Subaru 2003 LEGACY Service Manual page 109

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
1 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1) Turn ignition switch to OFF.
2) Disconnect connector from TCM and trans-
mission.
3) Measure resistance of harness between
TCM and transmission connector.
Connector & terminal
(B54) No. 6 — (B11) No. 6:
Is the measured value less than the speci-
fied value?
2 CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure resistance harness connector
between TCM and chassis ground.
Connector & terminal
(B54) No. 6 — Chassis ground:
Does the measured value exceed the specified
value?
3 CHECK TRANSFER DUTY SOLENOID.
Measure resistance between transmission
connector and transmission terminals.
Connector & terminal
(T4) No. 6 — No. 16:
Is the measured value within the specified
range?
4 PREPARE SUBARU SELECT MONITOR.
Do you have a Subaru Select Monitor?
5 CHECK OUTPUT SIGNAL EMITTED FROM
TCM.
1) Connect connectors to TCM and transmis-
sion.
2) Turn ignition switch to ON (engine OFF).
3) Select lever is moved to P range.
4) Throttle is fully closed.
5) Measure voltage between TCM connector
and chassis ground.
Connector & terminal
(B54) No. 6 (+) — Chassis ground ( − − − − ):
Is the measured value less than the speci-
fied value?
6 CHECK OUTPUT SIGNAL EMITTED FROM
TCM.
1) Select lever is moved to D range.
2) Measure voltage between TCM connector
and chassis ground.
Connector & terminal
(B54) No. 6 (+) — Chassis ground ( − − − − ):
Is the measured value within the specified
range?
7 CHECK SPECIFICATIONS.
Is VDC system or SPORT shift equipped?
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Value
1 Ω
1 MΩ
10 — 17 Ω
Subaru Select Monitor is avail-
able.
1 V
5 — 7 V
The vehicle is equipped with
the VDC system or SPORT
shift.
AT-107
Yes
Go to step 2. Repair open circuit
in harness
between TCM and
transmission con-
nector.
Go to step 3. Repair short circuit
in harness
between TCM and
transmission con-
nector.
Go to step 4. Go to step 13.
Go to step 7. Go to step 5.
Go to step 9. Go to step 12.
Even if "POWER" Go to step 12.
indicator lights up,
the circuit has
returned to a nor-
mal condition at
this time. A tempo-
rary poor contact
of the connector or
harness may be
the cause. Repair
harness or con-
nector in the trans-
fer duty solenoid
and TCM connec-
tor.
Go to step 10. Go to step 8.
No