Subaru IMPREZA 2002 Service Manual page 190

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
I
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
s
the resistance more than 1
dR?
Step
CHECK LOCK-UP DUTY SOLENOID (IN
TRANSMISSION).
1)Remove the transmission connector from
bracket.
2)Drain the automatic transmission fluid.
CAUTION:
Do not drain the automatic transmission flu-
id until it cools down.
3)Remove the oil pan, and disconnect the con-
nector from lock-up duty solenoid.
4)Measure the resistance between lock-up
duty solenoid connector and transmission
ground.
Terminal
No. 1
-
Transmission ground:
CHECK HARNESS CONNECTOR BETWEEN
MISSION.
Measure the resistance of harness between
lock-up duty solenoid and transmission con-
nector.
LOCK-UP DUTY SOLENOID AND TRANS-
Connector & terminal
(T4) NO. 13
-
(AT3) NO. 1:
CHECK HARNESS CONNECTOR BETWEEN
MISSION.
Measure the resistance of harness between
transmission connector and transmission
ground.
LOCK-UP DUTY SOLENOID AND TRANS-
Connector & terminal
(T4) No. 13
-
Transmission ground:
Even if the AT OIL
TEMP warning
lights up, the cir-
cuit has returned
to a normal condi-
tion at this time. A
temporary poor
contact of the con.
nector or harness
may be the cause.
Repair harness or
connector in lock-
up duty solenoid
and transmission.
ind 17 R?
s
the resistance less than 1
2?
IGo to step 13.
No
Replace the lock-
up duty solenoid.
<Ref. to AT-39,
Shift Solenoids,
Duty Solenoids
and ATF Tempera-
ture Sensor.>
Repair open circuit
in harness
between TCM and
transmission con-
nector.
Repair short circuit
in harness
between lock-up
duty solenoid and
transmission con-
nector.
AT-98