Subaru LEGACY 2006 Manual page 282

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK SELECT CABLE.
2 CHECK INPUT SIGNAL OF ECM.
1) Turn the ignition switch to ON.
2) Measure the voltage between ECM and
chassis ground with select lever at "N" and "P"
range.
Connector & terminal
(B136) No. 31 (+) — Chassis ground (–):
3 CHECK INPUT SIGNAL OF ECM.
Measure the voltage between ECM and chassis
ground with select lever at other than "N" and
"P" range.
Connector & terminal
(B136) No. 31 (+) — Chassis ground (–):
4 CHECK POOR CONTACT.
Check poor contact of ECM connector.
5 CHECK INPUT SIGNAL OF ECM.
Measure the voltage between ECM and chassis
ground.
Connector & terminal
(B136) No. 31 (+) — Chassis ground (–):
6 CHECK HARNESS BETWEEN ECM AND IN-
HIBITOR SWITCH CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM and
inhibitor switch.
3) Measure the resistance of harness between
ECM and inhibitor switch connector.
Connector & terminal
(B136) No. 31 — (T7) No. 7:
(B136) No. 6 — (T7) No. 12:
Check
Is there any fault in the select
cable?
Is the voltage less than 1 V?
Is the voltage more than 10 V? Go to step 4.
Is there poor contact in ECM
connector?
Is the voltage more than 10 V? Repair the battery
Is the resistance less than 1 Ω? Go to step 7.
EN(H4SO)(diag)-245
ENGINE (DIAGNOSTICS)
Yes No
Repair or adjust Go to step 2.
the select cable.
<Ref. to CS-26,
INSPECTION,
Select Cable.>
Go to step 3. Go to step 5.
Go to step 5.
Repair the poor Contact the SOA
contact of ECM service center.
connector.
Go to step 6.
short circuit of har-
ness between
ECM and inhibitor
switch connector.
Repair the harness
and connector.
NOTE:
In this case, repair
the following item:
• Open circuit in
harness between
ECM and inhibitor
switch connector
• Poor contact of
coupling connector
• Poor contact of
inhibitor switch
connector
• Poor contact in
ECM connector