Subaru Legacy 2004 Service Manual page 604

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK ANY OTHER DTC ON DISPLAY.
2 CHECK INPUT SIGNAL FROM ECM.
1) Turn the ignition switch to ON.
2) Place the select lever other than "N" and
"P" range.
3) Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B135) No. 12 (+) — 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. 12 — 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. 11 — Engine ground:
5 CHECK INHIBITOR SWITCH.
Measure the resistance between inhibitor
switch connector receptacle's terminals with
select lever at other than "N" and "P" range.
Terminals
No. 7 — No. 12:
6 CHECK SELECT CABLE CONNECTION.
Check
Is any other DTC displayed?
Is the voltage more than 10 V? Even if the mal-
"
):
Is the resistance more than 1
M&?
Is the resistance more than 1
M&?
Is the resistance more than 1
M&?
Is there any fault in select
cable connection to inhibitor
switch?
EN(H4SO 2.0)(diag)-172
Yes
Inspect the DTC Go to step 2.
using "List of Diag-
nostic Trouble
Code (DTC)".
<Ref. to EN(H4SO
2.0)(diag)-66, List
of Diagnostic Trou-
ble Code (DTC).>
Go to step 3.
function indicator
light illuminates,
the circuit has
returned to a nor-
mal condition at
this time.
Go to step 4. Repair the ground
short circuit in har-
ness between
ECM and trans-
mission harness
connector.
Go to step 5. Repair the ground
short circuit in har-
ness between
transmission har-
ness connector
and inhibitor
switch connector.
Go to step 6. Replace the inhibi-
tor switch. <Ref. to
4AT-52, Inhibitor
Switch.>
Repair the select Replace the ECM.
cable connection. <Ref. to FU(H4SO
<Ref. to CS-14, 2.0)-34, Engine
INSPECTION, Control Module
Select Cable.> (ECM).>
No