Subaru IMPREZA 2002 Service Manual page 181

I
DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
4
CHECK OUTPUT SIGNAL EMITTED FROM
TCM USING SUBARU SELECT MONITOR.
1)Turn the ignition switch to ON (Engine OFF).
2)Throttle is fully open.
5 CHECK POOR CONTACT.
6
CHECK LINE PRESSURE 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 line pressure duty solenoid.
4)Measure the resistance between line pres-
sure duty solenoid connector and transmission
ground.
Terminal
No. 1
-
Transmission ground:
1 7 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND LINE PRESSURE
DUTY SOLENOID.
Measure the resistance of harness between
line pressure duty solenoid and transmission
connector.
Connector & terminal
(T4) NO. 5
-
(AT2) NO. 1:
1 8 CHECK HARNESS CONNECTOR BETWEEN
TRANSMISSION AND LINE PRESSURE
DUTY SOLENOID.
Measure the resistance of harness between
transmission connector and transmission
ground.
Connector & terminal
(T4) No. 5
-
Transmission ground:
Check
s the value less than 25%?
s there poor contact in line
)ressure duty solenoid circuit?
s the resistance between 2.0
ind 4.5 Q?
s the resistance less than
1
a?
s the resistance more than 1
dQ?
Yes
lven if the AT OIL
'EMP warning
ghts up, the cir-
uit has returned
3
a normal condi-
on at this time. A
zmporary poor
ontact of the con-
lector or harness
lay be the cause.
iepair harness or
onnector in trans-
nission.
Iepair poor con-
act.
io
to step 17.
; o to step 18.
iven if the AT OIL
-EM P warning
ghts up, the cir-
:uit has returned
D
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
)ressure duty
;olenoid and
ransmission.
No
; o to step 15.
3eplace the TCM.
:Ref. to AT-45,
rransmission Con-
rol Module
TCM).>
3eplace the line
)ressure duty
;olenoid. <Ref. to
4T-39, Shift Sole-
ioids, Duty Sole-
\aids and ATF
Temperature Sen-
;or.>
3epair open circuit
n harness
)etween line pres-
jure duty solenoid
md transmission
:onnector.
3epair short circuit
n harness
jetween line pres-
;ure duty solenoid
ind transmission
:onnector.
AT-89