Subaru IMPREZA 2002 Service Manual page 185

I
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step-
Check
Yes No
so r.
>
5 CHECK POOR CONTACT.
6
CHECK 2-4 BRAKE DUTY SOLENOID (IN
TRANSMISSION).
Is there poor contact in 2-4
brake duty solenoid circuit?
Is the resistance between 2.0
and 4.5 R?
AT-93
3epair poor con-
act.
30
to step 17.
.
Heplace the TCM.
<Ref. to AT-45,
Transmission Con-
trol Module
(TCM).>
Replace the 2-4
brake duty sole-
noid. <Ref. to AT-
39, Shift Sole-
noids, Duty Sole-
noids and ATF
Temperature Sen-
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 2-4 brake duty solenoid.
4)Measure the resistance between 2-4 brake
duty solenoid connector and transmission
ground.
Terminal
No. 1
-
Transmission ground:
7 CHECK HARNESS CONNECTOR BETWEEN
IS
the resistance less than 1 30 to step 18.
Even if the AT OIL
rEMP warning
ights up, the cir-
:uit has returned
o a normal condi-
ion at this time. A
emporary poor
:ontact of the con-
lector or harness
nay be the cause.
3epair harness or
:onnector in line
3ressure duty
solenoid and
ransmission.
Repair open circuil
in harness
between 2-4 brake
duty solenoid and
transmission con-
nector.
Repair short circuil
in harness
between 2-4 brake
duty solenoid and
transmission con-
nector.
TRANSMISSION AND 2-4 BRAKE DUTY SO-
LENOID.
Measure the resistance of harness between 2-
4 brake duty solenoid and transmission con-
nector.
Connector & terminal
(T4) NO. 9
-
(AT7)
NO.
1:
8 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND 2-4 BRAKE DUTY SO-
LENOID.
Measure the resistance of harness between
transmission connector and transmission
ground.
Connector & terminal
(T4) No. 9
-
Transmission ground:
Q?
Is the resistance more than 1
MQ?