Subaru IMPREZA 2002 Service Manual page 171

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
I
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
~
Step
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
1)Turn the ignition switch to OFF
2)Disconnect the connector from TCM and
transmission.
3)Measure the resistance of harness between
TCM and transmission connector.
Connector & terminal
Non-turbo model
Turbo model
(954) NO. 14
-
(91 1) NO. 3 :
(954) NO. 15
-
(91 1) NO. 3 :
CHECK HARNESS CONNECTOR BETWEEN
TCM AND TRANSMISSION.
Measure the resistance of harness between
TCM connector and transmission ground.
Connector & terminal
Non-turbo model
Turbo model
(954) No. 14
-
Chassis ground:
(B54) No. 15
-
Chassis ground:
CHECK LOW CLUTCH TIMING SOLENOID.
Measure the resistance between transmission
connector terminals.
Connector & terminal
(T4) NO. 3
-
NO. 16:
CHECK OUTPUT SIGNAL EMITTED FROM
TCM.
1)Connect the connectors to TCM and trans-
mission.
2)Turn the ignition switch to ON (engine OFF).
3)Move the select lever to " D range.
4)Measure the voltage between TCM connec-
tor and chassis ground.
Connector & terminal
Non-turbo model
Turbo model
(854)
No.
14 (+)
-
Chassis ground ( - ) :
(954) No. 15 (+)
-
Chassis ground ( - ) :
CHECK OUTPUT SIGNAL EMITTED FROM
TCM.
1)Move the select lever to " 2 range.
2)Measure the voltage between TCM connec-
tor and chassis ground.
Connector & terminal
Non-turbo model
Turbo model
(954) No. 14 (+)
-
Chassis ground ( - ) :
(954) No. 15 (+)
-
Chassis ground ( - ) :
1
CHECK POOR CONTACT.
Check
s
the resistance less than 1
2?
Is the resistance more than 1
MR?
I s
the resistance between 10
and 16 R?
Is the voltage more than 9V?
I s
the voltage less than 1 V?
I s
there poor contact in low
clutch timing solenoid circuit?
Yes
; o to step 2.
30 to step 3 .
30 to step 4.
30 to step 5.
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
contact in the TCM
and transmission.
Repair poor con-
tact.
No
3epair open circuit
n harness
ietween TCM and
.ransmission con-
lector.
3epair short circuit
n harness
3etween TCM and
transmission con-
nector.
Go to step 7.
Go to step 6.
Go to step
6 .
Replace the TCM.
<Ref. to AT-45,
Transmission Con
trol Module
(TCM).>
AT-79