Subaru Legacy 2004 Service Manual page 2560

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK DTC OF TCM.
2 CHECK ECM.
3 CHECK FUSE (No. 32).
1) Turn the ignition switch to OFF.
2) Remove the fuse.
4 CHECK HARNESS CONNECTOR BETWEEN
TCM AND ECM.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from TCM and
transmission.
3) Measure the resistance of harness
between TCM and transmission connector.
Connector & terminal
(B55) No. 19 — (B137) No. 9:
5 CHECK HARNESS CONNECTOR BETWEEN
TCM AND ECM.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B55) No. 19 — Chassis ground:
6 CHECK TCM OUTPUT SIGNAL.
1) Connect the TCM and ECM connector.
2) Turn the ignition switch to ON. (engine
OFF)
3) Shift the select lever to "P" range.
4) Measure the voltage between TCM con-
nector and chassis ground.
Connector & terminal
(B55) No. 19 (+) — Chassis ground (
7 CHECK TCM OUTPUT SIGNAL.
1) Shift the select lever to "D" range.
2) Measure the voltage between TCM con-
nector and chassis ground.
Connector & terminal
(B55) No. 19 (+) — Chassis ground (
8 CHECK POOR CONTACT.
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Check
Is DTC of Transmission Range
Sensor Circuit (PRNDL Input)
circuit detected?
Is the communication between
Subaru Select Monitor and
ECM normal?
Is the fuse (No. 32) blown out? Replace the fuse
Is the resistance less than 1
"?
Is the resistance more than 1
M"?
Is the voltage more than 10 V? Go to step 7.
$
):
Is the voltage less than 1 V?
$
):
Is there any open or poor con-
tact of connector (loosing ter-
minal, entering foreign matter,
damaging connector body)?
5AT(diag)-101
Yes
Perform the diag- Go to step 2.
nosis according to
DTC.
Go to step 3. Perform the diag-
nosis according to
DTC concerning
ECM.
Go to step 4.
(No. 32). If the
replaced fuse (No.
32) has blown out
easily, repair the
short circuit in har-
ness between fuse
(No. 32) and TCM.
Go to step 5. Repair the open
circuit in harness
between TCM and
transmission con-
nector, and poor
contact in cou-
pling connector.
Go to step 6. Repair the short
circuit in harness
between transmis-
sion connector
and chassis
ground.
Replace the TCM.
<Ref. to 5AT-61,
Transmission Con-
trol Module
(TCM).>
Go to step 8. Replace the TCM.
<Ref. to 5AT-61,
Transmission Con-
trol Module
(TCM).>
Repair the poor Check neutral cir-
contact. cuit inside the
ECM.
No