Subaru Legacy 2004 Service Manual page 2581

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
6 CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1) Connect the connector.
2) Turn the ignition switch to ON. (engine
OFF)
3) Read the ATF temperature using Subaru
Select Monitor.
7 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND CONTROL VALVE
BODY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from transmis-
sion.
3) Remove the transmission connector from
bracket.
4) Lift-up the vehicle and place it on rigid
racks.
NOTE:
Raise all wheels off floor.
5) Drain the ATF.
CAUTION:
Do not drain the ATF until it cools down.
6) Remove the oil pan, and disconnect the
connector from control valve body connector.
7) Measure the resistance between transmis-
sion connector and control valve body connec-
tor.
Connector & terminal
(T4) No. 12 — (T5) No. 1:
(T4) No. 6 — (T6) No. 2:
8 CHECK POOR CONTACT.
Check poor contact of ATF temperature sensor
1 circuit.
Check
Does the ATF temperature
gradually decrease?
Is the resistance less than 1
"?
Is there poor contact?
5AT(diag)-122
Yes
Even if the SPORT Go to step 8.
indicator lights
blinks, the system
is in normal condi-
tion. A temporary
poor contact of
connector or har-
ness may be the
cause. Repair har-
ness or contact in
the ATF tempera-
ture sensor and
transmission con-
nector.
Replace the con- Repair the open
trol valve body. circuit in harness
<Ref. to 5AT-58, between control
Control Valve valve body con-
Body.> nector and trans-
mission connector.
Repair the poor Replace the TCM.
contact. <Ref. to 5AT-61,
Transmission Con-
trol Module
(TCM).>
No