
3)Measure the resistance of harness between
ECM connector and chassis ground.
Connector & terminal
(B135) No. 26 — Chassis ground:
4 CHECK TRANSMISSION HARNESS CON-
NECTOR.
1)Disconnect the connector from inhibitor
switch.
2)Measure the resistance of harness between
transmission harness connector and engine
ground.
Connector & terminal
(T3) No. 12 — Engine ground:
5 CHECK INHIBITOR SWITCH.
Measure the 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. Is there any fault in selector
Check
Does the Subaru Select Moni-
tor 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" posi-
tions?
cable connection to inhibitor
switch?
EN-273
ENGINE (DIAGNOSTICS)
Yes
Inspect the DTC Go to step 2.
P0705 using "List
of Diagnostic
Trouble Code
(DTC)". <Ref. to
EN-83, List of
Diagnostic Trou-
ble Code (DTC).>
Even if MIL lights Go to step 3.
up, the circuit has
returned to a nor-
mal condition at
this time.
Repair the ground Go to step 4.
short circuit in har-
ness between
ECM and trans-
mission harness
connector.
Repair the ground Go to step 5.
short circuit in har-
ness between
transmission har-
ness and inhibitor
switch connector.
Go to step 6. Replace the inhibi-
tor switch. <Ref. to
AT-28, Inhibitor
Switch.>
Repair the selector Contact with your
cable connection. Subaru distributor
<Ref. to CS-10, service.
INSPECTION,
NOTE:
Select Cable.>
Inspection by DTM
is required,
cause
cause is deteriora-
tion of
parts.
No
be-
probable
multiple