Subaru Legacy 2005 Service Manual page 2518

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
3 CHECK TCM OUTPUT SIGNAL.
1) Turn the ignition switch to ON. (engine
OFF)
2) Measure the voltage between TCM con-
nector and chassis ground.
Connector & terminal
(B54) No. 16 (+) — Chassis ground (
4 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
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
(B54) No. 12 — (B11) No. 9:
(B54) No. 21 — (B11) No. 10:
(B54) No. 6 — (B11) No. 11:
5 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM connector and chassis ground.
Connector & terminal
(B54) No. 12 — Chassis ground:
(B54) No. 21 — Chassis ground:
(B54) No. 6 — Chassis ground:
6 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION CONNECTOR AND CON-
TROL VALVE BODY CONNECTOR.
Measure the resistance between transmission
connector and control valve body connector.
Connector & terminal
(B11) No. 9 — (T10) No. 10:
(B11) No. 10 — (T10) No. 9:
(B11) No. 11 — (T10) No. 8:
7 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION CONNECTOR AND CON-
TROL VALVE BODY CONNECTOR.
Measure the resistance between transmission
connector and chassis ground.
Connector & terminal
(B11) No. 9 — Chassis ground:
(B11) No. 10 — Chassis ground:
(B11) No. 11 — Chassis ground:
8 CHECK POOR CONTACT.
NOTE:
Data communication malfunction is detected
when the malfunction occurred on inspection
area above while transmission assembly is re-
placing or "Clear Memory 2" is performing.
When the repair is performed with following di-
agnosis above, perform the "Clear Memory 2",
and then recheck that the DTC of TCM data
communication malfunction is not detected.
Check
Is the voltage 10 — 13 V?
−
):
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
Is the resistance less than 1
Ω?
Is the resistance more than 1
MΩ?
Is there any open or poor con-
tact of connector (loosing ter-
minal, entering foreign matter,
damaging connector body)?
5AT(diag)-100
Yes
Go to step 4. Go to step 5.
Go to step 5. Repair the open
circuit of harness
between TCM and
transmission con-
nector, and poor
contact in connec-
tor.
Go to step 6. Repair the short
circuit of harness
between TCM and
transmission con-
nector.
Go to step 7. Repair the open
circuit of harness
between control
valve body con-
nector and trans-
mission connector.
Go to step 8. Repair the short
circuit of harness
between control
valve body con-
nector and trans-
mission connector.
Repair the poor Replace the trans-
contact. mission assembly.
<Ref. to 5AT-38,
Automatic Trans-
mission Assem-
bly.>
No