Subaru IMPREZA 2002 Service Manual page 216

DIAGNOSTIC PROCEDURE FOR NO-DIAGNOSTIC TROUBLE CODE (DTC)
I
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
1 3 CHECK HARNESS CONNECTOR BETWEEN
TCM AND INHIBITOR SWITCH.
1)Turn the ignition switch to OFF.
2)Disconnect the connector from TCM and
inhibitor switch.
3)Measure the resistance of harness between
TCM and inhibitor switch connector.
Connector & terminal
Non-turbo model
Turbo model
(854) NO. 10
-
(T7) NO. 4:
(B55) NO. 6
-
(T7) NO. 4:
1 4
CHECK INPUT SIGNAL FOR TCM.
1)Turn the ignition switch to OFF.
2)Connect the connector to TCM and inhibitor
switch.
3)Turn the ignition switch to ON.
4)Measure the voltage between TCM and
chassis ground.
Connector & terminal
Non-turbo model
Turbo model
.
.
. .
(854) No. 10 (+)
-
Chassis ground
( - ) I
(B55) No. 6 (+)
-
Chassis ground
( - ) I
5 CHECK INPUT SIGNAL FOR TCM.
Measure the voltage between TCM and chas-
sis ground.
Connector & terminal
Non-turbo model
Turbo model
(B54) No. 10 (+)
-
Chassis ground (-):
(B55) No. 6 (+)
-
Chassis ground (-):
8 6 CHECK "2" RANGE INDICATOR LIGHT
BULB.
1)Turn the ignition switch to OFF.
2)Remove the combination meter.
3)Remove the "2" range indicator light bulb
from combination met,er.
7 CHECK HARNESS CONNECTOR BETWEEN
TCM AND COMBINATION METER.
1)Disconnect the connectors from TCM and
combination meter.
2)Measure the resistance of harness between
TCM and combination meter.
Connector & terminal
Non-turbo model
Turbo model
(854) No. 10
-
(i12) No. 4:
(B55) No. 6
-
(i12) No. 4:
Check
s the resistance less than
1
n?
s the voltage less than 1 V in
'2" range?
s the voltage more than 8 V in
ither ranges?
s the "2" range indicator light
iulb OK?
s the resistance less than 1
2?
Yes
30 to step 54.
; o to step 55.
30 to step 65.
30
to step 57.
; o to step 65.
No
3epair open circuit
n harness
letween TCM and
nhibitor switch
:onnector, and
ioor contact in
:oupling connec-
'or.
30
to step 65.
3eplace the TCM.
:Ref. to AT-45,
rransmission Con-
rol Module
TCM).>
3eplace the " 2
'ange indicator
ight bulb. <Ref. to
DI-11, Combina-
ion Meter Assem-
ilY.>
3epair open circuit
n harness
letween TCM and
:ombination
neter, and poor
:ontact in TCM
:onnector.
AT-I 24