Subaru IMPREZA 2002 Service Manual page 142

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
I
CHECK INPUT SIGNAL FOR TCM.
1)Connect the connector to transmission.
2)Warm-up the transmission until the ATF tem-
perature is about 80°C (176°F).
NOTE:
If ambient temperature is below 0°C (32°F)
drive the vehicle until the ATF reaches its oper.
ating temperature.
3)Measure the voltage between TCM connec-
tor terminal.
Connector & terminal
Non-turbo model
(B55) NO. 11 (+)
-
NO. 10 ( - ) :
(B54) NO. 11 (+)
-
NO. 20 ( - ) :
r .
~
Turbo model
9
CHECK INPUT SIGNAL FOR TCM USING
SUBARU SELECT MONITOR.
1)Connect the connector to transmission.
2)Turn the ignition switch to ON (engine OFF).
Step
6 CHECK ATF TEMPERATURE SENSOR.
1)Turn the ignition switch to ON (engine OFF).
2)Measure the resistance between transmis-
sion connector terminals.
Connector & terminal
(T4) NO. 11
-
NO. 12:
7 PREPARE SUBARU SELECT MONITOR.
~~
Check
Does the resistance value
ncrease while the ATF temper
3ture decreases?
30 you have a Subaru Select
Monitor?
s the voltage between 0.4 and
1.9 V?
1oes the ATF temperature
jradually decrease?
3
there poor contact in ATF
smperature sensor circuit?
Yes
Go to step 7.
Go
to step 9.
Even if the AT OIL
TEMP warning
lights up, the cir-
cuit has returned
to a normal condi-
tion at this time.
Temporary poor
:ontact of the con.
lector or harness
nay be the case.
Repair harness or
:ontact in the ATF
:emperatwe sen-
;or
and transmis-
sion connector.
Even if the AT OIL
rEMP warning
ights up, the cir-
:uit has returned
o a normal condi-
ion at this time.
remporary poor
:ontact of the con-
lector or harness
nay be the case.
3epair harness
or
:ontact in the ATF
emperature sen-
ior and transmis-
;ion connector.
Iepair poor con-
act.
No
So
to step 11.
30 to step 8.
30 to step 10.
50 to step 10.
ieplace the TCM.
:Ref. to AT-45,
tansmission Con-
' 0 1 Module
TCM).>
AT-50