Subaru 2003 LEGACY Service Manual page 80

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
5 CHECK POOR CONTACT.
Is there poor contact in shift solenoid 2 circuit?
6 CHECK SHIFT SOLENOID 2 (IN TRANSMIS-
SION).
1) Remove transmission connector from
bracket.
2) Drain automatic transmission fluid.
CAUTION:
Do not drain the automatic transmission flu-
id until it cools down.
3) Remove oil pan, and disconnect connector
from shift solenoid 2.
4) Measure resistance between shift solenoid
2 connector and transmission ground.
Connector & terminal
No. 1 — Transmission ground:
Is the measured value within the specified
range?
7 CHECK HARNESS CONNECTOR BETWEEN
SHIFT SOLENOID 2 AND TRANSMISSION.
Measure resistance of harness between shift
solenoid 2 and transmission connector.
Connector & terminal
(AT6) No. 1 — (T4) No. 2:
Is the measured value less than the specified
value?
8 CHECK HARNESS CONNECTOR BETWEEN
SHIFT SOLENOID 2 AND TRANSMISSION.
Measure resistance of harness between shift
solenoid 2 connector and transmission ground.
Connector & terminal
(T4) No. 2 — Transmission ground:
Does the measured value exceed the specified
value?
Step Value
There is poor contact.
10 — 16 Ω
1 Ω
1 MΩ
AT-78
Yes
Repair poor con- Replace TCM.
tact. <Ref. to AT-76,
Transmission Con-
trol Module
(TCM).>
Go to step 7. Replace shift sole-
noid 2 assembly.
<Ref. to AT-67,
Shift Solenoids,
Duty Solenoids
and ATF Temper-
ature Sensor.>
Go to step 8. Repair open circuit
in harness
between shift sole-
noid 2 and trans-
mission connector.
Even if "POWER" Repair short circuit
indicator lights up, harness between
the circuit has shift solenoid 2
returned to a nor- and transmission
mal condition at connector.
this time. A tempo-
rary poor contact
of the connector or
harness may be
the cause. Repair
harness or con-
nector in shift sole-
noid 2 and
transmission.
No